-Bugsy-
100 mW
Hi All.
This is my first significant post here on E.S.
Like many who first start out, I have been lurking in the background gathering ideas and bringing myself up to speed on the choice technologies and issues relating to them. I am now up to the stage where I think I have a viable design that fits with my dream e-bike and some funding set aside. So before pressing the 'buy it now' button I'd like to run it past the E.S forum here for impressions / advice / comments.
About Me:
I fix X-ray machines for a living so am not adverse to swinging a soldering iron or spanner. Also an avid bike enthusiast that races downhill MTB. However, I have no experience with RC components or LiPo.
Purpose:
I know twin 3220’s are probably overkill, but this project needs to have horsepower issues that boarder on the ridiculous. Ultimately, I’d like to race this thing on a go-kart track against the mini-motards. Plus, I’d get a huge kick out of wearing leathers on a bicycle. The spirit of this build needs to strike fear into the hearts of those who mount it. Not a Sunday ride through the park.
The donor bike:
DMR frame. Chromolly for strength. Marketed as a hard-tail downhiller (slack head angle and can accept long travel forks) making it stable at speed. Hardtail for the precious ‘real estate’ in the front triangle. As much as I’d love to do a dualie. That may have to wait to be build 1.2
Drive System:
I have my eye on one of Matt’s V3 drive systems with the twin 3220’s fed by twin HV160 controllers, throttle interface and Magura twist grip throttle. There was also mention in a non hub thread a few days ago about a slipper clutch that can be incorporated into a V3 drive system. This news allays many of my concerns about an RC build and I would offer my first born child for such a setup. Wink.
Q: Can someone point me towards a tech thread about modifying HV160 capacitors?
I plan to mount the motor under the down-tube in front of the bottom-bracket via some frame clamps. Pinned through the frame if nescerary to prevent torque twist
I plan to use 219 chain from the freewheel output on the drive system straight back to a broached freewheel on the hub (gearing to be determined) with a parallel single-speed chainline to the crank for pedaling – Yes. I also want to be able to pedal this thing as well.
Q
o you recommend a second broached freewheel for the pedal driveline as well? Where can I get one – or two?
Both wheels will be 26†with the rear been a custom build with 10guage spokes and 135mm Hadley / Hope / Aireal hub (very high quality)
Battery System:
LiPo – Turnigy Nano 6Ah 6S 25-50C times 4 giving a 12S2P (12Ah) pack – yeah? Mailorder from HobbyCity.
Q: Can someone please recommend a good LiPo charger for a 12S setup? Hyperion?
Q: Does the HV160 take care of LVC or should I consider some sort of BMS as well?
Any advice or opinions are welcome as this represents a hefty financial outlay but I think the result will be worth it. Promise to post lots of action video.
Thanks in advance..
This is my first significant post here on E.S.
Like many who first start out, I have been lurking in the background gathering ideas and bringing myself up to speed on the choice technologies and issues relating to them. I am now up to the stage where I think I have a viable design that fits with my dream e-bike and some funding set aside. So before pressing the 'buy it now' button I'd like to run it past the E.S forum here for impressions / advice / comments.
About Me:
I fix X-ray machines for a living so am not adverse to swinging a soldering iron or spanner. Also an avid bike enthusiast that races downhill MTB. However, I have no experience with RC components or LiPo.
Purpose:
I know twin 3220’s are probably overkill, but this project needs to have horsepower issues that boarder on the ridiculous. Ultimately, I’d like to race this thing on a go-kart track against the mini-motards. Plus, I’d get a huge kick out of wearing leathers on a bicycle. The spirit of this build needs to strike fear into the hearts of those who mount it. Not a Sunday ride through the park.
The donor bike:
DMR frame. Chromolly for strength. Marketed as a hard-tail downhiller (slack head angle and can accept long travel forks) making it stable at speed. Hardtail for the precious ‘real estate’ in the front triangle. As much as I’d love to do a dualie. That may have to wait to be build 1.2
Drive System:
I have my eye on one of Matt’s V3 drive systems with the twin 3220’s fed by twin HV160 controllers, throttle interface and Magura twist grip throttle. There was also mention in a non hub thread a few days ago about a slipper clutch that can be incorporated into a V3 drive system. This news allays many of my concerns about an RC build and I would offer my first born child for such a setup. Wink.
Q: Can someone point me towards a tech thread about modifying HV160 capacitors?
I plan to mount the motor under the down-tube in front of the bottom-bracket via some frame clamps. Pinned through the frame if nescerary to prevent torque twist
I plan to use 219 chain from the freewheel output on the drive system straight back to a broached freewheel on the hub (gearing to be determined) with a parallel single-speed chainline to the crank for pedaling – Yes. I also want to be able to pedal this thing as well.
Q
Both wheels will be 26†with the rear been a custom build with 10guage spokes and 135mm Hadley / Hope / Aireal hub (very high quality)
Battery System:
LiPo – Turnigy Nano 6Ah 6S 25-50C times 4 giving a 12S2P (12Ah) pack – yeah? Mailorder from HobbyCity.
Q: Can someone please recommend a good LiPo charger for a 12S setup? Hyperion?
Q: Does the HV160 take care of LVC or should I consider some sort of BMS as well?
Any advice or opinions are welcome as this represents a hefty financial outlay but I think the result will be worth it. Promise to post lots of action video.
Thanks in advance..