1) September 9th, 2011
Did several test flights today with different power systems. 70F ambient, 15-25 mph cross wind.
a) A40-10s (750kv, 205g), Gens ACE 4s-3800, Xoar 15x8, 68A, 15.4V, 1047W. 8 min flight, motor & ESC warm --> plenty of power and speed, great setup.
b) A40-10L (500kv, 276g), Gens ACE 5s-3300, Xoar 15x8, 46A, 19.5V, 897W. 10 min flight, motor and ESC COOL --> more than enough power, great vertical, enough speed. I like this.
c) A40-10L, Gens ACE 5s-3300, Xoar 16x8, 55A, 19.2V, 1056W. 10 min flight, motor slightly warm, ESC cool --> hovered like a heli, lacking speed and difficult to roll @ end of flight. I prefer the 15x8 prop unless you want to hover all day long.
d) A40-10L, BL 6s-2650 30C, Xoar 15x8, 58A, 21.8V, 1264W. 10 min flight, motor slightly warm, ESC cool, great speed, but "too much power" made me nervous. I will try to like this.
That's it. My generator ran out of gas (filled last week).
2) September 10th, 2011
3 props with Hacker A40-10s, Gens ACE 4s-3800 25C. 74F ambient, 5mph wind.
a) APC 14x7, 7 min flight. Motor slightly warm, enough speed, but lacking punch out of hovers. Put back 1.9 Ah --> 14.8V x 1.9Ah = 28.1 Wh used.
b) APC 15x8, 7 min flight. Motor warm (hold > 10s), better speed, more thrust in hover, slower throttle response. Put back 2.15 Ah --> 14.8V x 2.15A = 31.8 Wh used
c) Xoar 15x8, 13 min flight. Motor warm (hold >
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