Is there a way to tell visually if a Tracy psru is a -B or C (? I think that was the designations?). How many models of psru's did he build? Which had what ratios?
Do we have that info somewhere?
There is a 13 B engine with Tracy's EC2 and EM2 for sale with a psru I'm sort of interested in. But no documentation. I think it was pulled from a Velocity project.
MW