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Mis-marked 70mm Medusa?
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E-Revonut
RC-Monster RC8T
 
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Posts: 2,554
Join Date: Jan 2008
Location: Syracuse, New York (Camillus)
Mis-marked 70mm Medusa? - 04.22.2009, 09:19 PM

I bought a 70mm Medusa. 36-70-1600, and my original plan was to run it in my truugy. After a couple runs I wasn't impressed with the power so I put my Neu in the truggy and the Medusa in my E-Revo for bashing. Power seemed decent but temps where pretty high, 165-170* (also got real warm in truggy) and it was running really fast. I now have my Revo geared as low as I can with what I have, 68/20 gearing - 1600kv - 5s - Masher tires, calculator puts it at about 29MPH but the thing still hauls!!! Now that same setup but 2000kv puts me around 36, much closer to what it's doing! I also plugged the numbers in for the truggy and that's what makes me think that this motor is marked wrong. If I had it overgeared in the truggy performance would suffer and have higher temps right?

Anybody think this is possible???
Anyway to check?


E-Revo/5s/1600kv

Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.8333333333333332
Other Ratio: 1
Spur Tooth Count: 68
Pinion Tooth Count: 20
Total Voltage: 18.5
Motor KV: 1600
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.007
Spur/Pinion Ratio: 3.4 : 1
Total Ratio: 17.74103 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Total Motor Speed: 29600 RPM
Vehicle Speed: 28.79 mph (46.25 km/h)
Effective KV Value: 1600

E-Revo/5s/2000kv
Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.8333333333333332
Other Ratio: 1
Spur Tooth Count: 68
Pinion Tooth Count: 20
Total Voltage: 18.5
Motor KV: 2000
Tire Diameter (inches): 5.8
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.005
Spur/Pinion Ratio: 3.4 : 1
Total Ratio: 17.74103 : 1
Tire Circumference (inches): 18.22 inches (462.82 mm)
Total Motor Speed: 37000 RPM
Vehicle Speed: 35.99 mph (57.81 km/h)
Effective KV Value: 2000

RC8T/5s/1600kv
Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 54
Pinion Tooth Count: 17
Total Voltage: 18.5
Motor KV: 1600
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.007
Spur/Pinion Ratio: 3.18 : 1
Total Ratio: 13.65882 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Total Motor Speed: 29600 RPM
Vehicle Speed: 36.43 mph (58.51 km/h)
Effective KV Value: 1600

RC8T/5s/2000kv

Differential Ratio: 4.3
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 54
Pinion Tooth Count: 17
Total Voltage: 18.5
Motor KV: 2000
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.005
Spur/Pinion Ratio: 3.18 : 1
Total Ratio: 13.65882 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Total Motor Speed: 37000 RPM
Vehicle Speed: 45.53 mph (73.14 km/h)
Effective KV Value: 2000


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