Balsa flat plate wings - RCCanada - Canada Radio Controlled Hobby Forum
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Old 12-14-2005, 12:17 PM   #1
I am: Boolean21
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Balsa flat plate wings

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I'm looking at doing a sport-scale electric of the SAAB J-21 WW2 Swedish fighter (may do the jet version as a secon build).

I'm thinking of using the flat-plate balsa wing instead of the built-up structure, and would appreciate pointers on how wide I can go before I have to start thinking of using FG strapping tape, basswood inserts, or CF tubing for spars. Also, hints on using same.

I'm not intending to build a rocketship.

Not much information, except for the Bob-e-cat and similar items.

Thanks in advance!

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Old 12-24-2005, 12:21 AM   #2
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I am: Moe N.
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Flat Plate Wings

My own experiment with flat plate wings was a short lived, but succesful flyer, I built a 36 inch "mini Kangaroo" from the free plan in in the August 2005 edition of RC Model World. Here is a pic from a British site of one,
I powered it with a GMS 47, not electric. The plane was very fast, call it scary fast if you want. The plane suffered from a rather hard collision with a spruce tree when I over flew our runway inverted and lost orientation momentarily, the recovery was too little too late. The plane had six successful flights up to that point. I'll probably build a second one after I finish building my electric powered "Loyalist" and "Alpha Jet". Both came from Oilmans stable, your can view them at
The Loyalist is covered and awaiting the instalation of the flight control components, the Alpha Jet is sitting on the building board awaiting my attention
I have some GWS ducted fans and want to build an own design 46 in. span twin EDF powered flat plate flying wing, but that project will have to wait till later in the winter.
Salutations from the Pacific North WET!

S.P.A.D.s, Fibreglas & Balsa EDF's, Foamies, Brushless powered and nitro balsa planes, they're all in my hanger, just don't explain what it all means to the mrs, eh?
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Old 01-03-2006, 11:40 AM   #3
I am: Boolean21
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Wood chips are flying!

I've started the build....
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Old 01-03-2006, 08:49 PM   #4
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I am: Terry L
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Flat plate wings

Small models do well with flat plate, mostly because of their simple build, low drag, and ease of repair. Personally, I take it a step further and go to Jedelsky; more lift without giving up any of the other benefits. There is no need to follow Jedelsky exactly, as long as there is some "camber" in there.

Remember, flat plate=speed, which is why small c/l models with flat plate can turn you into a posthole digger...
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Old 01-03-2006, 09:43 PM   #5
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Posty holes in the sky

Ron Laden's done a super desing -- the PushyCat, published as a free plan in Q&EFI (for some reason, not carried in Canada by any hobby shop or magazine dealer in the GTA).
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