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hoovhartid
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Posts: 468
Join Date: Jun 2008
07.16.2008, 05:48 AM

Quote:
Originally Posted by asheck View Post
Would someone else like to try to figure this out with the speed calculator?Because either this motor is off in the rating,The battery is holding 16+ volts under load,or I'm an idiot and doing something wrong with the calculator.
Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.8333333333333334
Other Ratio: 1
Spur Tooth Count: 54
Pinion Tooth Count: 24
Total Voltage: 14.8
Motor KV: 2000
Tire Diameter (inches): 5.9
Tire Ballooning (inches): 1
Motor Current Draw: 105
Motor coil Ω: 0.006
Spur/Pinion Ratio: 2.25 : 1
Total Ratio: 11.74038 : 1
Tire Circumference (inches): 24.82 inches (630.39 mm)
Total Motor Speed: 28340 RPM
Vehicle Speed: 56.73 mph (91.13 km/h)
Estimated Adjusted Speed: 52 mph (84 km/h) - 8% loss
Effective KV Value: 1914.86
KT constant: 0.68 oz-in/A
Motor Torque: 0.37 ft-lbs
Final Torque: 4.34 ft-lbs
Final Power: 1554 watts (2.1 HP)


Where did you go wrong? Tire size? Ballooning Amount?

just messin with ya. Its a nice set-up man
   
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