20-09-2009, 01:02 AM
some initial tests with wattmeter tonight have me wondering what will be best prop choice for "helen"..
all results are on 60 amp turnigy plush , 2200mah turnigy 3s 30-40c batts, 35-42 1250 kv turnigy outrunner, first 11x 7 test was done at 12.5volts last t28 prop was at 12.2 volts..
11x7 prop = 848 watts = 79 amps @ 3/4 throttle and got scared!
10x7 prop = 680 watts = over 80 amps @ WOT
9x6 prop = 544 watts = 49 amps @ WOT
10x6 nitro prop = 520 watts = 50 amps @ WOT
9.5x7.5(standard t28) prop = 607 watts = 57 amps @ WOT
clearly there is enough power but i will burn out the motor at extended WOT. it is also clear to me now that i have chosen the wrong variation on the motor and that i would have been better off with the 1000 kv version. all part of the learning process i guess , dad is bringing over an 8 x 6 to test tomorrow and im also thinking 9 and 10 inch props with less pitch although i think this amp situation may affect the end result as i was looking for endless vertical. :roll:
all results are on 60 amp turnigy plush , 2200mah turnigy 3s 30-40c batts, 35-42 1250 kv turnigy outrunner, first 11x 7 test was done at 12.5volts last t28 prop was at 12.2 volts..
11x7 prop = 848 watts = 79 amps @ 3/4 throttle and got scared!
10x7 prop = 680 watts = over 80 amps @ WOT
9x6 prop = 544 watts = 49 amps @ WOT
10x6 nitro prop = 520 watts = 50 amps @ WOT
9.5x7.5(standard t28) prop = 607 watts = 57 amps @ WOT
clearly there is enough power but i will burn out the motor at extended WOT. it is also clear to me now that i have chosen the wrong variation on the motor and that i would have been better off with the 1000 kv version. all part of the learning process i guess , dad is bringing over an 8 x 6 to test tomorrow and im also thinking 9 and 10 inch props with less pitch although i think this amp situation may affect the end result as i was looking for endless vertical. :roll:
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