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Vertical crutch design

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Old 02-09-2012, 01:08 PM
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AmishWarlord
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Default Vertical crutch design


Anyone ever design and build a vertical crutch plane?

Now I'm not talking about clam shell design where you make two halves and glue them together. That is different.

I was thinking today about a vertical crutch structure that incorporates the vertical stabilizer. The fuselage formers would then be placed on the sides of the crutch and sheeted.

I think I'll try this with a 40 size plane and see how it works out.

I can envision that the engine mount, wing saddle, landing gear mounts, fuel tank compartment, and servo installation will be a challenge.

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Old 02-09-2012, 01:16 PM
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Default RE: Vertical crutch design

Sig had a series of planes way back in the day like that. I think they called it a quick build????? It was a profile fuse with molded ABS clam shells to make it look pretty.
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Old 02-09-2012, 01:31 PM
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Default RE: Vertical crutch design

In my collection of kits, yet to be built I have a Sig Kwik-Bilt P-51D Mustang. Its a 64" wingspan .60 sized using a solid balsa vertical crutch with clam shell sides and a foam core wing. I will take pic's and attach if interested.
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Old 02-09-2012, 01:37 PM
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Default RE: Vertical crutch design

Yeah, I was looking at how a profile plane's crutch carried all the load and gear so the outside shape could be built lighter.

Having the core of the vert stab being an intrical part of the fuse crutch would save the weight of connecting it separate. It would be stronger also, not that I haven't had a long list of tail sections left after crashes.
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Old 02-09-2012, 01:41 PM
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Default RE: Vertical crutch design

I get the idea Luft, pics will not be necessary.

Thanks though.

I'm planning on a built up structure.
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