Q-40 Racing Discuss AMA 422 and any other variants of Quarter 40 racing

Q40 Foam wing

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Old 03-04-2008, 07:44 PM
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B.P.R.
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Default Q40 Foam wing

A friend asked me if it is possible to make Q40 Foam wings .........I answered "Yes you can" ..but I do not have any photos or document..............Please , Someone knows something link or build log thred ?
Thanks
Paolo P.
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Old 03-04-2008, 09:18 PM
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Default RE: Q40 Foam wing

It is very possible to produce a Q-40 with a foam wing.

I recently built one of Matney Models Napier. Kevin is the owner. I am now building one of his AJ-2.

Napier construction is shown on a forum in Pylon Universe.

I just started another construction forum on the AJ-2. The AJ 2 forum is on the NMPRA site.



Below is a link on Matney Models:

http://www.matneymodels.com/qm.html
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Old 03-05-2008, 02:31 PM
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Default RE: Q40 Foam wing


ORIGINAL: sahartman21

It is very possible to produce a Q-40 with a foam wing.

I recently built one of Matney Models Napier. Kevin is the owner. I am now building one of his AJ-2.

Napier construction is shown on a forum in Pylon Universe.

I just started another construction forum on the AJ-2. The AJ 2 forum is on the NMPRA site.



Below is a link on Matney Models:

http://www.matneymodels.com/qm.html
Thanks of info..

I Looking specifically link (in Forums or web ) where you can see building the Q40 foam wing ....Strengthen , paste, paint ecc...
Ciao Paolo P.
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Old 03-05-2008, 02:35 PM
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Default RE: Q40 Foam wing

Yes.......i have see now in NMPRA forum the aj2 build log
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Old 03-05-2008, 03:55 PM
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Default RE: Q40 Foam wing

Paulo,
I think the AJ-2 build is going to be powered with a Thunder Tiger enging, so the wing probably won't be built strong enough for a Nelson. With a proper spar, carbon fiber, and other reinforcements, I'm sure a foam wing can be built strong enough, although I've always used molded wings in Q40.
Gary
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Old 03-05-2008, 04:30 PM
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Default RE: Q40 Foam wing

Does anyone have one of Lyles old videos of him doing a wing for Formula 1?

I think I have a copy somewhere, but not sure I could find it.

I think that might show Paulo some good techniques, but if I remember right, Lyle didn't believe in using CF strips on the spar at that time. I rember him holding up a metal ruler and showing how it would flex and bend, and that CF would do the same??

Still had some good stuff in it.

Would love to see a video of Terrence or Chuck laying up a complete Neme or Vortex.
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Old 03-05-2008, 05:41 PM
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Default RE: Q40 Foam wing

Paulo,

The wing construction photos that are on the site are from an AJ that is currently being flown with a Jett SS.

1) The wing has carbon fiber on both the top and bottom.
2) The wing is joined with three 2 ounce layers of glass.

My Napier is currently being flow with a Thunder Tiger Pro 40. At least initially the AJ 2 will also have the same motor.

Kevin is flying his models with high powered Q-40 engines. I would think that if care is done during construction that another could also be flown with a new Jett or Nelson.

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Old 03-05-2008, 05:47 PM
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Default RE: Q40 Foam wing


ORIGINAL: garys

Paulo,
I think the AJ-2 build is going to be powered with a Thunder Tiger enging, so the wing probably won't be built strong enough for a Nelson. With a proper spar, carbon fiber, and other reinforcements, I'm sure a foam wing can be built strong enough, although I've always used molded wings in Q40.
Gary
Yes , i know....
Years ago i make many foam wing , also for F3D ...... often teach to friend the techniques it is easier with photos..
I wanted to try something ready(forum or web-site) for Italian friends who want to build Q40 foam wing....Especially for beginners who want to spend little money

PP
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Old 03-05-2008, 05:54 PM
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Default RE: Q40 Foam wing


ORIGINAL: sahartman21

Paulo,

The wing construction photos that are on the site are from an AJ that is currently being flown with a Jett SS.

1) The wing has carbon fiber on both the top and bottom.
2) The wing is joined with three 2 ounce layers of glass.

My Napier is currently being flow with a Thunder Tiger Pro 40. At least initially the AJ 2 will also have the same motor.

Kevin is flying his models with high powered Q-40 engines. I would think that if care is done during construction that another could also be flown with a new Jett or Nelson.

OK
I follow also your link on NMPRA
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Old 03-05-2008, 08:00 PM
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Kevin Matney
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Default RE: Q40 Foam wing

I have DVD full of pics on how to make a wood for Q/40. I give them to he who buy my kits. Done right a wood wing is as good any full composites wing may be better.
some pic to come later.
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Old 03-05-2008, 11:30 PM
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Default RE: Q40 Foam wing

Carbon fiber on the top skin is wasted, since it does little in compression. The balsa skin (3/32") does that function quite well.

The three layers of 2 oz glass with staggered widths on the center is good, much better than a single layer of 6 oz cloth since it prevents forming a stress concentrater. On each layer, make the width double on the leading edge as the trailing edge.
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Old 03-06-2008, 07:24 AM
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Default RE: Q40 Foam wing

I have always built my own foam wings for Q40 and Q500. I have always kept the weight of the airplane to within a couple of ounces of the minimum. None have ever failed.

All of the wings in the picture are foam core wings.

Ed S
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Old 03-06-2008, 10:04 AM
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Kevin Matney
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Default RE: Q40 Foam wing

But if you use carbon as a vertical spar and carbon on the bottom for tension they work great.
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Old 03-06-2008, 01:42 PM
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Default RE: Q40 Foam wing

Pretty much what I do Kevin. I use vertical spar, 1/8 lite ply with carbon tow on either side.

Ed S
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Old 03-06-2008, 06:00 PM
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Default RE: Q40 Foam wing

.....[sm=thumbs_up.gif] It's Interesting
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Old 03-17-2008, 02:59 PM
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Default RE: Q40 Foam wing

this some more of what I do.
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Old 03-17-2008, 03:30 PM
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Default RE: Q40 Foam wing

Kevin - are the marks in your last two pics so you can sand a straight LE and/or TE?
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Old 03-18-2008, 05:27 PM
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Default RE: Q40 Foam wing

this is my test for fist foam/wood Vendetta Wing
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Old 03-18-2008, 06:26 PM
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Default RE: Q40 Foam wing

Sanding in the TE
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Old 04-28-2008, 09:06 AM
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Default RE: Q40 Foam wing

Joined and wing mounts added.
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Old 05-21-2008, 09:25 PM
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Default RE: Q40 Foam wing

Here is some more pics.
Added 3 layers of 2 oz fiberglass to CC 2" 6" 12"
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Old 06-05-2008, 11:27 PM
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Default RE: Q40 Foam wing

I posted some vacuum bagging pictures on the NMPRA site.

Check out the AJ-2 construction.
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Old 06-06-2008, 05:26 PM
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Default RE: Q40 Foam wing

Try this link [link=http://www.nmpra.org/phpBB2/viewtopic.php?f=1&t=1677&p=11673#p11673]AJ-2 construction From NMPRA[/link]
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Old 07-18-2008, 08:00 AM
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Default RE: Q40 Foam wing

In the Lyle Larson video, F1 No Secrets, he uses bass wood for the spar. He was taking those inexpensive yard sticks that hardware stores give away or sell for very little and planning them down as a spar with a Black & Decker planner to 1/16" thick. He cut them in 1/2 for 18" spar in each wing half, glued with Tite-Bond. He did not use carbon fiber and thought it added nothing to the strength over his less expensive techniques. The skins were set to the cores using Tite-Bond, no epoxy.

The wing balsa skins are covered top and bottom with fiber glass using polyester resin.

About the only real reason to go to molded wings over foam ones is the gain in consistency with a mold. Foam wing airfoils will vary from one to another due to many factors and a slight difference in the airfoil of even 1/128" at any point will change the various coefficients making some wings do better than others even though the cores are cut from the same templates. Doing a wing from foam cores reminds me of the surf board shaping masters; there were a lot of surf board makers, but only a few of them made really great custom boards.

Lyle should resurrect his video. It had a lot of good building tips that were applicable to model building in general as well as Q40.

Stan D.

"Whether you believe you can or you can't, either way you are right." Henry Ford
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Old 10-11-2008, 07:42 PM
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Default RE: Q40 Foam wing

kevin where can i see or watch here , how to make the q 40 wing?? also i want to know or see step by step the way to do ailerons or the way you do the ailerons.
thanks
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