stunthanger.com
Building Tips and technical articles. => Building techniques => Topic started by: MarcusCordeiro on December 26, 2012, 06:30:12 PM
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It took me a while to finally get this ship started...
It's a RSM kit of the ThunderGazer, but the wing I'll build using a lost foam fixture from Bob Hunt.
I ran out of balsa today, going to get more at the shop tomorrow and hopefully will have all ribs cut by tomorrow's evening.
So far, I'm loving it!!!
Marcus
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Marcus,
Nice choice! Kudos.
Good size model.
RSM has a kit I'm eyeballing.
Charles
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Cutting the ribs was fun!! ;)
Marcus
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Cutting the ribs was fun!! ;)Marcus
Marcus,
You're slacking. n1
Get more done and post!
Charles
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Marcus,
You're slacking. n1
Get more done and post!
Charles
C'mon Charles, give me a break, will you? New year's eve, gotta spend some time with the family, and besides, the shop didn't have 1/16 and I have to wait a few days before they get it S?P... Ok, you're right, I'm slacking, but just a little LL~ LL~
Marcus
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Marcus,
Was it you who said you had no local hobby shop and had to get everything by mail?
Charles
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No, we have many hobby shops around, only some don't carry control line.
Marcus
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No, we have many hobby shops around, only some don't carry control line.Marcus
Well Marcus,
Hobby shops all over the place, then you have no excuse. ;D
Go find that lost foam, get more done and post some great photos!! "Outstanding!" **)
It's a New Year and we both have projects to finish. #^
Wanna race? :!
Happy New Year!
Hey! Read my BLAST! n~
Charles
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Nice going Marcus. I have started my Bob Hunt lost foam Genesis MK III. Doing the ribs takes time, but they do come out perfect or near so. Cold weather and travel has me at a stop for a few days. Keep posting those photos. H^^
When I'm finished with this building, I'll have Bob cut me the wings for a Genesis MKIII... Even got a ST 46 to put on its nose, to copy Bob's ship...
Now, Ty, please, post pics of it, it's such a nice ship!!!
I have to solve the balsa issue, but in no time I'll be back with more pics.
Thanks for joining in...
Marcus
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When I'm finished with this building, I'll have Bob cut me the wings for a Genesis MKIII... Even got a ST 46 to put on its nose, to copy Bob's ship...
Now, Ty, please, post pics of it, it's such a nice ship!!!
I have to solve the balsa issue, but in no time I'll be back with more pics.
Thanks for joining in...
Marcus
Hi Marcus,
I am going with a foam wing in my Genesis MK III (1978 World Championship winner). Already have it and I will be using a PA .51 with rear exhaust muffler off the header.
My son, Aaron is getting ready to build the 1980 Genesis, also using a foam wing and a PA .40 on rear exhaust muffler.
I will be copying Bob's paint scheme but using different colors, no bronze dogs here anymore! LL~ LL~ LL~
BIG Bear
RNMM/AMM
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Cutting the ribs was fun!! ;)
Marcus
LOL that's why we do this !!
Randy
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Hi Marcus,
I am going with a foam wing in my Genesis MK III (1978 World Championship winner). Already have it and I will be using a PA .51 with rear exhaust muffler off the header.
My son, Aaron is getting ready to build the 1980 Genesis, also using a foam wing and a PA .40 on rear exhaust muffler.
I will be copying Bob's paint scheme but using different colors, no bronze dogs here anymore! LL~ LL~ LL~
BIG Bear
RNMM/AMM
Like this?
Marcus
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Hi Marcus,
That looks like the MK III. I have actually used the "bronze" Bob used before. The '80 Genesis has a longer fuselage and smaller wing with a swept forward TE.
I got a little disappointed because there have been several MK III built, but not too many of the '80 model. (I really like to build the "Less seen" models myself)
Bill
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Bill
I just hope we get to see some pics of those two!!
The pic I posted, I got from Bob himself.
Another one for general appreciation...
Marcus
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Out of slacking, here I come...
With the Magnum pretty advanced, I can have some time now to get this wing going #^
"I'm back"...LOL
Marcus
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Bill
I just hope we get to see some pics of those two!!
The pic I posted, I got from Bob himself.
Another one for general appreciation...
Marcus
Marcus,
Thanks for posting this picture! It will be interesting to compare this one with the 1980 version. You can see differences on the plans but nothing will show it for certain until the two models are side by side.
Thanks!
Bill
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I've had me some fun!!
Marcus
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I've had me some fun!!Marcus
Marcus,
Nice! I may try that one day.
I thought that system was set up in a way as to put oversized ribs in place then sand them down to the foam to guarentee perfect shapped ribs?
I do have Bob Hunt's text material, but forgive me, I haven't had the time to read it or look over his photos.
I plan on doing this when I build my first Bob Hunt wing.
Soon.
Charles
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Yes Charles, that's how you do it, but you have to shim the ribs and spars to compensate for the sheeting.
So far, a worderful experience. Once you have the ribs ready, it goes fast.
Little work aligning the ribs, and the good CA does its job.
Speaking of CA, I just ran out of it... HB~> LL~ LL~ LL~
Almost finished for the day...
Marcus
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Marcus, they ain't nuthin in stunt purdier than bare bones balsa wings!! It's almost a shame to cover the thing so it doesn't show! Nice work.
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Hi Marcus,
That wing sure looks pretty! I have found the Lost Foam system to be the easiest, most accurate, way of building a D or C tube wing. Besides building an I-Beam, the Lost Foam is my favorite method of doing wings! (I like it even better than foam wings! LOL!! )
Bill
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Thanks guys
I'm done for today, been working on that wing for 10 hours!!
Fun, fun, fun :)! :)! :)!
Marcus
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That wing looks great!
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That wing looks great!
Thank you Doug
Tomorrow I'm going to work on the TE shearwebs...
Marcus
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TE Shearwebs done!!
Now I have to prepare the molded LE.
Marcus
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Marcus,
I'm really following this, you're doing a great job! Hudos.
You're shear webs?
Do you cut them all the same using the first one as a guide?
Then put them in place till they are snug?
Is this how it's done?
That's 1/16" balsa on your wing, correct?
Good work.
Charles
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Hi Charles:
Marcus is following the instruction manual that I emailed to him on how to construct Lost-Foam wings in the fixtures that I produce. I also sent Marcus a copy of my DVD set on Lost-Foam construction. That DVD set is still available and details on its pricing is included on my Vendor's Corner Robin's View Productions page.
I would be pleased to send you the Lost-Foam instructions via email if you think you would find them useful. They explain how to easily make custom sized TE shear webs as well as myriad other building tips.
These are free and the offer is open to anyone who might like a copy of these PDF instructions. They come in four separate emails as the PDF files are quite large.
My email address is robinhunt@rcn.com
Later - Bob Hunt
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Hi Charles:
Marcus is following the instruction manual that I emailed to him on how to construct Lost-Foam wings in the fixtures that I produce. I also sent Marcus a copy of my DVD set on Lost-Foam construction. That DVD set is still available and details on its pricing is included on my Vendor's Corner Robin's View Productions page.I would be pleased to send you the Lost-Foam instructions via email if you think you would find them useful. They explain how to easily make custom sized TE shear webs as well as myriad other building tips. These are free and the offer is open to anyone who might like a copy of these PDF instructions. They come in four separate emails as the PDF files are quite large.My email address is robinhunt@rcn.com Later - Bob Hunt
Bob,
Thanks for that.
Yes, don't think for one NY minute the work you do, your talents and abilities with contemporary wing design and construction aren't on my mind.
You have no idea how I'm looking forward to building my first real stunt model using a straight and true Bob Hunt wing.
I'm currently digesting information because I believe electric is where things are going.
I'll be in touch when the time comes, I have a few loose ends to tie up with some sport models first.
Thanks again,
Charles
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The lost foam jig takes wing building to another level!!
Simple as that.
Marcus
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Not that kind of great news but I'm back at it...
Marcus
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The sheeting is ready for moulding.
Let's warm up that water #^ #^
Marcus
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Marcus,
Do you board sand both sides of that sheeting? CA to join?
1/16" sheeting?
Charles
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I only sand the outside.
Yes, CA for joining and 1/16.
Marcus
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Marcus,
Span of that model? Please.
Charles
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60 3/4" and 630 square inches of area... S?P
Marcus
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60 3/4" and 630 square inches of area... S?P
Marcus
Marcus,
That should weigh in well under 11oz. My guess is about 10.2oz.
Wait-a-minute! If you're sheeting with 1/16" stock, then the weight will be well below 11oz. I'll guess again at 8.5oz.
Charles
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60 3/4" and 630 square inches of area... S?P
Marcus
Mine with Dallas Hanna hardware in it weighed about 4 ounces per panel before silk span.
Looking good so far Marcus!
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I take it that is just the bare wood with no hardware. I was given a set of ribs one time and a set of plans. Was told the wing should be 10 1/2 ounces ready to go into the fuselage. I wound up with almost 15 ounces. But, it flew great in this Kansas wind we have once in a while.
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Thanks Matt
I've moulded the LE, and it was fairly easy. The wood bent no problems and I could wrap by myself. Wrap it tight!!
When the panels are finished, I'll weight them. Let's see if I can keep it light enough ;D
Marcus
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Marcus,
Like an injury, see what it looks like when the bandages are removed.
You said you wet the balsa sheeting, correct?
Do you wet the ace bandages also?
Wet first then wrap?
Wrap then wet everything?
Marcus,
I meant to ask when I seen this photo..
What actually is going on here? Did I miss your explanation?
Charles
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First you soak the balsa with warm water, mould and wrap.
The pic you're asking about is the mould bucks when I glued the MDF piece on them.
I'll send you Bob's PDF about it.
Marcus
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Hey it is right here on this forum right at the to of Buildidng Techniques. Well explained with pictures and all. Open your eyes fellows. It is also pinned there so it can't be lost.
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Back at it.
Left panel almost there... :)!
Marcus
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Left panel sort of finished. So far, no surprises, even I can't screw this up I guess LL~ LL~
Marcus
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Marcus,
Nice?
1/16" or 3/32" sheeting?
Charles
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It's 1/16, but next wing I'll go with 3/32...
Marcus
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Got to weight the panels.
Together they weight 4.62 oz.
I still have to add the TE, capstrips, BC, etc, but I think I'll be able to keep this wing light enough.
About to join the panels... #^ #^ #^
Marcus
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Marcus,
Looking really good!
Get anything new in the mail?
Charles
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No, not that I know. The panels are glued.
It looks like I'll be finishing soon..
Marcus
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I've cut the TE, but will do shears as explained by Doug Moon in his thread. I think that's the beauty of building threads, you learn a lot.
It's very clever to do so, more contact area making it strong, but who would think of that?
Thanks Doug, I owe you a six-pack...
Marcus
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Seems it's coming out quite well. I look forward the the completed plane. I'm sure it will be awesome.
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Thanks Randy
I also look forward to seeing your ship finished. That wing of yours is some work... #^
Marcus
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Marcus,
What's your trick, or how do you do that?
You get nothing but great remarks. n~
Charles
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Marcus,
What's your trick, or how do you do that?
You get nothing but great remarks. n~
Charles
Marcus asks good questions and then follows the good advise given? Or did I misunderstand your n~ ?
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Marcus,
What's your trick, or how do you do that?
You get nothing but great remarks. n~
Charles
Probably because he's building an actual Stunt model, using accepted practices....and will eventually complete it and fly it.
What a novel concept, huh?
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Marcus.
The wing looks fantastic! Cant wait to see the rest of it.
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Come on guys, let's be nice before the administrator gets upset. Marcus is doing a gret job on the build from pictures he has posted. I tried my own version of the Bobby Hunt's lost foam wing a few years back. This was after watching his video several times. My problem is finding vergin foam locally and I can't afford or have space like what Bobby gets. Have done wings using the Tom Morris setup and uing the jig from CLC also. They all work great when you follow instructions and have patience.
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Finished shearing the TE, really smart move.
Marcus
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Marcus,
Wow! looking really good.
1/16" or 3/32" ?
Charles
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Used some scrap 1/16.
Can't wait to finish this wing #^ #^ #^
Marcus
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Hi Marcus:
It looks as if you've shear webbed the back edge of the trailing edge. The TE cap will support that area; where you want the shear webs is at the front edge of the trailing edge opening between the two TE pieces...
Later - Bob Hunt
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Bob,
While your here,
Do you rip the (all the pieces) for the whole length of that webbing? The distance should be the same all the way tip to tip.
If not, a constant width piece could correct differences.
Am I thinking correctly?
Charles
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Hi Charles:
I custom fit each piece. I use a vernier to measure the gap and then transfer that to a piece of wood in a fixture that I made and slice the individual shear webs to size.
The photos should tell the story...
Later - Bob
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Notice also, as on Bob's, the grain on the shear webs should be vertical.
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Guys
I did the shears vertically on the frnt part of the back sheeting.
What you saw inthe pic I got from Doug Moon's build thread, thought was a good thing to do...
Check the pics again
Marcus
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I stand corrected, Marcus. But, you need to shear web those small spaces between the ribs as well!
I don't see the need for the aft shear web piece,s since the TE cap will do the same thing even better... y1
Later - Bob %^@
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Bob,
Thanks for the photos and the explanation.
1/16" or 3/32"?
.07?
Charles
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Ups... I thought I wasn't supposed to shear the small spaces, but will do!
Weighted the wing again today... But you won't have to guess the weight n1
Marcus
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Marcus,
You did put webbing at the front and rear of the TE top and bottom pieces?
Charles
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Yeah, but I missed a few spots. LL~ LL~
Gonna add the missing sh#ar and capstrip hopefully today
Marcus
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Capstrips OK :)!
Marcus
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If mine only looked that good.
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I'll install the BC and Leadouts later.
I'm going to work on the roght wing tip and weigh box, then I'll do the left tip, so I can carve any necessary ribs for the leaadouts to move freely.
I have to say that I think running the front leadout through the ribs where here's the shearwebs might be very fun... n~
Marcus
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I have to say that I think running the front leadout through the ribs where here's the shearwebs might be very fun... n~
Marcus
Easy peasy. Use music wire as fish tape.
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Easy peasy. Use music wire as fish tape.
That's exactly how I do it too.
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That's exactly how I do it too.
As does most of us !!! ;D ;D ;D ;D ;D ;D ;D ;D
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And so will I..
Marcus
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And so will I..
Marcus
Post photos...... ;D ;D
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Marcus,
I've been patiently waiting.
Have you progressed any?
Installed the bellcrank and leadouts?
Get anything new done?
I want to know!! LL~
Charles
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Good you asked...
Will be back at the wing this week, had been working on a combat model for a break.
Sometimes I like to study what I will do next, so I have a to-do list and don't get lost.
And needed to find a replacement for the basswood tension and compression relieve, got cedar...
And though it's not the wing, done some work on the fuselage.
As soon as I finish the wing, I'll start a thread on the building of this Thundergazer.
It's got to be airborne ASAP...
Marcus
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Marcus,
I wish I could make a list. I can never seem to find a pencil.
The wing is removable?
Charles
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It's looking very good, Marcus. That weight is awesome. Keep at it, man.
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Thanks Randy
Yes, Charles, it 'll be removable.
First time I will do one... Hope I don't add too much weight.
Going to work hard these days ;)
Marcus
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Now that I'm getting close to finishing this wing, I can honestly say that the lost foam jig is a great way to build a straight wing.
With a little effort, one can achieve great result, even when you have never done it, like myself.
I know a lot of little things that I can do better for the next one, but am very happy with the result I got so far.
A couple more days...
Marcus
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And it will get easier with each one you build as you will learn the little short cuts. The wing looks great.
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And it will get easier with each one you build as you will learn the little short cuts. The wing looks great.
Thanks John!
Since I decided to start flying in contests, I chose the ThunderGazer as the ship for that.
In Brasil we fly FAI rules, and when the TG was designed for that... VD~
To get a really good one, I should build some, and 3 are planned, one after the other.
This first one will have one Enya 61 RE, and the other two will be eletric.
I was going to make this one eletric, but I know I have to learn more about it before attempting such a move. S?P
Never bite off more than you can chew...
Marcus
Marcus
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Very slick. And the lost foam system produces a light wing.
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Hi Marcus,
Will you be using fuse or wing mounted gear?
Mike
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Fuse mounted.
Marcus
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Marcus,
I took the drive over here and I see you haven't made an entry in three weeks.
What's goin?
Charles
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I had to attend some events and was practicing for some contests, but will be back at it by the end of this week.
Then, will stop only when it's finished.
By the way, I got the Enya 61 CXLS to haul this bird...
Will have some new pics soon enough.
Marcus
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Marcus,
Aren't Enya's kinda heavy?
Charles
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Yeah, we keep forgetting they are now getting into their winter time. Hope he did well in his contests.
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Yeah, we keep forgetting they are now getting into their winter time. Hope he did well in his contests.
Fall started today at around 8:22am, local time.
It was 3 events, one after the other, 2 contests and a meeting.
First contest I sucked and the wind sucked even more...
The meeting was a lot of fun.
The second contest, got 3rd place, a medal and lots of new friends.
Charles, the Enya 61 CXLS weights 339 gr, a little over 11oz if my calculation is not wrong.
I'm going to use Randy's header and pipe.
I'm not the expert, but I don't think this engine is that heavy, considering the excellent power output you get.
http://www.youtube.com/watch?v=lo1Bi1Iw00c
This is my friend and "sponsor" Martin doing his thing at Copa Brasil last year.
Thundergazer+Enya 61
Doc, Fall/Winter is actually better than Summer, it doesn't rain very often, the wind is calm and we don't cook under the sun.
I needed to get the engine and some hardware to continue.
It seems I got almost all, only missing 2 sheets of 1/4X4 and will be good to go, but next move is tension/compression relieve and bellcrank/leadouts + center sheeting.
Just curious how you guys bend your horns, since I'll have to do it too.
Any suggestions??
Marcus
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Marcus,
That's not the Enya engines I remember. The ones I'm farmiliar with have a removable front case as the rear backplate, four bolts.
Made for CL?
Looks like a great engine with a light case.
Charles
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Will resume building today, the wing I mean.
But haven't been slacking, got the engine mounts done, bent the flap horn the old way, soldered the BC retainers.
Marcus
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Will resume building today, the wing I mean.
But haven't been slacking, got the engine mounts done, bent the flap horn the old way, soldered the BC retainers.Marcus
Marcus,
Where did you get the two aluminim mounts. They are tapered. You made them?
Charles
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That's the universal mounts Brodak sells.
I had to grind a little to give it the right shape.
I like this kind of mount 'cause it's way easy to change motors...
Marcus
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Wing joiners Ok...
I'll have this wing finished soon.
Next is the center sheeting, easy, then gluing everything while installing the BC.
Marcus
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Center sheeting... Almost there #^ #^ #^
Marcus
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I too like doing the center sheeting like that. Stops those little wrinkles that pop up.
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Post photos...... ;D ;D
As requested...
Happy Easter!!
Marcus
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Marcus,
The sheeting brings a good look to your wings, especially with the pronounced radius'.
That "hook."
What's that all about? Did I miss something?
Charles
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Fishing the leadout... 8)
Marcus
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Fishing the leadout... 8)Marcus
Marcus,
Gotcha!
I thought it was for a bad Vaudeville Act. n~
You ARE moving along at a good pace.
Charles
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Thanks Charles.
Not as fast as I wanted, but it's good to see it coming together.
Marcus
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After some advice from more experienced people, I dropped the clamping and moved on to the regular bolt system.
I have to say it does look "better"...
Marcus
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After some advice from more experienced people, I dropped the clamping and moved on to the regular bolt system.
I have to say it does look "better"...
Marcus
Marcus,
What "Clamping?"
Charles
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(http://imageshack.us/a/img21/9903/20130324122337736.jpg)
(http://imageshack.us/a/img844/2374/20130410184950175.jpg)
Marcus
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Marcus,
I've never seen an installation like that, "clamping."
Good choice.
Charles
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I'll do my best to have this wing finished by yhe end of the weekend.
Marcus
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A little more progress...
Marcus
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I got some tips for my "tips" and thought I could use some of it...
I added a soft balsa block and rough sanded to shape.
I still have some work to do on those tips, but I guess the final result will be worth the work.
Marcus
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I like the way you've done the tips, with no straight rib at the end.
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I like the way you've done the tips, with no straight rib at the end.
Thanks Ash...
Marcus
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I'll do my best to have this wing finished by yhe end of the weekend.
Marcus
Hi Marcus:
Looks like you are making good progress on the wing! I noticed that you are using some sort of material saturated with epoxy to retain the horn to the TE of the wing. May I suggest another method? Use simple (and light) custom cut 1/16 inch thick retainers such as those in the attached photos. They allow you to custom position the horn and then glue the retainers to the wing. They are extremely light and durable.
Later - Bob Hunt
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Hi Bob
Thanks for the "tips" for the tips... ;)
Actually, I borrowed that idea from David F., as I have always used the traditional metal horn retainer, and when I was going to install the horn, I figured I was out... LL~
That is fiberglass+epoxi.
Those look way cool!!
That's why I love this forum. I have learned so much good stuff here...
And you may suggest everuthing you think would help me build it better, anytime you like!!!
Gee, when I come to America, I'm going to have to buy lunch for a lot of people... H^^ H^^ H^^
Marcus
Marcus
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I was trying to decide between take apart or not...
I'll do it take apart, so I had to plan how I was going to build it since this is my first take apart ship.
Now that I've positioned the wing correctly it's gonna go fast.
I should have everything well advanced by the time I get my foam stab/elev...
And gotta buy a long 7/64 hex wrench or something, it is really hard to reach the hex bolts inside the tank compartment...
Marcus
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Marcus,
"Take-apart" to get on an airplane with?
Curious?
How precision is that incidence meter?
Charles
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Well, I borrowed it and to be very honest, i didn't like it very much...
The digital display shows one number then you try it again, it shows another number, like a small variation of 00.1 or 00.2...
When i buy mine, it'll be the one from Robartm which is more "I like it old-school" thing...
But it's better then nothing and there's always the barnyard engineering eyeballing method... LL~ LL~ LL~ LL~ LL~
Marcus
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Well, I borrowed it and to be very honest, i didn't like it very much...
The digital display shows one number then you try it again, it shows another number, like a small variation of 00.1 or 00.2...
When i buy mine, it'll be the one from Robartm which is more "I like it old-school" thing...
But it's better then nothing and there's always the barnyard engineering eyeballing method... LL~ LL~ LL~ LL~ LL~
Marcus
Marcus,
Throw it away. There are better ways than using that and better ways than eye-balling.
What about that bloody take-apart! You going on a Holiday?
Charles
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Been working on the wing saddle and have to do some sanding and stuff, but it's coming out OK.
Have removed the wing a few times and no problems, so I'm glad about it, as I see it, the first time you remove the wing and put it back is the ultimate test to check if one has done a good job. Next one is going to have the two separate panels, which seems to be the best option if you plan to travel and bring the ship along.
And I've got lucky! A friend has a Bob Hunt's masterflight set of stab/elev for the TG and is no longer going to use it, so in a couple of days, I'll have it here...
That is gonna save me a lot of time. A little luck sometimes doesn"t hurt, does it?
Marcus
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The wing building is over, though have to work on the flaps yet.
And I made sure the weight box is on the bottom...
Marcus
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I've done some work on the fuselage top.
Now I have to mold the fuselage top.Pics soon...
Marcus
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A little more done...
Used first 1/32 then 1/16 and layered the fuse top, molding didn't work... HB~>
It's nice to see it shaping up...
Marcus
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Why didn't it work?
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The balsa didn't curve. I used the top bulkheads to try to mold the wood. Not good enough.
You have to have a real mold to get a good piece...
After reading Jose's thread my concept abojt building a fuselage has changed...
Marcus
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You have to soak the wood in hot water and then mold. It takes A grain soft wood to do so.
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I'd like to know how anyone can mold "C" grain balsa. I go for "A" grain, usually 1/32 and two layers with silkspan between.
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I did it Robert, and the balsa was soft enough. The problem is the way I molded it, so I didn't get a good part.
Next one I'll do it the proper way.
Marcus
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I'd like to know how anyone can mold "C" grain balsa. I go for "A" grain, usually 1/32 and two layers with silkspan between.
OOPS
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I just got the foam stab/elev... And CF LG...
Now let me finish this ship...
Marcus
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I just got the foam stab/elev... And CF LG...
Now let me finish this ship...
Marcus
Marcus,
You through for CF landing gear!! Oh my gosh, that stuff is costly.
Looks really good though.
Any other plans for CF? Prop, spinner.
Nice but way out of my league.
Charles
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Unidirectional CF isn't that expensive, and it's fine for LG's and all you need for props. Not a bad idea to put a layer of light fiberglass in the middle of a LG and on the tips of props, to prevent splitting. You can get some from Tower Hobby...look under Dave Brown Products. $6 worth should make a LG. If you need more, I'd go to CST. :o Steve
http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXB964&P=ML (http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXB964&P=ML)
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Funny you should mention that Steve. I'm repairing the LG on the Olympian with some unidirectional CF. It has a crack in the middle which may be the result of loose mounting screws and the 15 or so touchdowns I made on that last official in the wind at the NW regionals. b1 8) BTW: Good info on this thread, Thanks.
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It took me a while, but I've gotthe stab/elev, and they are more advanced than I thought.
Already sheeted and LE and TE installed too.
Now, let me get back to work...
Marcus
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I got the stab almost finished, so all I've had to do was the mount...
Have to shape it a little better and stuff, but the holes are ready.
Marcus
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It's looking really good Marcus! Your plugging away at yours way faster than mine when that was going together.
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Thanks Matt
Gotta get this in the air!
Got my ass kicked last contest by a piped ship... LL~ LL~
And I have to thanks Mr. David Fitzgerald and Mr. Bob Hunt for their help.
You guys are my "heroes"!!
Marcus
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Thanks Matt
Gotta get this in the air!
Got my ass kicked last contest by a piped ship... LL~ LL~
And I have to thanks Mr. David Fitzgerald and Mr. Bob Hunt for their help.
You guys are my "heroes"!!
Marcus
Marcus!!
Are they "The Wind Beneath Your Wings?" LL~ LL~ LL~
I'm just kidding!! Really just kidding!!
Cuz I know you have a sinse of humor. Right? n~
Hey Marcus!
Is that a Photoshop photo or are you realy 5' off the ground inverted? Kudos! I'm still nervous at ten ft. %^
Charles
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The stab saddle is done.
Now gonna work on the removable fuselage/rudder piece.
Already know how I'll hold it in place.
One more step ahead... 8)
Thanks Charles for posting the pic...
Marcus
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What you see in the pics above...
Marcus
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Good Luck with the new ship, Marcus! It won't be long before the sanding begins!
BIG Bear
RNMM/AMM
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Thanks Bill.
Been working on a few reinforcements for the take-apart wing, should finish later today.
There's still some work ahead, bur it's coming out good.
My main concern is adding too much weight, since this ship is intended for contests, so n~ n~
It seems it's going to be a little nose heavy, but let's wait and see.
Now, should I go for monokoted wings and painted fuse/tail??
It ought to speed up finishing a little, and save some weight, I guess...
Marcus
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Depends on how much finish you put on it. I have seen some come out lighter and mucho better looking than the iron ons. Also may help your nose heaviness.
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I've Always heard if you build'em tail-heavy, not good.
My old man used to say 1 gram at the tail equals 10 at the nose...
Don't know if all this hocus pocus is true, I'm trying to get the lightest ship possible and truth is, I've Always f#@* up at the finishing, adding too much stuff in the search for a great look...
I might consider the concept "Rat Rod" for this ship, like no painting, only details and clear....
<My friend Marlus has offered to teach me some basic concepts, so I can go on from there, but I know he's very, very busy, and don't want to bother him.
The idea is that practice makes perfection, so I have saved 2 models to paint before I actually paint this one, they'll give me some practice and if I screw up, I'll do with one of those, my son's ARF Nobler and one ARF Pathfinder, the covering simply came off...
I see Derek, Robert, and the others do it and get amped up to do so too.
Soon I'll be moving this thread to finishing and then, well, then is then... :-\ :-\ :-\
Marcus
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Just a couple pics of the fuselage - wing saddle... needs a few touch ups but almost done for good...
Marcus
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Marcus,
Great so far!
This take apart. For traveling by air? Or because of a small car. Or, easy to ship to me. ;D
Gotta be one of those three.
Charles
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That tailpiece... Does it look like I tore it in two pieces while getting it off, 'cause the guide pin jammed??
SH^ SH^ SH^
Marcus
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That tail is taking shape...
I think I'll take saturday off to build only, no flying.
Marcus
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Following Bob Hunt's Horn Installation Manual...
Cool and easy!
Marcus
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Marcus!
You Rogue you. ;D
Looking really good! Kudos!!
Hard to believe there's foam in there.
Hey! Please run this by me one more time. Exactly why are you building this "take apart" model?
Charles
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Charles
Planning ahead is the key to success.
When I decided on the Thundergazer for contests, I knew i had much to learn, as a builder and as a pilot.
Been practicing hard, and it's been paying off, as I've gotten very good results in contests this year.
So going to contests means traveling and that means spending cash, that is cheaper when more people share the trip.
Putting F2b models and people in compact cars is hard, so everybody has a take-apart here.
But, It also makes it possible to finish this one, and then build a new fuselage, for the eflite 32 I have here, and then being able to fly eletric, without having to build a whole new Bird.
I can also experimente with different stab/elev, like foam, build up or foam/build up and learn from it.
To be very honest, I'm really impressed with Jose's moulded fuselages and might try it too, so it's like having a few chassis and engines and finding the right set up.
I've learned so much in this fórum, and am grateful for it, but the most importante thing I've learned is that we never really actually stop learning.
And there's Always so much to learn...
Marcus
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Almost finished there...
Marcus
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Marcus,
Shaping up!!
Looks like we do our hinges a bit differently?
I may be wrong, and correct me if I am. I see you knoch out the LE of the elevator and not that of the TE of the stab. Correct?
I set mine in 50 50. Half the hinge into the TE and half in the LE.
That's how I was shown. Been doing it that way for over 25 years.
Will you be glassing?
Charles
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I have always done the notch in the leading edge of the elevator. Seems there is less bind that way.
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Tonight will work on the pushrod...
Gotta check how easy it will be to get this ship together (or difficult??!! LL~ LL~)
Can't wait to get my long shaft 7/64 ball driver by Lee... It'll make that a lot easier...
Just a little more...
Marcus
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Working on that pushrod...
I'ld like to show you my friend Mazzarino's work,the 6 oz fuel tank I'll be using. Not a bad deal for 20 bucks...
Marcus
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Hi Marcus,
Like I said at SSW, you're going to have a couple good models to choose from! Good Luck.
BIG Bear
RNMM/AMM
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Thanks again Bill.
The elevator throw... Those corners you know...
Marcus
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It's looking real good Marcus!
Just out of curiosity, how are you attaching the rear of the fuselage to the plane?
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In reality, you will probably only use les than half the throw you are showing.
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Thanks guys.
John, I've run a search and it seems that 20º is enough...
Matt, check the pic... I copied one friend's idea...
Marcus
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After being advised of possible torsion on the horn, I've changed the ball link position...
And drilled another hole on the elev horn...
Marcus
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Thanks guys.
John, I've run a search and it seems that 20º is enough...
Matt, check the pic... I copied one friend's idea...
Marcus
That should work well. I mounted my tail with a screw at a 45 degree angle on the bottom of the fuselage.
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Thanks Ty
I wish all the "planning" I do worked... LL~ LL~
Believe me, it gets exciting too... LL~ LL~ LL~
Marcus
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Me and my big mouth....LOL
So, the new holes didn't work, as the pushrod would hit the stab saddle and not allow the full travel...
Then, plan B... Back to the first holes, but I turned the pushrod around 180º, so the "L" end connects to the flap horn and the ball link to the elev horn.
That should do the trick.
Next time, will get myself some "double" horns...
Marcus
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Almost done with the flaps...
Marcus
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Now, the nose. 1/32 glued, now a layer of CV and then 1/16 over it, as instructed by David F. on the building guidelines.
A doubt, though. What would be the best glue to make this balsa + CV laminate??
Thanks
Marcus
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Now, the nose. 1/32 glued, now a layer of CV and then 1/16 over it, as instructed by David F. on the building guidelines.
A doubt, though. What would be the best glue to make this balsa + CV laminate??
Thanks
Marcus
Hi Marcus,
I prefer Z-Poxy Finishing resin or their 30 minute epoxy, either one spread thin and weighted or clamped.
BIG Bear
RNMM/AMM
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Have run the engine... VD~ S?P
http://www.youtube.com/watch?v=y58NbBP_xHU&feature=youtu.be
Marcus
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Trim tab...
Will be covering soon... Silkspan over SLC.
Marcus
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The right wing panel has SLC on...
Will be doing the left one as soon as I grab something to eat... ;D
Marcus
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The wing is now all covered with SLC, silkspan to come...
Marcus
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Looking good. Now don't forget the scouring pad. Just need to dull the surface.
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Thanks John.
The silkspan is on the bottom, will do the top later.
Marcus
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Marcus,
Could you be so kind as to provide a spread sheet of your builds.
I'm having difficulty following them all.
They "ALL" look good! H^^
Charles
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Marcus,
Could you be so kind as to provide a spread sheet of your builds.
I'm having difficulty following them all.
They "ALL" look good! H^^
Charles
You are very kind Charles, thanks!!
Well, there are 3 models right now, the ARF Nobler rebuilding, the TG and the Magnum.
I love building and what I have learned here in this fórum so far has turned it into a much more enjoyable activity.
Hail Stunthanger!!
Marcus
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Marcus,
You don't have to win contest or build super models to set an example of fine modeling. Ability and more importantly, attitude, you have both.
Your kind words, generousity and great since of humor, not to mention your efforts with descriptive builds as you give back, is outstanding.
A great example you set. H^^
Absolutely a fine modeler and gentleman.
Now get something finished!
Charles
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Thank you Charles.
Now, the top... Nearly ready for final finishing...
Marcus
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That is really nice covering job. Now will find it will take less dope to fill. Also you will have to watch how you sand. As Sparky pointed on one of his finishes, two coats of clear and let set for a day. Then sand and two more coats of clear and let set for a day. When you start getting a little sheen to it you can maybe think of the primer coat.
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Thanks Doc.
What I like about this kind of covering is how stiff the wing gets after the silkspan bonds with the SLC...
No rush now...
Marcus
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Molding the nose sheeting... Gonna get it right this time
Couple of days to dry...
Marcus
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This time I got the molding right!!!! #^ #^
Marcus
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Marcus,
Nice detailed photos, as usual. H^^
However.
I'm at a loss here. No, not my mind. Well possibly. n~
.
That CV is placed over what material? Then you are glueing sheeting over that?
Is the CV doped? Sheeting glued with what adhesive?
Confused a bit, but your model is shaping up.
Charles
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Charles
I'm trying to follow Dave's advice, so first I used 1/32 for a first layer, then I put the CV with a little dope, so it would stay in place, then I molded the top parts using 1/16, and epoxied them in place.
Marcus
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This is my first piped ship.
Gonna work on the pipe tunnel.
Any suggestions??
Marcus
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Working on the pipe tunnel...
Marcus
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Looks good Marcus. My first pipe tunnel I wrapped 1/64 plywood and glued it in with white glue. I would have done it on the next two planes but the design didnt allow me to.
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The fuse top is missing only the canopy...
Marcus
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Looks good Marcus. My first pipe tunnel I wrapped 1/64 plywood and glued it in with white glue. I would have done it on the next two planes but the design didnt allow me to.
Thanks Matt
I still have a lot of work on that area, but it's beginning to take shape.
Marcus
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Well, I should be thankful this happened on the bench....
Marcus
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Marcus
Did the axis break or the glue failed? What kind of glue did you use?
Luiz
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It broke as you see in the pic, and as Always, I used J&B...
Anyway, went to my friend Martin's shop today and borrowed his scale...
Marcus
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The tailwheel...
Marcus
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More molding.... 8) 8) 8)
Marcus
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So, the veil is on... almost time to start a new thread at the finishing board...
Man, I love CV!!!
Marcus
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Now I am only giving constructive criticism. Please don't take it wrong! Do your self a favor and you will thank me in the end. Put the spinner on and re-sand the nose to shape. This is the focal point of the plane and has to be shaped right!
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Will do Robert... Got the 1 3/4 three-blade spinner last Friday.
So now I can shape it good!!!
Got some 13X3.75 BE CF props, and Marlus will help me get them ready for action.
Will post more pics later....
Marcus
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Adjusted the matching of the tailpiece and the bottom is basically ready.
Tomorrow I will shape the nose...
A few more clicks and it'll be ready for finishing... Can't wait! #^ #^
Marcus
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Haven't shaped the nose yet, but it's on its wheels...
Marcus
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I've sprayed some dope on the wings...
Finishing on the way...
Marcus
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"The Mark" of Excellence,
Marcus,
You must have strapped the wing in so it wouldn't move around?
I see your CF 3-blade. Where did that come from? Size? Gear also, same place?
Model is comming together and looking good. Paint is just around the corner.
Charles
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Actually no i didn't Charles, it's hanging there 'cause the smell, wife and dope, not good friends... n1
The CF 3-blade is Brian Eather's, 13X3.75. The LG is by my friend Osni.
Just a few more details.... It's been hard, but I'll accomplish this in great style!!!
Marcus
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A work in progress... ;)
Marcus
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Looks good. Should be a cool plane.
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Is this what it's supposed to be like after sanding?
It fills much easier than silkspan and sands even easier #^ #^ #^ #^ #^
Marcus
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Still in progress.... S?P
Marcus
-
Getting there.... ;)
Marcus
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The engine cowl... Let's see where this is going...
Marcus
-
Done some sanding...
Marcus
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Marcus,
"The "Mark" of excellence!"
When you hollow out, how do you guage? I try to get so thin, I always go through in one or two areas. One guy told me he holds it up to a light. n~
Is that other piece planked? Is that planking?!
Charles
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Yeah, it happens with me too....LOL
That is the pipe cover, and I molded it.
Molding is nice when you get it done properly... ;D
Marcus
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I remember one of the tapes that Windy used to do, he said if we didn't go thru to the surface while hollowing a block once in a while, we were not going thin enough. He also showed using a light bulb to see the light showing thru the balsa.
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It's beginning to look like something....
Marcus
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I'm gonna roll in style!!!
These rock!!!
Thank you Robert and Tom!!!
Marcus
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The "Mark" of excellence!
WOW! Nice.
Size?
Weight?
Available from?
Charles
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Charles
They're available thru Stunt Hanger... Just go to the online shop and click on wheels.
I got 2 1/2".
I don't know the weight, but they're light....
Plus the fact that they do look good.... Won't need wheelpants.... 8) 8)
Marcus
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http://stunthanger.com/hobby//index.php?cPath=42&osCsid=b7ce9bcb6ae1953dc645410323d9b431
Marcus
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The "Mark" of excellence,
Took a look,
Sparky has some great offerings.
Those wheels are to small.
You build big models with small wheels, I build small models with large wheels.
I have no idea what that means, or if it's true. n~
MARCUS!!
Get something finished!
Charles
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Charles
Actually, I'm spending time practicing for the Brazilian Championship, two weeks from now.
As next year I'll move up to Expert, it means that, for a very long time, this championship will be my last chance of winning... LL~ LL~
But I'm very close to finishing this ship... It's pouring today, so my practice got screwed...
Gonna have something for you.... ;)
Marcus
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The "Mark" of excellence.
Kudos on your compitition progress! CLP**
Marcus, come a bit closer, I have to wisper and I don't want anyone else to hear this. ;D
I have known guys that compete in classes well below their abilities. You can collect trophies quick this way. n1
To bad about the rain. Two weeks can go by really quick when the days are limited because of the weather.
What model/models are you competing with?
Charles
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Gonna use my Legacy/ST60...
So, I wasn't lazy at all today, in spite of a rainy afternoon that was calling for a nice nap... Z@@ZZZ
Now, I have to hollow the engine cowl and shape the intakes.
Well, like the song: "It's a long way to the top if you wanna rock'n'roll..."
It's been a long way, but it's been fun, and I'm happy I haven't screwed up yet... LL~ LL~ LL~ LL~
Then again, finishing is coming... :-\ :-\
Marcus
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Looks good Marcus! Really like the canopy shape.
One comment for future builds. Tape Around where you are going to put the filler, so that it will give you a clean edge once you get it all set up the way you want. Then you pull the tape off and get a nice edge. Also I like to take my finger and in one continuous motion run down the filler and get rid of any excess that there is before I pull the tape off.
Just a suggestion
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Thanks Matt
I did tape it! I must have done some bad taping then..
But on the right side there was a "gap" due to a broken edge HB~> and I thought of using the superfil to solve the problem. I might have to touch it up though...
I'm happy you liked the canopy, took me the whole afternoon to get it shaped the way I wanted..
There are two things I can't go without anymore, SLC and Superfil... OK 3 things, there's the carbon veil too... ;D
Marcus
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Thanks Matt
I did tape it! I must have done some bad taping then..
But on the right side there was a "gap" due to a broken edge HB~> and I thought of using the superfil to solve the problem. I might have to touch it up though...
I'm happy you liked the canopy, took me the whole afternoon to get it shaped the way I wanted..
There are two things I can't go without anymore, SLC and Superfil... OK 3 things, there's the carbon veil too... ;D
Marcus
Oh I see, I didn't realize that extra amount on the top was to fill a gap.
Super fil is so much better than epoxy-lite that I was previously using for fillets and such.
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Yeah, superfil is the best!!
I use the firger trick when using epóxi+microballoons.
Superfil sands easy, no biggie...
The only thing is I always end up mixing more (much more... HB~>) than I really need... LL~ LL~ LL~ LL~ LL~
Marcus
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I'm tired today...
But it was worth it...
Marcus
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Now I am only giving constructive criticism. Please don't take it wrong! Do your self a favor and you will thank me in the end. Put the spinner on and re-sand the nose to shape. This is the focal point of the plane and has to be shaped right!
Started yesterday, gonna finish today...
Hope to get it right!
Marcus
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I'm tired today...
But it was worth it...
Marcus
The "Mark" of excellence!
I'm tired every day. Z@@ZZZ
Hey Mark! You really like that "blue goo?"
Charles
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Gents
It's my great pleasure to inform you that the building phase of my Thundergazer can be considered over.
I put the ship all together and wento to the bakery on the corner to weight it.
What you see in the pics weighted aroun 54 oz.
I say around because I couldn't really lay the model on the scale, had to hold it up with the spinner on the scale, but good enough to have na idea of where i'm standing.
Considering that I've already applied the veil to the stab/elev and the wing has a few coats of dope already, maybe, just meybe I'll reach my goal of 62/63 oz tops, if lighter, better...
Let's see if I can keep myself from screwing up at the finishing this time...
My ships get a little "fat" somehow.... LL~
Thanks to everybody who has seen this thread.
Time to move to the finishing board. See you there..... ;D
Marcus
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Just remember the sandpaper and go light with the trigger finger on the spray gun. Looks great as it sits.
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Just remember the sandpaper and go light with the trigger finger on the spray gun. Looks great as it sits.
Yeah Doc, the itchy trigger finger... LL~ LL~
The plan is to have it painted one color only and a few stickers for decoration.
But it must be shiny and smooth, and light enough.
Well, let's do this!
Master Yoda says: "Try not. Do or do not."
May the force be with me!! ;D
Marcus
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I think this may come out lighter than mine did. My Thundergazer is in the 65oz range, but it's not hurting at that weight, that's for sure.
Here's a pic of inspiration to get going on the finish! >:D
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Did you miss me??
Well, after certain consideration, I decided to modify the shape of the engine cowl to allow a better cooling.
I've seen lots of pics of different ships, and thought mine to be not large enough.
I'll soon be done with my son's Nobler, and able to spend te rest of my vacation time working on finishing this baby.
Marcus
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I hope you have a lot bigger opening for the hot air to get out. And isn't it great to get things done with the younger ones.