Motor Selection
Notes:
Motor KV = revolutions/ volt (assuming no load attached to motor)
higher KV = lower torque, higher top speed (more spin spin)
lower KV = higher torque, lower top speed (motor can carry more weight i.e. can support larger propellers)
increasing current = increasing torque (affects load magnitude you can put on motor shaft)
increasing voltage = increasing speed
no load current = required current to turn motor without attached loads on the shaft
nominal current = required current for “normal use”
rated current = max current that can be used without damaging the motor
increasing voltage/current slightly past recommended limits will slowly wear out components (but doable, if only sustained for a short period of time). Increasing voltage/current a lot higher than recommended limits will kill your motor, plane, and your dreams of flight, very very quickly.
(Preliminary) Motor Choices:
Motor # | Price ($CAD) | KV [RPM/V] | Max Power [W] | Max Current [A] | Max Voltage [V] | Weight [g] | Calculated Motor Speed [RPM]* |
---|---|---|---|---|---|---|---|
1 | 52.06 | 1050 | 443 | 40 | 16 | 105 | 4200 |
2 | 44.44 | 1100 | 640 | 70 | 14.8 | 185 | 4070 |
3 | 68.57 | 840 | 656 | 50 | 16 | 167 | 3360 |
4 | 88.89 | 325 | 1150 | 52 | 22.2 | 600 (lol no) | 1803 |
*Assuming using 25% Max Voltage. Motor Speed [RPM] = KV(0.25)(Max Voltage)
Sources: