madin88 wrote: I wonder what your bike weights or do you pull a trailer with it?
108 kilos !!!! The motorcycle fork itself is around 15, but I won't go back to bicycle stuff for stiffness and braking reasons. Batteries are awfuly heavy too : it's a total of 20s 28p and it's going to be even worse soon with a total of around 20s 34p (super odd front battery box in progress). Yes I can put a trailer + somebody on the rear battery box (did 500 km like that with my girlfriend this summer). In that case it should still be able to climb, which is complicated if you want something also able to reach 100 kmh, when there's no passenger.
Rube : I made an air deflector to cool the rear motor as described above. I used Chanel crate wood and Hermès duct tape for obvious esthetic reasons !
Liveforphysics : No load is OK, I checked already. I slept on it and made a 55 km trip from Paris city center to the countryside this morning, after reducing batt and phase amps to 111 / 300. Did almost never WOT (just a few bursts less than 3 seconds to fit in the trafic). As soon as I keep nominal input around 4kw per motor, it's under 110° again. Just have to swap between boost and normal mode sometimes to push harder temporarily with the cooler front hub.
The only doubt I have is about my angle corr (-11°) and ind timind (590 us). Sorry, it's a question that should be in the Adaptto thread (already asked there BTW but no answer) : do you or anybody know if these are normal values for a 3k 3t ?
In fact it's more and more obvious to me that if I want a heavy duty fast cargo thing, rear 3k is just too small. Trying to cool a motor is OK within reasonable limits : at some point removing heat doesn't solve the problem of it being generated. I think everybody here is OK with the idea that the more heat generated - no matter it's dissipated or not - the less eficiency. So when I read people with a qs 205 claiming they have a 20 kw bike, please don't mind if I have doubts !!! They have a 20 kw roller toaster, as I do now with my 3t config.
My conclusion is that I need a 3k 4t front in a 21" motorcycle rim with OVS 4 + a 5k turbo 4t in a 19" moto rim, OVS at 6. My 100% empiric approach tells me that it will be more efficient in real world use and not slower. Do you agree with that ?