John Bozi
100 kW
EDIT: 5/01/15 Have renamed this thread again as I have changed direction of my next build.
EDIT: 27/9/13 Have renamed this thread as I have changed the direction of my build.
Below is the original first post:
I am looking for a HUB motor for climbing about 10-20 minute single track only. Not interested in mid drives. Gravity does it back down. Imagine the fittest cross-country rider alive and the speed he climbs at, not straight lines but going around corners and obstacles. I couldn't careless about going fast as most climbs are winding and errors on throttle could be neck braking.
Basically I will park my car at the base of the mountain, use up most of the battery to the top and enjoy the ride down unelectrified. Possibly have back up battery set ups in the car, for each different run so I don't have to cart it around.
I think I am planning to put the slowest winding motor in a 20" wheel.
Considerations I see are weight, bump handle factor and heating. I live in a subtropical area. I will of course be trying to be stealth as possible as mtb riders don't like electrics. Might look at back packing as much as possible.
Portable chairlift.
guesses: Mac 12t from cellman (anything better than this for pumping higher voltages or amps?)
or from a dogman quote on another thread: http://endless-sphere.com/forums/viewtopic.php?f=1&t=49136#p727424
EDIT: 27/9/13 Have renamed this thread as I have changed the direction of my build.
Below is the original first post:
I am looking for a HUB motor for climbing about 10-20 minute single track only. Not interested in mid drives. Gravity does it back down. Imagine the fittest cross-country rider alive and the speed he climbs at, not straight lines but going around corners and obstacles. I couldn't careless about going fast as most climbs are winding and errors on throttle could be neck braking.
Basically I will park my car at the base of the mountain, use up most of the battery to the top and enjoy the ride down unelectrified. Possibly have back up battery set ups in the car, for each different run so I don't have to cart it around.
I think I am planning to put the slowest winding motor in a 20" wheel.
Considerations I see are weight, bump handle factor and heating. I live in a subtropical area. I will of course be trying to be stealth as possible as mtb riders don't like electrics. Might look at back packing as much as possible.
Portable chairlift.
guesses: Mac 12t from cellman (anything better than this for pumping higher voltages or amps?)
or from a dogman quote on another thread: http://endless-sphere.com/forums/viewtopic.php?f=1&t=49136#p727424
My favorite though, is the extremely slow 2812 motor, which I run on 72v. 25 mph top speed, but able to climb crazy steep hills for a mile or so before melting down. By limiting the wattage to 1500w I have no problems, but I have at times doubled that to 3000w. At 3000w, with a 72v 40 amps controller, you pretty much never pedal unless it's up a grade of 30%.