eBike powered by RC helicopter motor

[david tremaine]

My latest obsession is with figuring out how to build an electric bike.

Meanwhile, since the day I met him, Ray has taken advantage of every encounter we've had to evangelize on RC helicopter motors
and how powerful they are for their size and weight [I'm starting to understand why]

So I googled "rc helicopter ebike" it, and found this:
Matt Schumaker's DIY Electric-Assist Recumbent

Amazing write-up, with scads of pictures, design theory, ebike battery building (though not, sadly, from recycled laptop batteries),
home machine-shop show-offery, and a drool-inducing video warning: your tastes may differ. drool inducement not guaranteed

see how fast it goes!
(note: author says his belt drive was skipping here, and that "the bike is actually a lot faster.")

The rest of the host website looks to be chock full of interesting stuff (well, truly, I'm only 45 minutes into it,) like How to make plastic bubble fairings at home, cheaply