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brainanator
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09.26.2011, 08:09 PM

I've never examined an RC shifting transmission, but is there any slippage? I ask because you're going to get up to 90mph @ 30k rpm, and then it shifts right?...... So then you have that huge mass of a motor spinning at 30k, and now it's way too fast for the speed it's traveling, seems to me like you're going to either break something or spin out the wheels instantly.


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Last edited by brainanator; 09.26.2011 at 08:11 PM. Reason: clarify
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ziggy12345
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09.27.2011, 01:52 AM

The 2 speed clutch is a 2 stage clutch. As the shoes fly out under spring pressure it engages the clutch bell. This rotates the shoes and engages the clutch cam locking the clutch shoes in place with no slip.

When the car changes into 2nd there will be a reduction in revs with the same throttle input resulting in a jump in amp loads. Whether this results in wheel spin or just an increase in acceleration can only be known with testing. The obvious thing to do would be to decrease throttle input but knowing when the car changes might be a problem.

The car will have a gyro so will track straight even if it spins the wheels.
   
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Revorocks
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09.27.2011, 01:02 PM

Love speed build threads, will be following this one closely.

I'm not too keep on 2 speeds myself, I have a feeling with the amount or torque that motor has the second it reaches 2nd gear it will either spin the wheels or break something.

Would you not be better off going for a single speed, and making a custom motor mount so you can fit a huge pinion? You could have the pinion machined by RW..

Still, the specs look great, that ESC is a monster! I think Nick used one of those in his Slash Insanity project.
   
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