It took on enough shape that I think it merits a thread.
It it a platform to be fully faired, hence some rather unconventional designs choices, like low-trail geometry, steering damper, semi-low seating and LWB form-factor - all according to theory that too much trail and too forward a CP does not bode well for stability in crosswinds given a full fairing.
And yes, it's 100% no-weld.
I've been experimenting with design and assist in previous iterations, and been thinking about turning it into a leaning diamond quad - but the idea been put on back-burner because I *think* I'll manage well in a purely singletrack mode.
2.3kwh (hopefully) of chinese lifepo, and electric transmission - not unlike on Electrom, but (without downplaying his pretty creative solution) much smarter in my case.
There should be at least 3 RC motors on my setup: a generator, a high-geared fixed gear drive used for efficient cruising and regen braking (belted) and low-geared, double reduction motor for starts and hills. I'm thinking about front drive, too.
The heart(s) of the system is vescs and arduinos, communicating with UART.
Basically, I have real-time data on power I am generating, and transmit it wirelessly to two motors that, in turn, 'share the load', with priority given to the more efficient motor.
Setting any level of assist (or even 'regen pedalling') is a simple matter of controller logic.
Currently I'm having trouble with torque (unsurprisingly, since my 'ride' weight 50 kg and I weight 120) and hall sensors, so I've yet to truly try it on the street (it takes two to haul it to up to 7th floor, so I want to be absolutely damn sure it works like I want to).
The key idea is to predominately use human power for propulsion and using assist mostly to 'even out the hills'.
I'm not 100% sure that I'll leave electric transmission as main mode of operation (that depends on efficiency of the system, I have hopes but reality can be a bitch).
P.S.
I'll likely experiment with friction regen brake as well, once I get the system working. I don't want to rely on friction drive for torque - it can be unreliable in wet weather.
It it a platform to be fully faired, hence some rather unconventional designs choices, like low-trail geometry, steering damper, semi-low seating and LWB form-factor - all according to theory that too much trail and too forward a CP does not bode well for stability in crosswinds given a full fairing.
And yes, it's 100% no-weld.
I've been experimenting with design and assist in previous iterations, and been thinking about turning it into a leaning diamond quad - but the idea been put on back-burner because I *think* I'll manage well in a purely singletrack mode.
2.3kwh (hopefully) of chinese lifepo, and electric transmission - not unlike on Electrom, but (without downplaying his pretty creative solution) much smarter in my case.
There should be at least 3 RC motors on my setup: a generator, a high-geared fixed gear drive used for efficient cruising and regen braking (belted) and low-geared, double reduction motor for starts and hills. I'm thinking about front drive, too.
The heart(s) of the system is vescs and arduinos, communicating with UART.
Basically, I have real-time data on power I am generating, and transmit it wirelessly to two motors that, in turn, 'share the load', with priority given to the more efficient motor.
Setting any level of assist (or even 'regen pedalling') is a simple matter of controller logic.
Currently I'm having trouble with torque (unsurprisingly, since my 'ride' weight 50 kg and I weight 120) and hall sensors, so I've yet to truly try it on the street (it takes two to haul it to up to 7th floor, so I want to be absolutely damn sure it works like I want to).
The key idea is to predominately use human power for propulsion and using assist mostly to 'even out the hills'.
I'm not 100% sure that I'll leave electric transmission as main mode of operation (that depends on efficiency of the system, I have hopes but reality can be a bitch).
P.S.
I'll likely experiment with friction regen brake as well, once I get the system working. I don't want to rely on friction drive for torque - it can be unreliable in wet weather.