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Author Topic: Lost Foam Jig: my first time  (Read 32299 times)

Offline MarcusCordeiro

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Lost Foam Jig: my first time
« on: December 26, 2012, 06:30:12 PM »
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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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #1 on: December 26, 2012, 06:55:04 PM »
Marcus,

Nice choice! Kudos.

Good size model.

RSM has a kit I'm eyeballing.

Charles
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #2 on: December 29, 2012, 06:32:10 PM »
Cutting the ribs was fun!! ;)

Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #3 on: December 31, 2012, 10:00:22 AM »
Cutting the ribs was fun!! ;)Marcus

Marcus,

You're slacking.   n1

Get more done and post!

Charles
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #4 on: December 31, 2012, 12:54:45 PM »
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~

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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #5 on: December 31, 2012, 01:03:09 PM »
Marcus,

Was it you who said you had no local hobby shop and had to get everything by mail?

Charles
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #6 on: December 31, 2012, 03:03:02 PM »
No, we have many hobby shops around, only some don't carry control line.


Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #7 on: January 01, 2013, 06:45:25 AM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #8 on: January 01, 2013, 12:24:42 PM »
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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Offline Bill Little

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Re: Lost Foam Jig: my first time
« Reply #9 on: January 01, 2013, 01:19:15 PM »
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
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Offline RandySmith

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Re: Lost Foam Jig: my first time
« Reply #10 on: January 01, 2013, 02:13:06 PM »
Cutting the ribs was fun!! ;)

Marcus


LOL that's  why we do this !!

Randy

Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #11 on: January 01, 2013, 04:45:29 PM »
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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Offline Bill Little

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Re: Lost Foam Jig: my first time
« Reply #12 on: January 01, 2013, 04:57:55 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #13 on: January 01, 2013, 11:09:29 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #14 on: January 08, 2013, 06:10:19 AM »
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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Offline Bill Little

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Re: Lost Foam Jig: my first time
« Reply #15 on: January 08, 2013, 08:38:24 AM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #16 on: January 08, 2013, 11:55:20 AM »
I've had me some fun!!

Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #17 on: January 08, 2013, 12:37:11 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #18 on: January 08, 2013, 02:36:35 PM »
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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Offline Will Hinton

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Re: Lost Foam Jig: my first time
« Reply #19 on: January 08, 2013, 03:25:34 PM »
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.
John 5:24   www.fcmodelers.com

Offline Bill Little

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Re: Lost Foam Jig: my first time
« Reply #20 on: January 08, 2013, 04:10:55 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #21 on: January 08, 2013, 04:37:24 PM »
Thanks guys

I'm done for today, been working on that wing for 10 hours!!
Fun, fun, fun :)! :)! :)!

Marcus
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Offline Doug Moon

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Re: Lost Foam Jig: my first time
« Reply #22 on: January 09, 2013, 12:35:14 PM »
That wing looks great!
Doug Moon
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #23 on: January 09, 2013, 09:07:12 PM »
That wing looks great!

Thank you Doug

Tomorrow I'm going to work on the TE shearwebs...

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #24 on: January 10, 2013, 05:20:29 PM »
TE Shearwebs done!!
Now I have to prepare the molded LE.


Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #25 on: January 11, 2013, 06:25:11 AM »
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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Online Bob Hunt

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Re: Lost Foam Jig: my first time
« Reply #26 on: January 11, 2013, 07:48:53 AM »
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

Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #27 on: January 11, 2013, 07:56:54 AM »
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
Trump Derangement Syndrome. TDS. 
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If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #28 on: January 11, 2013, 08:17:49 AM »
The lost foam jig takes wing building to another level!!
Simple as that.

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #29 on: January 21, 2013, 07:02:49 PM »
Not that kind of great news but I'm back at it...

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #30 on: January 22, 2013, 02:29:23 PM »
The sheeting is ready for moulding.
Let's warm up that water #^ #^

Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #31 on: January 22, 2013, 06:01:50 PM »
Marcus,

Do you board sand both sides of that sheeting? CA to join?

1/16" sheeting?

Charles
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #32 on: January 22, 2013, 07:56:06 PM »
I only sand the outside.
Yes, CA for joining and 1/16.

Marcus
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Re: Lost Foam Jig: my first time
« Reply #33 on: January 23, 2013, 09:14:04 AM »
Marcus,

Span of that model? Please.

Charles
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #34 on: January 23, 2013, 09:17:16 AM »
60 3/4" and 630 square inches of area... S?P

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Re: Lost Foam Jig: my first time
« Reply #35 on: January 23, 2013, 09:31:57 AM »
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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Re: Lost Foam Jig: my first time
« Reply #36 on: January 23, 2013, 10:01:46 PM »
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!
Matt Colan

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Re: Lost Foam Jig: my first time
« Reply #37 on: January 24, 2013, 12:26:05 PM »
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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Re: Lost Foam Jig: my first time
« Reply #38 on: January 24, 2013, 03:35:15 PM »
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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Re: Lost Foam Jig: my first time
« Reply #39 on: January 24, 2013, 06:43:32 PM »
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
Trump Derangement Syndrome. TDS. 
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If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

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Re: Lost Foam Jig: my first time
« Reply #40 on: January 25, 2013, 05:54:25 AM »
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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Re: Lost Foam Jig: my first time
« Reply #41 on: January 25, 2013, 08:28:52 AM »
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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Re: Lost Foam Jig: my first time
« Reply #42 on: January 26, 2013, 02:15:40 PM »
Back at it.
Left panel almost there... :)!

Marcus
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Re: Lost Foam Jig: my first time
« Reply #43 on: January 28, 2013, 07:29:45 AM »
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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Re: Lost Foam Jig: my first time
« Reply #44 on: January 28, 2013, 09:30:04 AM »
Marcus,

Nice?

1/16" or 3/32" sheeting?

Charles
Trump Derangement Syndrome. TDS. 
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Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

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Re: Lost Foam Jig: my first time
« Reply #45 on: January 28, 2013, 09:26:35 PM »
It's 1/16, but next wing I'll go with 3/32...

Marcus
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Re: Lost Foam Jig: my first time
« Reply #46 on: January 29, 2013, 10:35:29 AM »
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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"There's no try. Do or Do not." - Master Yoda

"Wealth and fame, he's ignorant
Action is his reward, look out
Here comes Marcus, man..."

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Re: Lost Foam Jig: my first time
« Reply #47 on: January 29, 2013, 07:45:32 PM »
Marcus,

Looking really good!

Get anything new in the mail?

Charles
Trump Derangement Syndrome. TDS. 
Avaiojet Derangement Syndrome. ADS.
Amazing how ignorance can get in the way of the learning process.
If you're Trolled, you know you're doing something right.  Alpha Mike Foxtrot. "No one has ever made a difference by being like everyone else."  Marcus Cordeiro, The "Mark of Excellence," you will not be forgotten. "No amount of evidence will ever persuade an idiot."- Mark Twain. I look at the Forum as a place to contribute and make friends, some view it as a Realm where they could be King.   Proverb 11.9  "With his mouth the Godless destroys his neighbor..."  "Perhaps the greatest challenge in modeling is to build a competitive control line stunter that looks like a real airplane." David McCellan, 1980.

Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #48 on: January 30, 2013, 01:33:37 AM »
No, not that I know. The panels are glued.
It looks like I'll be finishing soon..

Marcus
Live to fly, fly to live
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"There's no try. Do or Do not." - Master Yoda

"Wealth and fame, he's ignorant
Action is his reward, look out
Here comes Marcus, man..."

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Re: Lost Foam Jig: my first time
« Reply #49 on: January 30, 2013, 12:35:26 PM »
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
Live to fly, fly to live
Aces High!

"There's no try. Do or Do not." - Master Yoda

"Wealth and fame, he's ignorant
Action is his reward, look out
Here comes Marcus, man..."


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