John in CR wrote:So you decided you wanted regen braking after all? What are you going to do about the mountains? Ready to cut me a deal on that heavy Nuvinci yet, since you don't need it any more unless there's another motor in the plan?
beast775 wrote:why not just a front hub? less is better.simple.ive been watching the builds and you keep me goin, ow boy. ,but very entertaining i must say.
WeÃ¢â‚¬â„¢ve managed 480 pounds gross up the steepest block in San Francisco (31.5% grade). This extreme torque capability distinguishes Stokemonkey from electric bike products not designed for cargo applications.
John in CR wrote:LI-ghtcycle,
Sorry to burst your bubble, but the Nuvinci can't do regen. The Nuvinci sprocket is a fixed gear, so it has to coast instead of drive the motor for electromotive braking. Otherwise it would force you to pedal as if it was a fixie with a CVT. If the hub required a freewheel sprocket in normal use, then yes it would drive the hubbie for regen if both had a fixed gear, but it doesn't, so it has to coast. I tried asking you about this in your other thread.
Regen won't net you much on a cross country trip, though getting some back after cresting a peak would have been nice. It would have been extra nice to have no brake fade concerns, and super nice to potentially not have to fiddle with brake maintenance the entire trip. Adjusting mechanical disc calipers drove me crazy with adjusting them almost daily. I loved my hydros for that at first, but then I got tired of having to replace brake pads every 4-6 weeks. Now with regen I rarely have do any brake maintenance at all, and I get a bit of juice back as an added bonus.
I thought you were narrowing the flats to fit the front dropouts.
John in CR wrote:If the wheel will drive the gear when the wheel rolls forward then you are good to go for regen, a lucky break for you because I consider no coasting a bit of a design snafu that they since corrected. Good think we jumped through these extra discussion hoops, because I definitely want the option, fixed or FW, so I need to buy an old version.
Keep in mind that regen will try to unscrew the hub's fixed gear just like the motor torque during electric assist will try to screw the fixed gear on the hubbie.
Now hurry up and get the Nuvinci proven with a cross country ride using a hubbie mid drive. Actually I'm most interested in power consumption at 20mph on flat ground during your testing, both in direct drive as well as with the motor at full throttle and decreasing the gearing with the oldvinci until you get back down to 20mph.
docnjoj wrote:Hey LI-ghtcycle! That is a nice piece of work. I do have a question about having 13 lbs of rotating mass up that high. Have U noticed any problems with handling or gyroscopic reaction?
Users browsing this forum: Bing [Bot], d8veh and 10 guests