lostrack wrote:I tell you what guys...
DON'T STAND UP!
the reason you can't use a fast pickup motor for mountainbiking at the moment, is the power is so instant, you can't stand up while riding it.
I tried it on my 3220 RC setup (dialled down to 160 amps) and it threw all my weight to the back, which then made me turn the throttle more (think : the angle of your hand on the grip!). It's a real struggle NOT to flip over. Brakes VS motor are pretty well matched, so you need real control to keep it on track.
The only way I found to do this, was to sit down on the saddle - and who does this when riding a MTB on a downhill course?
I have a speed throttle which is rediculously twitchy. The RC CA setup may help
yep, its called whiskey throttle, happens on powerful dirt bikes, highly amusing, its when you get thrown back from a small throttle input, and as you fall back your hand grabs more throttle from the extra twist, and your off the back before you can say "gee that throttle is touchy".
that kona vid could not be a better example of it, very enjoyable to watch
also see the poor dude who ends up shoeless on the ground with lukes agni bike, a hv160 rc controller seems to be a key ingredient in for quality gravel rash. -we do want halls and good modulation from the controller and ill admit we dont allways get this, but rc stuff meant for planes without current control do seem a little "touchy".
but honestly guys, if you only believe one thing i say: torque throttle is what we need.
you know how it goes, the first millimeter of throttle (with all our "normal" speed based throttle controllers) gives you absolute full power, untill you get to say 10kph, then that sudden take up is the second mm of throttle, at near full road speed the first 90% of your throttle does nothing and the sudden take up happens in the last mm of throttle and at no point do you get good smooth control, its a drama on any of these high torque machines, and we are just not used to it cos all (petrol) engines are not like this.
you need to chose the torque you want with your hand, its what is natural for us so we are in precise control of how much we get thrown back, if you watch that kona stinky vid you will see this clearly, torque throttle is how we can have 5, 10 or 20 times this power level under some level of control with ic engines, and why these machines can be so bitey regardless of what type of brushless motor we are using. was it you tench haveing a go at the torque throttle a while back?
I have a nice frame already just need to get the motor in it, Cro mo mid mount with a custom frame would be mental!! ha ha I know you dont like the weight in the wheel so its the only option for you maybe? although if you are going to go that way then maybe just a big motor like a Lemco or Etek might be better? controllers are cheaper too! and the controllers that are available have better throttle settings.
if we start it...they will come 
#fieldofdreams
Grrrrr
bit of styling.
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