Quote Originally Posted by BillTodd View Post
a simple way to measure torque is to use two indexing discs (opto or magnetic pick-up) separated by a torsion spring (a thin rod or shaft).
Do we really need brake horse power? Couldn't you just wrap a bit of string round the pulley, tie it to a spring then see how far it gets before it stalls?

You could then calibrate the spring by tying it to a horse :naughty: