AVRO 539B Scratch Build in flight.
This is not the maiden - I managed that Sat 4th Jan – which, after a few heart-leaps during the trimming-out phase, was very successful. Well the flying was great, but the filming was a washout. I somehow set my camera specs to record in audio mode only. Sound but no video! :-(
Desperate to get the little beast on film I spotted a brief lull in the winds and ventured out Sun 5th Jan. By the time I got to my flying site the calm spell was just finishing and the wind was on the rise. Just time for one quick flight before it got too scary for me!
This plane can fly MUCH slower, but that doesn’t cut it in these winds.
UPDATE 02/03/2014; the plane had a 1700KV 28A motor to start with, but current draw was quite high with the 9x3.8 prop I was using. Time in the air wasn't really that good. I tried a smaller prop, 8x4, to allow the motor to use its revs to produce the thrust - hoping for more efficient use of the motor - but I think too much thrust was lost pushing air against the blunt nose. A bigger prop pushes more air out beyond the blunt nose, so not so much thrust is lost. With all that in mind I decided to try a slower revving motor, better suited to turning a bigger prop. I went for an EMAX GF2215/20 1200KV which theoretically draws about 20A with a 10 x 4.7 slow flyer prop. I only had 9 x 4.7 prop around, so tried the plane with that. It flew fine, with plenty of get-up-and-go for the take-off. I'm guesstimating my max current draw from this 'under-propped' setup is somewhere around 15-16A. This should give me much better flight times, though I've still to get a chance to confirm this. Last outing, with the new motor and prop, shortly after I got the plane in the air the wind picked up and I was happy (relieved) just to get it down without mishap!
Love your articles - keep making planes and keep posting them - later - art
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