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The no big acCount of Monte Carlo 𓉡
@solarpunkfox.bsky.social

The classic 5:1 ratio, I had a 5kw golden motor axial flux that needed such a reduction and it really makes it tough. Do you think there’s room in the design to get the KV down on the motor or is mechanical the only way? Now I’m thinking about a sun and planetary gear reduction on the motor 🤔

Birdbrain
@birdbrain.engineer

Reducing the air-gap would be a big boon to reducing KV and increasing KT. Planetary gearboxes are a fine choice for e-bikes... I just didn't want to have to figure that out for this video😅

The no big acCount of Monte Carlo 𓉡
@solarpunkfox.bsky.social

I understand that. Since you’re thinking MTB maybe go all suspension with a jack shaft at the pivot where the motor gets reduction to the jack shaft on one side and the other side sees the pedaling force. I’ve dreamed of a monocoque frame housing battery and motor based on this bike.

Birdbrain
@birdbrain.engineer

Haven't settled on what kind of e-bike motor I will make next - won't be happening this year anyways, so time to sit on it and think about it :> But it will likely be done with a trail bike in mind, yes.