Flying wing as cheap and simple option for basic fun flying.

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Sockmonkey

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This would be minimal if you had a tricycle gear, wheel pants, and the main gear at or even behind the prop.
I think putting them behind the prop would move them to far aft of the CG.
Wouldn't hurt ground handling, but more often than not, you're gonna be slamming the nose gear down when landing.

So what's the easiest way to make some quick and dirty aftermarket plug-in Hoener tips for this bad boy?
 

Victor Bravo

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The same way that all of the glider wingtip extensions are done. A stub spar sticking out the root end of the tip extension. Reinforced ribs that have receptacles for the pins at the root rib of the extension, and a receptacle for the pin at the end of the tip spar.
 

Sockmonkey

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The same way that all of the glider wingtip extensions are done. A stub spar sticking out the root end of the tip extension. Reinforced ribs that have receptacles for the pins at the root rib of the extension, and a receptacle for the pin at the end of the tip spar.
Oh, I wasn't asking about how to attach them. Thank you though.
I'm asking about a cheap and easy way to make the things.
Like would it be doable to carve them out of foam or balsa to get that shape without needing a C&C machine.
 

Sockmonkey

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Aesquire

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Reasonable simple end plates aren't optimum, but can be multipurpose & worth the weight.

Assuming a plank style rectangular or tapered wing, you can get tip skids to protect the wing, more yaw stability, and some tip vortex control for little extra weight and drag.
 

Sockmonkey

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Reasonable simple end plates aren't optimum, but can be multipurpose & worth the weight.

Assuming a plank style rectangular or tapered wing, you can get tip skids to protect the wing, more yaw stability, and some tip vortex control for little extra weight and drag.
Yeah, it's really those tip losses I'm concerned about. At this AR, some sort of tip structure is pretty important.
 

Victor Bravo

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Erkki, do yourself (and all of us) a very big favor. Get some cheap foam and packing tape, and start making R/C models of these various configurations that are of interest.

Make the models about 2 meters in span to reduce the "scale effect" errors to a reasonable level. Use the same power and systems in each model... an electric motor or an IC engine, whichever is cheaper and less problematic in your environment. Using the same powerplants will soon tell you which configuration performs better.

Then start adding weight to the models a little at a time, until the differences in handling, stability, general behavior, maneuverability, etc. begin to show clearly form one configuration to another. This will tell you which full-size aircraft will handle better, or be more benign, etc.

All of this information will be yours at a very very low cost. Model airplanes (from wind tunnel models to flying models) have provided good, accurate, usable basic data for ALL of the great aircraft in history. It is one of the very few instances where the cheapest way is the very best, fastest, and easiest. If it was good enough for the DC-3, good enough for the U-2 and the Blackbird, and still good enough for Barnaby Wainfan a few months ago, it should be good enough for you and I :)
 

rotax618

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Bert Rutan said in the Black Sky video that he always buildt a simple model of his design and hand launched it from a tower the ascertain its CG and stability
 

jedi

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Reasonable simple end plates aren't optimum, but can be multipurpose & worth the weight.

Assuming a plank style rectangular or tapered wing, you can get tip skids to protect the wing, more yaw stability, and some tip vortex control for little extra weight and drag.
Add the BSLD of Al Bowers to the Hershey Bar of you plank and you can have reduced drag and beter handling with a very simple wing tip as proposed in prior threads.

Reference: EAA 2016 founders Inovation Competition

Post #3 for a start.
 
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