"Red Duck" RC flying wing

myminifactory

Videos http://youtu.be/c6Udkt3NSK0 https://www.youtube.com/watch?v=KJ8IwZIfqx4 My goal was to design a plane with a 3 m wingspan, without using carbon tubes - that means 100% printed. However, I had to stop at 1.35 m because the wing weighed almost 1.1 kg already. My small motor wouldn't last much longer under that weight. Additionally, I thought a flying wing design would be less troublesome for getting the CG forward, due to the short tail. But again, I faced the same issue. The big mass of the wing pushed the CG backwards, so I had to add a spacer in front. This makes the plane look a bit like a duck. Nevertheless, I secured the wing ends with tape to allow extending the wing span at any time. Uli Richter, a long-time Lufthansa pilot and experienced model airplane builder and flyer, was kind enough to fly my wing plane. He had no problems and immediately showed us an acrobatic flight display. Thank you very much for the wonderful flights! It wasn't easy to follow with the camera all the unexpected maneuvers in flight. Therefore, the video can't give the impression of what it was like in reality. My Club: http://hackerspace-ffm.de/ Specifications Wing Span: 1350 mm Wing Chord: 336 mm Aerodynamic Center: 78.1 mm 5% Stability Point: 61.3 mm Wing Profile: Clark YS Overall Wing Weight: 1100 g Fuselage Overall Weight: 680 g Wing Loading: 39.2 g/dm² Directional Stability (Thies): STFs - 38 Motor: Robbe Roxxy BL Outrunner 2834-08 Propeller: Aeronaut CAM 10 x 6" Static Thrust: 1100 g (3S Lipo) Print and Material Print Time Wing: 81 hours Print Time Fuselage: 35 hours Used PLA: 1.4 kg Update 2014/09/29 "Fuselage 02 Brim.stl" replaced by "Fuselage 02 Mod Brim.stl" The lower edge of the border is rounded for easier printing.