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lutach
RC-Monster Dual Brushless
 
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Join Date: Sep 2006
01.10.2008, 04:59 PM

Ok. Here is what I'm going to try next just to see what is the limits of this controller and too see if I can get the overheat protection to kick in. I don't know what the Kv of the Trinity N80, but I might be able to find out with my SPIN-75 and the program box. I threw in my 11.1v 2200mAh pack which has shown bursts of 128A. I kept the 79T spur gear, but changed the pinion from 23T to 30T, because I couldn't find my 32T one. I did a little calculation and it might reach 75MPH. I also took out the foams and added the rubber tires.

Enter Front/Rear Differential Gear Ratio: 2.5
Enter Transmission Gear Ratio: 1
Enter Additional Gear Ratio: 1
Enter Spur Gear tooth count: 79
Enter Pinion Gear tooth count: 30
Enter total battery voltage: 11.1v
Enter kv rating of brushless motor: 6000 (I took a guess)
Enter tire diameter in inches: 2.5
Enter the added radius of tire "ballooning" in inches: 0
Enter Current draw in amps: 50 (I took a guess, I forgot to bring the DPR)
Enter motor resistance in Ω: 0

Spur/Pinion Reduction Ratio: 2.63:1
Total Reduction Ratio: 6.58333:1
Tire Circumference: 7.85 inches (199.49mm)
Total Motor Speed: 66600 RPM
Final Vehicle Speed: 75.24 MPH (120.86km/h)
Effective speed rate: 6.78mph/V (10.89kmh/V)
Calculated Loaded KV value: 6000 (I took a guess)
Calculated motor torque: 0.06 ft-lbs
Calculated final torque: 0.39 ft-lbs
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