Sunday, October 05, 2008

Electrify TWM Nemesis 52

































Wingspan 1500mm
ARF weight 2 kg

There is huge space to place the lipo, electronics from ABOVE. The canopy can be opened and expose the front tank area.

I use 4 M4x80 mm screw and a stock motor mount. The aluminium motor mount is too weak and fractured on ground test just before the maiden. (subsequently confirmed to cause by the length of the 5mm motor shaft)

Power : 7sA123 (maybe 2p parallel to increase flight time) , 800kv BL (from my Helicopter Gaui Hurricane EP550) , 50A ESC. APC 10x 4E , current 40A.
Power ~ 950W.

Maiden flight
C.G. a bit forward. Very windy/easterly monsoon condition ~40kph.
Plane tends to stall at too slow speed especially turning against up wind.
10" propeller proves to be fast but low in thrust. Fourth flight results in stall and crash.
Should not be too difficult to repair as the wing and control surfaces are intact.

10/2008

Repair is not too difficult and completed in 4 hours. Now more than 20 flights.

Tail steerable wheel tends to bounce up and lost control on taxi. Resolved by pulling elevator stick to down a downthrust on the tail. Now using 10-6 gas engine propeller and performs similar to 10x5E.


Nov-2008

Second major crash, after flying an empty battery and a stall landing. Another rebuilt is going on....Even the motor shaft got broken and need replacement.