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Author Topic: Lost Foam Jig: my first time  (Read 32696 times)

Offline john e. holliday

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Re: Lost Foam Jig: my first time
« Reply #100 on: March 28, 2013, 09:07:09 AM »
I too like doing the center sheeting like that.   Stops those little wrinkles that pop up.   
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #101 on: March 28, 2013, 05:06:51 PM »
Quote from: RandySmith on February 13, 2013, 01:44:39 PM
Post photos......  ;D ;D

As requested...
Happy Easter!!

Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #102 on: March 28, 2013, 05:17:23 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #103 on: March 28, 2013, 05:35:29 PM »
Fishing the leadout... 8)

Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #104 on: March 28, 2013, 06:11:29 PM »
Quote from: MarcusCordeiro on March 28, 2013, 05:35:29 PM
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #105 on: March 29, 2013, 05:17:55 AM »
Thanks Charles.
Not as fast as I wanted, but it's good to see it coming together.

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #106 on: April 10, 2013, 04:02:39 PM »
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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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #107 on: April 10, 2013, 05:17:17 PM »
Quote from: MarcusCordeiro on April 10, 2013, 04:02:39 PM
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #108 on: April 10, 2013, 05:38:38 PM »






Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #109 on: April 10, 2013, 05:57:02 PM »
Marcus,

I've never seen an installation like that, "clamping."

Good choice.

Charles
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #110 on: April 18, 2013, 03:47:05 PM »
I'll do my best to have this wing finished by yhe end of the weekend.

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #111 on: April 19, 2013, 08:14:06 PM »
A little more progress...

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #112 on: April 22, 2013, 03:51:18 PM »
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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Offline ash

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Re: Lost Foam Jig: my first time
« Reply #113 on: April 22, 2013, 05:18:13 PM »
I like the way you've done the tips, with no straight rib at the end.
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #114 on: April 22, 2013, 06:42:18 PM »
Quote from: ash on April 22, 2013, 05:18:13 PM
I like the way you've done the tips, with no straight rib at the end.

Thanks Ash...

Marcus
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Offline Bob Hunt

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Re: Lost Foam Jig: my first time
« Reply #115 on: April 23, 2013, 05:52:35 AM »
Quote from: MarcusCordeiro on April 18, 2013, 03:47:05 PM
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #116 on: April 23, 2013, 06:41:23 AM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #117 on: April 30, 2013, 05:31:26 PM »
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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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #118 on: April 30, 2013, 07:14:37 PM »
Marcus,

"Take-apart" to get on an airplane with?

Curious?

How precision is that incidence meter?

Charles

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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #119 on: April 30, 2013, 07:19:42 PM »
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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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #120 on: April 30, 2013, 07:42:10 PM »
Quote from: MarcusCordeiro on April 30, 2013, 07:19:42 PM
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #121 on: May 09, 2013, 07:31:38 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #122 on: May 16, 2013, 03:59:59 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #123 on: May 22, 2013, 04:21:59 AM »
I've done some work on the fuselage top.
Now I have to mold the fuselage top.Pics soon...

Marcus
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #124 on: May 24, 2013, 08:22:20 PM »
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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Offline Randy Powell

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Re: Lost Foam Jig: my first time
« Reply #125 on: May 24, 2013, 08:58:05 PM »
Why didn't it work?
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #126 on: May 24, 2013, 10:00:20 PM »
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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Offline RC Storick

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Re: Lost Foam Jig: my first time
« Reply #127 on: May 26, 2013, 05:36:17 PM »
You have to soak the wood in hot water and then mold. It takes A grain soft wood to do so.
« Last Edit: May 27, 2013, 08:18:10 AM by Robert Storick »
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Offline FLOYD CARTER

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Re: Lost Foam Jig: my first time
« Reply #128 on: May 26, 2013, 06:07:33 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #129 on: May 27, 2013, 07:27:30 AM »
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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Offline RC Storick

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Re: Lost Foam Jig: my first time
« Reply #130 on: May 27, 2013, 08:18:43 AM »
Quote from: FLOYD CARTER on May 26, 2013, 06:07:33 PM
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #131 on: June 01, 2013, 09:39:09 PM »
I just got the foam stab/elev... And CF LG...
Now let me finish this ship...

Marcus
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Offline Avaiojet

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Re: Lost Foam Jig: my first time
« Reply #132 on: June 02, 2013, 12:26:26 PM »
Quote from: MarcusCordeiro on June 01, 2013, 09:39:09 PM
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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Offline Steve Helmick

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Re: Lost Foam Jig: my first time
« Reply #133 on: June 03, 2013, 10:54:02 PM »
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
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Offline Balsa Butcher

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Re: Lost Foam Jig: my first time
« Reply #134 on: June 04, 2013, 12:36:18 PM »
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.
« Last Edit: June 04, 2013, 04:34:01 PM by Balsa Butcher »
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #135 on: June 04, 2013, 07:37:02 PM »
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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Re: Lost Foam Jig: my first time
« Reply #136 on: June 06, 2013, 07:29:50 AM »
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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Offline Matt Colan

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Re: Lost Foam Jig: my first time
« Reply #137 on: June 06, 2013, 07:38:34 AM »
It's looking really good Marcus! Your plugging away at yours way faster than mine when that was going together.
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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #138 on: June 06, 2013, 07:45:09 AM »
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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Re: Lost Foam Jig: my first time
« Reply #139 on: June 07, 2013, 07:30:03 AM »
Quote from: MarcusCordeiro on June 06, 2013, 07:45:09 AM
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #140 on: June 07, 2013, 03:31:43 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #141 on: June 08, 2013, 03:56:58 PM »
What you see in the pics above...

Marcus
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Offline Bill Little

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Re: Lost Foam Jig: my first time
« Reply #142 on: June 08, 2013, 04:42:16 PM »
Good Luck with the new ship, Marcus!  It won't be long before the sanding begins!

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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #143 on: June 11, 2013, 07:34:06 AM »
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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Offline john e. holliday

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Re: Lost Foam Jig: my first time
« Reply #144 on: June 11, 2013, 08:49:57 AM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #145 on: June 11, 2013, 11:37:13 AM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #146 on: June 11, 2013, 02:49:11 PM »
Just a couple pics of the fuselage - wing saddle... needs a few touch ups but almost done for good...

Marcus
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Re: Lost Foam Jig: my first time
« Reply #147 on: June 11, 2013, 06:37:00 PM »
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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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 #148 on: June 26, 2013, 09:03:20 PM »
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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Offline MarcusCordeiro

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Re: Lost Foam Jig: my first time
« Reply #149 on: June 27, 2013, 08:15:21 PM »
That tail is taking shape...
I think I'll take saturday off to build only, no flying.

Marcus
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