Milestone 3 (Part 1): Choice of Parts and Why

Turnigy Aerodrive SK3 - 6364-245kv Brushless Outrunner Motor

Turns: 14T

Voltage: 10S Lipoly

RPM/V: 245kv

Internal resistance: 0.018 Ohm

Max Loading: 70A

Max Power: 2700W

Shaft Dia: 8.0mm

Bolt holes: 32mm

Bolt thread: M4

Weight: 718g

Motor Plug: 4mm Bullet Connector

Reason behind Choice: Calculations show that 245rpm/volts is a adequate rating that can drive the go-kart to reach 30km/h under non-ideal conditions.

•Frequency of Operation: 16.6kHz.
•Standby Battery Current: < 1mA.
•5V Sensor Supply Current: 40mA.
•Supply Voltage: PWR, 18V to 90V.
•Supply Current, PWR, 150mA.
•Configurable battery voltage range, B +. Max operating range: 18V to 45V.
•Analog Brake and Throttle Input: 0-5 Volts. Can use 3-wire pot to produce 0-5V signal.
•Reverse Alarm, Main Contactor Coil Driver, Meter: <200mA.
•Full Power Operating Temperature Range: 0 to 50 (controller case temperature).
•Operating Temperature Range: -30 to 90, 100 shutdown (controller case temperature).
•Motor Current Limit, 10 seconds boost: 100A .
•Motor Current Limit, continuous: 40A .
•Max Battery Current :Configurable.

Reason behind choice: Motor Current Limit matches max current limit.

•    Axle Dia. 
•    Axle lengths 

36 tooth 35 pitch
Overall size 4-1/2" dia. x 21-1/2" long
Shpg. 10 lbs.

Reason behind choice: Price

Rear Wheel:
This is a 24 x 1 black 6 spoke X-Core wheel. It is light weight with a 2.0" hub. Includes plastic pushrims, with your choice of bearings and solid urethane street tire.

Reason behind Choice: 2 rear large wheels are part of our design. We have decided to get the X-Core wheels as they provide a good balance between price and function.

Front Wheel:
200x50 (8"x2") Front Wheel Assembly for Razor E150

Steel Machinable-Bore Sprocket for #35 Chain, 3/8" Pitch, 9 Teeth, 3/8" min Bore

Reason behind Choice: Along with sprocket that is already attached to the differential, this sprocket that is going to be attached to the motor satisfies the gear ratio that will give a maximum speed of 30km/h.

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