Quote:
Originally Posted by aqwut
I think you have a solid (cheap $) setup there man... that should do you really good..... I use a 40mm x 20mm fan, and just zip tie it around the motor... 20/40 gearing comes up to only 36MPH.. for my revo 3.3.. Wouldn't you need 22/36 for 45MPH..?
and that motor is plenty powerful for that revo.. Awesome!
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Thank you for your reply.
Here are the values that the speed calculator gave me. It LOOKS correct.........hmmmmm..........
Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.8333333333333332
Other Ratio: 1
Spur Tooth Count: 40
Pinion Tooth Count: 20
Total Voltage: 22.2
Motor KV: 1200
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2 : 1
Total Ratio: 10.4359 : 1
Tire Circumference (inches): 18.06 inches (458.83 mm)
Rollout: 1.73:1
Total Motor Speed: 26640 RPM
Vehicle Speed: 43.67 mph (70.15 km/h)
Effective KV Value: 1200
KT constant: 1.13 oz-in/A
The difference is probably in the transmission gear ratio.