opjose
Posts: 5494
Joined: 11/26/2005 From: Poolesville,
MD, USA Status: offline
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quote:
ORIGINAL: Nitrodan73 Tailspin, Read in the next thread about the 50 bobcat. Alot of people are having problems getting the airplane to lift off the ground because of the incidence of the wing to the ground or the front wheel getting pushed into the ground by an improper setting on the elevator. I'd hate to see you go rocketing through the soft dirt at the end of our runway! I dont think Gator and the rest of the guys would ever let you live that down. I also read that since the fuel tank is behind the CG, you balance with the fuel tank full. I never even thought about that! I bought the 50 size Bobcat after seeing Tailspins 25 bobcat. Very nice quality! After having experienced this myself, I find that this is more "user error"... What? Yeah I had set the elevator "neutral" point to align with the stab's bottom surface. Since this area is flat it made logical sense, so I put a clamp on the stab and set it up. One of the Kingkat owners at our field, noticed that I effectively had the neutral set to "push the nose down"... He was right... I re-aligned the elevator so that the stab's trailing edge aligns with the upper part of the trailing edge of the stab, when the controls are neutral. This proved to be perfect! Alone with a minor positive incidence ( making the front strut slightly longer... ) the plane has no problems lifting off and flying level. Also one must be careful with the foam wheels. The nose of the plane tends to get pushed "down" during acceleration, changing the incidence, so a 1-2 degree incidence may dissappear during runup. A 3-4 degree incidence may be more appropriate to prevent the nose "push down" during acceleration.
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- Build em'', fly em'', crash em'' and build more.
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