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:

1. https://hobbyking.com/en_us/turnigy-aerodrive-sk3-3536-1050kv-brushless-outrunner-motor-1.html?queryID=519c9e285b3c2a1d780ba2b21819b811&objectID=47284&indexName=hbk_live_magento_en_us_products

2. https://hobbyking.com/en_us/propdrive-v2-3548a-1100kv-brushless-outrunner-motor.html?queryID=519c9e285b3c2a1d780ba2b21819b811&objectID=58981&indexName=hbk_live_magento_en_us_products

3. https://hobbyking.com/en_us/turnigy-aerodrive-sk3-3548-840kv-brushless-outrunner-motor-1.html?queryID=519c9e285b3c2a1d780ba2b21819b811&objectID=47290&indexName=hbk_live_magento_en_us_products

4. https://hobbyking.com/en_us/turnigy-g90-325kv-brushless-outrunner-motor-90-glow.html?queryID=a0eed29fa4536e37cb6ea858e45c9dbf&objectID=86083&indexName=hbk_live_magento_en_us_products

*Assuming using 25% Max Voltage. Motor Speed [RPM] = KV(0.25)(Max Voltage)

Sources:

1. https://www.flitetest.com/articles/how-to-choose-the-perfect-brushless-motor