John Chew Posted February 5, 2015 Share Posted February 5, 2015 I was interested to hear that young Austin Marhold was disappointed that he was able to "out lean" the GotWay MSuper - despite the fact that the MSuper has a 1500w (continuous), 3000w (peak) motor. I was also interested to hear that he found it far more difficult to "out lean" one of the Rockwheel models that had significantly less power. I started thinking about this, and I think I understand the "problem". For a long time I've been regularly talking about the problem of large diameter wheels and hill climbing ... and I believe that what Austin has come across is ANOTHER EXAMPLE OF THIS SAME PROBLEM. With large wheels what limits the power the motor can deliver is NOT the actual power of the motor - it's the ability of the rider to lean forwards hard enough to "demand" that power from the motor.This I describe as the "torque reaction" problem, and other people have described as the "leverage effect". It doesn't matter what you call it - it's very real, and very fundamental. Basically, as you lean forwards the motor's OWN TORQUE REACTION resists your lean - and when that torque reaction has risen enough to COMPLETELY resist the lean, that's ALL THE POWER YOU GET. Big diameter wheels give rise to a bigger torque reaction than small diameter wheels. I strongly suspect that NO 18 INCH EU EXISTS that Austin will not be able to "out lean". In fact no such 18 inch EU CAN exist - if it's designed the same basic way as our current wheels. Even if Austin found himself on an 18 inch wheel with a 10kW motor and LIGHTNING FAST response he would STILL be able to "out lean" it - because the "problem" is not the motor, or the response times, or the electronics, or the battery. It's the fact that it HAS AN 18 INCH WHEEL. This is why Austin finds the MUCH lowered powered Rockwheel less easy to "out lean". The small wheel allows him to USE the power it has - while the "torque reaction" problem means that he simply CANNOT USE the 1500/3000W that the motor of the MSuper has to offer. I suspect it doesn't matter WHAT the motor is. WHAT the electronics are. WHAT the response and settings are. Austin will ALWAYS be able to "out lean" an 18 incher. Link to comment Share on other sites More sharing options...
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