Timeline for Why aren't electric bikes mainstream?
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 18, 2022 at 6:38 | comment | added | nightrider | 1 RPM under power, that would be required without gearing maybe only an engine of the steam locomotive could do. There are gears in the hub of E-bike, bringing the range close to the human range. | |
| May 3, 2018 at 19:26 | comment | added | juhist | Torque is only one part of the story, RPM is the other part. Although max torque is produced at 0 RPM, to produce power, you need high RPMs. Just for fun, I found specs of one diesel electric locomotive (sze.hu/~szenasy/VILLVONT/Diesel-Electric_Loco_SD90MAC_EN.pdf) and it has electric motors with max speed 3435 RPM. Also, locomotives are hardly the location of weight-saving. To save weight, you want to bump up the RPM from 3435 RPM to much higher values. | |
| May 3, 2018 at 19:07 | comment | added | StackOverthrow | Electric motors can produce their maximum torque at any RPM, including 0. That's why diesel-electric locomotives are a thing. | |
| May 3, 2018 at 17:55 | comment | added | Martin Bonner supports Monica | But most ebikes are limited to 250W. | |
| May 3, 2018 at 17:23 | comment | added | juhist | @MartinBonner In the crank area it's even worse, since RPMs at bottom bracket are lower than in the wheel hub. The only reason the BMW motor works is that it's limited to 250 watts only. | |
| May 3, 2018 at 15:56 | comment | added | Martin Bonner supports Monica | The motor does not need to be in wheel hub. For example: theeverydayman.co.uk/blog/bmw-cruise-electric-bike | |
| May 3, 2018 at 15:32 | history | answered | juhist | CC BY-SA 4.0 |