[~KevJ~]

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:

just as a comparison, after i burnt out the 35-42 1250 kv ive now replaced with a more conservative 35-36 910kv to increase run time and return it closer to standard power setup.test were with 3s 2200mah 30c batts and 4s 3000mah 20c batts ,my result with the 910kv are as follows:

3s 12x8 MAS 35 amp 384 watts
4s 12x8 too much , up round 1000 watts (unusable)
3s 10 x 7 MAS 22 amp 250 watts
4s 10 x 7 MAS 32 amp 500 watts
3s 11 x 7 MAS 23 amps 280 watts
4s 11x7 MAS 32 amps 496 watts.

i guess ill just run the 11 x 7 and can use both 3 and 4s batteries.. either way it was better than the
3s on the 1250 kv motor for 49 amps 544 watts or the 4s on 1250 kv for 1050 watts at like 80 plus amps.. both of that was with a 9 x 6 also so the bigger 11 inch prop should feel good on her..