How exactly are people getting long run-times?

Originally Posted by lutach

In general a lower Kv motor would have lower turns and offer higher torque. There are other factors that plays in this as well, but I'm not an engineer and would hate to give out the wrong info.

Wouldn't you only benefit from this extra torque in a low kv & high voltage setup vs a high kv and low voltage setup?

Although the 1400kv motor would have more torque than a 1700kv, you'd have to gear the 1400kv motor higher to reach the same speed as the 1700kv motor.

I entered two buggy setups in the speedalc. Only difference between the two is gearing and motor. I used a 1515 3d (1360kv) and 1515 2.d (1650kv). According to the calc the 1360 kv has more motor torque, but the final torque is exactly the same as the 1650kv setup. I am assumng that both setups would have the same amp draw (this is were I could be going wrong)

1515 3d:
Total Motor Speed: 28886.4 RPM
Vehicle Speed: 34.83 mph (55.94 km/h)
Effective KV Value: 1301.19
KT constant: 0.99 oz-in/A
Motor Torque: 0.41 ft-lbs
Final Torque: 4.6 ft-lbs
Final Power: 1776 watts (2.4 HP)

1515 2.5d
Total Motor Speed: 35310 RPM
Vehicle Speed: 34.93 mph (56.12 km/h)
Effective KV Value: 1590.54
KT constant: 0.82 oz-in/A
Motor Torque: 0.34 ft-lbs
Final Torque: 4.62 ft-lbs
Final Power: 1776 watts (2.4 HP)

Another thing I was thinking is that you'll be running the 1360kv motor closer to it's max rated amps and will run hot easier?