Silntknight
New Member
Good idea, but the load isn't adjustable. I think I'll just go in for some nice brakes (literally). Go to a junkyard and pick up a caliper/rotor setup and use that. I'd connect one motor as a generator turning the second. The shaft is connected to the rotor, and the caliper is used to provide a load. I can either use it with constant RPM, thus constant voltage and measure current, or I can go constant load and measure voltage based on varying RPM. I like the first for a true stress test and to get real torque/power curves, but I'd use the second for spark adjustment because seeing a change of 1RPM is easier than seeing a couple of mA.