Your Chrysalis 2M looks interesting. Is there any reason why I should not
place an 8 oz. electric motor in the nose and a 7 cell battery in the
unoccupied space under the wing?
From : Don Stackhouse
You mean like the attached photo?
The fuselage sides in the nose are about 3.5" shorter, with the motor
mounted with 5 degrees down thrust and 2 degrees right thrust. That's a
Speed 600 in the nose, driving a Graupner 8"-4.5" folding prop. That's a
cheep, simple setup for sport flying, but a geared setup with a bigger,
slower prop would obviously perform better. The battery in the photo is a
7-cell RC2006 nicad pack, but we've flown it on seven 500AR cells. In a
steep climb it blew a 20 amp fuse after several climbs, but a 25 amp fuse
does fine, so the in-flight current draw in a full-throttle steep climb is
apparently in the low 20's.
Because of the downthrust, the aft end of the motor sticks up a bit. On the
version we're planning to put in production one of these days if I can ever
work it into my schedule, we raise the top edges of the fuselage sides in
the nose to make room for this. However, if you're converting the stock
sailplane version you can get the necessary clearance by hollowing out the
underside of the hatch.
The plane flies extremely well, even with the direct-drive setup. We
initially designed the HLG and 2-meter Chrysali with lots of wing area to
provide for older, heavier radio gear that beginners were likely to use
back then, and to provide a better "visual footprint" to make it easier for
novice fliers to see. That extra wing area is excellent for carrying the
extra weight of batteries and motors.
Don Stackhouse
DJ Aerotech
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