Search results

Date Relevance Most replies

  1. T

    My first scratch build: 30kw full suspension tandem velomobile.

    Alright, it’s been a while since the last update, so I’ll give an overview of where things are at the moment: I have a rolling chassis with batteries, controller, and motor. Still need to work out front brakes, rear brakes, seatbelts, wiring (lights etc), and of course the shell. It has been...
  2. T

    My first scratch build: 30kw full suspension tandem velomobile.

    Thank you!
  3. T

    Idea for a high capacity e-bike using LiFePO4 12 volt batteries. Good idea or nuts?

    My rule of thumb for mid drive vs a hub motor: mid drives are better than hub motors (especially direct drive) for hauling heavy loads under 1500w, then once you start getting into the bigger hub motors like a qs 205 they stop caring about grades. I currently run a qs 205 in a 20 inch wheel (a...
  4. T

    My first scratch build: 30kw full suspension tandem velomobile.

    The nosepiece at the very least will have fiberglass to deal with the very tight compound curve, John Tetz found it to be necessary in his notes on the process. He also devised many ways to stiffen the shell with foam U beams and such. I’m sure I will need to experiment to find the right balance.
  5. T

    My first scratch build: 30kw full suspension tandem velomobile.

    Sorry, no build thread. Perhaps I will make a post about it. Here is a picture:
  6. T

    My first scratch build: 30kw full suspension tandem velomobile.

    Thanks everyone for your input. All good ideas sound crazy from the start. Good thing I am crazy enough to push forward with this, and if I fail, it will be a great example for everyone to learn from. The fin idea I think is a really good one actually. It solves 2 problems at once, visibility...
  7. T

    My first scratch build: 30kw full suspension tandem velomobile.

    Hello everyone, I have begun the process of building my car replacement. I have built a few bikes, including a hybrid electric one with a generator for effectively unlimited range, but there has always been a problem: E-bikes suck at being aerodynamic, and so are limited to below 30mph if you...
  8. T

    Help needed to add cruise control on my ebike

    You need to enable regen limiting in speed limit settings, but yes. I agree, it needs to be a button input to start.
  9. T

    Help needed to add cruise control on my ebike

    Speed based cruise control is already possible with a CA, just set the speed limit to your desired cruise speed and let the CA do its throttle hold function at full throttle. You can adjust the speed limit with an aux potentiometer.
  10. T

    Powertrain recommendations for a QS 273 powered faired trike

    Hello everyone, I have been thinking about building a 2 seater (inline seating to reduce frontal area) velomobile style tadpole trike, but with a massive hub motor to hit highway speeds with ease for extended periods. I estimate that it will weigh about 700lbs with 2 people in it. Target power...
  11. T

    Sabvoton 72200 e brake throttle wires

    It will not let you set it in the phone app regardless. You need the PC application to change that. Let me know if that works out for you or not. 🙂 By any chance could you tell me where you got that one? There are so many sellers… and anyhow I need a new one anyway now since I fried it with the...
  12. T

    Did a stupid: regen braking engaged when battery disconnected

    It won’t even turn on unfortunately, so it’s probably more than just the fets right?
  13. T

    Sabvoton 72200 e brake throttle wires

    In case you were curious, it was a hall angle issue
  14. T

    Did a stupid: regen braking engaged when battery disconnected

    Hello, I recently have bricked my Sabvoton controller because of my poor design choices. I had the regen engaged when my unlocked battery came loose. This caused some sort of voltage spike and the controller is now E waste. I am wondering if anyone would know if it is possible to fix the...
  15. T

    Sabvoton 72200 e brake throttle wires

    Thanks for the help on this. I’ll try and go through everything tomorrow and set it to what it should be. Hopefully I can get everything sorted out.
  16. T

    Sabvoton 72200 e brake throttle wires

    I suppose what I am trying to say is that the controller has gotten itself into a nonsensical configuration. I will have to look if it is possible to factory reset it, the option in the software I tried didn’t seem to help.
  17. T

    Sabvoton 72200 e brake throttle wires

    The controller literally decided to reverse on it’s own. I had just left it sitting and next I used it it was backwards. The brake switch will make the bike go faster.
  18. T

    Sabvoton 72200 e brake throttle wires

    Hello, The software has the option but won’t let me change it to that option, it just changes it back. Hopefully they will have the firmware. It’s also now decided to switch motor directions on it’s own and the e brake adds throttle. Hope I haven’t just wasted a ton of money
  19. T

    Sabvoton 72200 e brake throttle wires

    Hello all, I recently purchased a Sabvoton controller. Unfortunately, it appears that I have purchased the wrong variant. I would like to know if I can add in proportional regenerative braking functionality. If any of you have a Sabvoton controller with this capability, could you post a picture...
Back
Top