Aug 03, 2009, 12:57 PM
Mission Viejo, CA
Joined Nov 2005
46inch WS aerobatic (3D/patern/hybrid) FFF design
I have been working on my 3D skills and like many I decided I would go the foam route for practice and save the balsa planes. well after a few go arounds I came up with something that works for me.
1. big enough to handle outside flying.
2. control surfaces and wing area big enough for stable flight but small enough to mimic "Real" models.
what started out as a 31inch yak54 design has been modded to a 46inch custom design. It has a 3inch longer fuse length 30% reduction in wing area and 25% overall reduction in tail surface area. Wing design is more tapered than a Yak or Extra and is more like a pattern plane. Rudder almost 50/50 in regards to area above and below the wing and the elevator design is also more tapered than most plane designs.
what that translates to is something that acts more like a balsa plane than a foamie. you will get wing rock at slow, slow speeds and you don't have giant control surfaces to help doing 3D moves. It rolls like a dart, has minimal tail lag and slightly couples to the gear when doing a knife edge. It may take a few more iterations to get it perfect but for now it gets way more flight time than anything I have.
2.3lbs - 2.4lbs
46.61 Wing span
43.25 overall length
.5 inch FFF (doubled up FFF sheets or you can use depron)
HS81's all the way around
12 X 6 or 13 x 3.8 APC
3S 2100 lipo 15C continuous 25C burst
it's not the lightest ship, but it flys for 6-7min
I post up the design in a full scale .PDF as well a packed up in a zip file with a .dxf file. as well as pics when I dump the camera.