AboutKen Myers Expertise I can answer beginning, advanced and expert questions about electrically
powered R/C model aircraft, and many questions about R/C model aircraft of
all types, except helicopters. I`ve been building, flying and designing R/C
model aircraft for 40 years.
Experience I have been building and flying radio controlled model aircraft since 1960. I'm the president of the Electric Flyers Only, Inc., located in southeasten Michigan. I'm a past president of the National Electric Aircraft Council. I'm vice-president of the Midwest R/C Society. I was president and main founder of the UFO (Union Lake Flying Organization). I've built and flown most types of model aircraft except helicopters.
Question Hi Ken,
I just finished building a CMP Transall C-160 EP (1450mm wing span); I put 2 x Ultrafly F18-10 motors with 2 x 30a escs and 2 x 4000 3s lipo. The props are 9,5 x 7,5.
I normally fly my airplanes with at least 100 watts per pound. The Transall weighs 6 pounds but I only have 550 watts at full throttle because of the restriction of prop size. I'm sure it is OK for take off, but one in the air, let's say at 2 throttle, what kind of flying do you think I will be able to achieve?
Thanks,
Philippe
Answer Hi Philippe,
100 watts in per pound is kind of a standard target goal today, so 550 watts in on a 6 pound plane should not be a problem especially when flying a scale like plane in a scale like manner. Back in the NiCad days we tried for 60 to 75 watts in per pound, and the planes flew well. You have some large capacity packs, so your flights shouldn't be too short even though you may not be able to reduce the throttle as much as with larger props. It should fly pretty well, would be my guess.
