Flying wing

[doctormike]

I'm designing a BOT style flying wing. NO vertical stabs. If she flies as well as she looks... what a beauty! Doc

[fhhuber]

The easiest way to avoid needing veritcal stab is to provide ample sweep-back. This acts somewhat like dihedral and vertical stabilizer.

Then you'll want some form of controlled drag at the wingtips for yaw control.

[doctormike]

I'm using sweep as well as dihedral just like the Horton gliders. An airfoil with a slight upward turned trailing edge (reflex) and elevons on the outer part of the wing only, are important for stability. Also washout can be difficult (if not impossible) on a folded foamboard wing, so extra reflex on the outer 3" of the elevons will help reduce tip stall tendencies and take the place of washout. I hope all this research pays off! Doc

[rifleman_btx]

That's why I'm waiting til I get a 3d printer to continue my design. Gonna print the ribs out

[doctormike]

Let us know how that works out. I just finished my BOT flying wing airframe. (About $4 in materials) Now for the expensive part, electrics. It's 2 meters. If this flies I'm going to build a 3 meter wing, either BOT style or HO IV. Doc

[rifleman_btx]

Nice I think it should do well. Just setting the battery always was the PITA part. To get that critical cg point exact. Uuuugh.

[doctormike]

Yeah, battery placement in the wings I've built is a problem. CG is really sensitive in these things! Doc

[rifleman_btx]

Yes, that's why I'm looking to the 3d printer route, I'm hoping to have a solid solution for the battery placement that I can first move around, then epoxy in when I find the perfect place. I think that will be my best chance of getting this right this time.

[Beeg]

Let us know how that works out. I just finished my BOT flying wing airframe. (About $4 in materials) Now for the expensive part, electrics. It's 2 meters. If this flies I'm going to build a 3 meter wing, either BOT style or HO IV. Doc

doctormike, Don't know if you've flown your wing yet but I got back from the Horizon Hobby Aerotow two weeks and a guy built and flew this beautiful wing on it's maiden flight that flew very well.

video https://www.flickr.com/photos/422200...7698096661605/

https://www.flickr.com/photos/422200...7698096661605/

https://www.flickr.com/photos/422200...7698096661605/