eBike Friction Drive Build

thingiverse

***Hello Internet! *** For those Safetiniks: Fusion360 200N Static Stress Report https://drive.google.com/file/d/12HJmyKJZrEjAlGoD3qjE8lSj54IgWQtF/view?usp=sharing This is an upgrade to my Brompton eBike Friction Drive, it is suitable for other bike frame with the common front fork mount for caliper brakes. See: https://www.thingiverse.com/thing:3760499 You will need this essential part: https://www.tredz.co.uk/.Brompton-Reflector-With-Fittings_210485.htm Build docs here: https://docs.google.com/document/d/1Bp1OWOW-BHIptmso75VmstHCjkk27gZrm52MQJ5cX-I/edit?usp=sharing Instruction for wrapping SBR around the motor for best performance See: https://docs.google.com/presentation/d/1FQdWPTe3nYMLmk8AB0c-IvsF8gwB6K-7bOEx_NRSsPg/edit?usp=sharing New upgrades includes: 1) Motor mount for Turnigy SK3 Aerodrive 6364 or 6374 190KV Brushless Motor See: https://hobbyking.com/en_us/turnigy-aerodrive-sk3-6364-190kv-brushless-outrunner-motor.html 2) New outrunner fan mount for the above said motor 3) Whilst fasteners are the same you need an extra bearing 4) Dimension tweak for the slightly smaller diameter of the SK3 6364 5) 3D printed washers If you're wondering what's the difference (in performance) between 6364 and 6374, the latter can handle higher power, but if you VESC is current limited (say 20 Amps), there's no noticeable difference. But if you have a high capacity battery, maybe a burn-out of your front tyres is possible :) Lastly, I have yet to figure out a better solution than using SBR rubber as contact surface to improve transfer of power from motor to tyre, or something that will last as long as those Schwalbe Marathon tyres. Any suggestion please leave comments. Most welcome!