|
If you want to do it cheaply (relatively) I think the only choice is a trailer with a belt or chain driven wheel with a scavenged 48V golf cart motor with controller. There would have to be a freewheel in the drivetrain as close to the wheel as possible. I would look at it as acceleration assist for commuting short to mid range distances rather than a full time electric vehicle. Get 8 T105 Trojan batteries and charge them at home. If you are going long distances, leave the trailer at home.
Whatever you do is not going to be cheap. If you are looking to do this mainly to learn the electric theory behind it, you might build an electric bike instead. Even that is not going to be cheap.
|