( this is a continuation of the m.e.n.s club thread here: http://endless-sphere.com/forums/viewtopic.php?f=28&t=39299
, and the discussion of the 2kW MAC, here: http://endless-sphere.com/forums/viewtopic.php?f=30&t=40166
Well, i am moving off to Utah soon, near the bonneville salt flats, and i think in the spirit of moving to the area, i will do a high power build capable of stupid speeds
I have been researching the ins and outs of chain drive for for weeks. I now know why people stick to hubs for the most part! To an electronics / computer guy, the mechanicals of a chain/belt driven system are rather intimidating. But i am determined to figure this out no matter how stupid i make myself look in the process
After many awkward conversations with motorcycle shops, scooter shops, bearing/industrial supply shops, motor manufacturers, atv shops, reading ES and motoredbikes.com, i have a plan.
Idea goes like this.. motenergy 4201 50rpm/v axial flux motor, jammed in the rear triangle of a steel bike.. plus a xtracycle to act as a battery platform / extended rear to prevent wheelies and increase traction.. may need to be modified to fit the motor - not sure yet.
I will use an infineon controller if it will work - i like the value per dollar, familiarity, and programmability of those controllers. A 36FET on matched 4110's and thick copper rails will be the minimum to deliver the power needed to max this motor out at decently long ~20kW peaks. ( 250A x ~78v ). I've been told that a pulsed DC controller will make for a noisy ride... i say.. perfect, let it scream like a banshee! and if i get busted on the street i will just put the drivetrain in a scooter or dirt bike chassis.
Unlike my pike's peak climber thread, this shouldn't drag on too long. I already have the motenergy motor ordered, i got a 2kW MAC i can play around with in this configuration until i get a 36FET controller going, i got the xtracycle ordered, i have the sprockets and chain ordered, 6 and 8 gauge copper wiring already purchased, etc
Only a few things need figuring..
1) Custom extended length pannier/bucket system.. this will be hardware store-d together and i am not sure how i'm going to do it.
2) Motor mounting and xtracycle addon modification to fit motor - this may require forking over some $ to a fabricator. The MAC will surely be hardware store-d together, but the 4201 will certainly have proper mounting.
3) Bicycle wheels are probably going to break in short order under this power, so i'm going to have to figure out WTF to do about that - maybe upgrade to motorcycle bits.
4) Brakes.. 203mm's are nice but i bet they will become abstract art pieces pretty quick stopping from >60mph.
Gotta catch that grin again..