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Jahay
RC-Monster Titanium
 
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Posts: 1,007
Join Date: Apr 2010
04.28.2010, 07:08 PM

As i only did a short run and didnt record temps ill have to check next run. Didnt want to run any longer not knowing the temps....

I did notice that the fan was on quite a lot of the time on the esc, but many people say that theirs is on. Im very tempted to work out a way of installing my own custom fans which remain on at all times.

Thanks for the info neil! ill use that as a general rule of thumb...

40mph is a little slow... My exact gearing is shown below... I was easily hitting 50-60 on short grass today!!! It was just as fast if not faster than my standard flux with the torq2200 i may gear it down to a 17t clutch bell.

Differential Ratio: 3.2222222222222223
Transmission Ratio: 1.5366847826086956
Other Ratio: 1
Spur Tooth Count: 44
Pinion Tooth Count: 21
Total Voltage: 25.2
Motor KV: 1600
Tire Diameter (inches): 5.5
Tire Ballooning (inches): 0.5
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.1 : 1
Total Ratio: 10.37465 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Rollout: 1.97:1
Total Motor Speed: 40320 RPM
Vehicle Speed: 75.15 mph (120.72 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...
   
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andreazinno
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Posts: n/a
05.12.2010, 11:02 AM

Quote:
Originally Posted by Jahay View Post
As i only did a short run and didnt record temps ill have to check next run. Didnt want to run any longer not knowing the temps....

I did notice that the fan was on quite a lot of the time on the esc, but many people say that theirs is on. Im very tempted to work out a way of installing my own custom fans which remain on at all times.

Thanks for the info neil! ill use that as a general rule of thumb...

40mph is a little slow... My exact gearing is shown below... I was easily hitting 50-60 on short grass today!!! It was just as fast if not faster than my standard flux with the torq2200 i may gear it down to a 17t clutch bell.

Differential Ratio: 3.2222222222222223
Transmission Ratio: 1.5366847826086956
Other Ratio: 1
Spur Tooth Count: 44
Pinion Tooth Count: 21
Total Voltage: 25.2
Motor KV: 1600
Tire Diameter (inches): 5.5
Tire Ballooning (inches): 0.5
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 2.1 : 1
Total Ratio: 10.37465 : 1
Tire Circumference (inches): 20.42 inches (518.68 mm)
Rollout: 1.97:1
Total Motor Speed: 40320 RPM
Vehicle Speed: 75.15 mph (120.72 km/h)
Effective KV Value: 1600
KT constant: 0.85 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...
Hi, are You sure the values are correct ?

With Savage flux, bulletproof diff 9/29, 44 spur and 21 pinion, the total ratio is 14.95606 : 1, not 10.37465 : 1 (definitely too high).

Specifically:

- pinion-to-spur (44/21) = 2.09
- first tranny reduction (44/18) = 2.44
- second tranny reduction (29/32) = 0.91

- total = 14.95606

Bye.
   
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