PaulD
1 kW
neptronix said:If you still need another tester, i have a pair of recumbents here, as well as some long 1-30% grades to scale.
I'll send you a PM, Neptronix.
neptronix said:If you still need another tester, i have a pair of recumbents here, as well as some long 1-30% grades to scale.
Grantmac said:Going to have a crank option for us heavy aggressive types? PF30 capable?
450w peak or sustained?
Any clips showing noise?
Grantmac said:Mainly wondering how it would compare to thesee "250w" factory bikes that peak above 1kw and put out +100nm.
Sounds like it won't have the same kind of power.
PaulD said:Savvy users can adjust the gear ratio by changing out the sprockets. The #25 front final drive sprocket is a stock part from andymark.com with 1/2" hex bore. Vex Robotics sells something compatible as well.
Mahe said:I understand 52V would work with your motor, by reprogramming the controller, but with sub-optimal efficiency. Am I correct to assume that the motor would then spin 14/10 times faster unloaded? What kind of efficiency loss are we talking about, at constant speed and load? (assuming it is easy to adjust amp delivery by 10/14)
Alternatively, one would need a smaller sprocket by a factor 10/14, is that right? (~13T instead of stock 18T, but I see only 16T on andymark for #25 chain) Or 14/10 larger chain ring? (66T ... 92T? but that would be quite big...)
Or do you plan to provide a 48V/52V version at some point?
Thanks
PaulD said:The problem with adjusting the gearing by 1.4X is that the top speed of the motor would be too high.
PaulD said:I haven't done any testing at high voltages, and with 1000's of miles on test bikes with the present configuration, I don't really want to offer a change that could affect reliability.
For now, the only solution I can offer is multiple battery packs.
Mahe said:Do you mean with respect to heating and wearing down of internal pieces? Makes sense. 40% is significant. So there is no safe workaround to internal rewiring.PaulD said:The problem with adjusting the gearing by 1.4X is that the top speed of the motor would be too high.
jvm37 said:Paul I have sent you a couple of emails
I am interested in buying one of your kits
Please take a look
Joost5000 said:Any update on the production run of the mid drives. Also, I’d love to hear about any of the “v2” tweaks.
-Dave
PaulD said:Hi Dave, I'm aiming for the end of February. There are a lot of changes coming, so I hope it will be worth the wait. Here is the tentative list of updates:
Power Increase - We have been testing at much higher power levels with good results. Final max power is TBD.
- Throttle option - Users will be able to decide if they want a throttle or the 6V headlight connector
- "Quick" release motor plates - This will allow removal of the motor/controller assembly with 4 screws
- Improved cadence sensor reliability
- Cleaner cables and overmolded connectors - no more nylon braid sleeve!
- A few others that I'm not sure will make the final cut
Nightdiver13 said:Any chance that this more powerful version will work with 48v or higher batteries?
I might have missed this somewhere, but what is the current chainline and is it achieved with any sort of special offset chainring?
PaulD said:Joost5000 said:Any update on the production run of the mid drives. Also, I’d love to hear about any of the “v2” tweaks.
-Dave
Hi Dave, I'm aiming for the end of February. There are a lot of changes coming, so I hope it will be worth the wait. Here is the tentative list of updates:
Power Increase - We have been testing at much higher power levels with good results. Final max power is TBD.
- Throttle option - Users will be able to decide if they want a throttle or the 6V headlight connector
- "Quick" release motor plates - This will allow removal of the motor/controller assembly with 4 screws
- Improved cadence sensor reliability
- Cleaner cables and overmolded connectors - no more nylon braid sleeve!
- A few others that I'm not sure will make the final cut
PaulD said:There have been quite a few requests for 48V. What is the reason you want to use 48V? Some people have 48V batteries sitting around, that's understandable. If you just want more range, there are some larger 36V packs available from Grin.. EM3EV has some too. At under 800W or so, I don't really see an advantage to higher voltages.
The chainline for a 68mm BB shell is 49.7mm., 52mm for 73mm BB shell. This is adjustable +/- 2mm with spacers to accomodate different chainring sizes and frame clearance and for Boost spacing. The kit comes stock with a standard narrow-wide 104mm BCD chainring.
Grantmac said:Still running the BAC500? What sort of torque figures?