That’s part of the problem, there’s one person I know with a kart dyno around here (Noah Stark at NSEW) and he’s pretty busy. Probably worth noting that I’m not nessacarily looking for engine builder type results, at least not at the outset.
Inertia type is off the cards from a portability standpoint, even for a small engine it takes a pretty big mass and those seem to run $1000 alone + fabrication of the dyno frame etc.
You can run up and down the RPM range with the hydraulic dyno, but you need a means to control it electronically. That’s the main thing I’m trying to figure out right now… what components do I need for such a controller system.
Heat is a big factor of course, but I’m going to cross that bridge as I come to it and add extra cooling as needed (Engine and dyno)
OK that makes sense. Battery power is always doable. I’m resisting the urge to research using motors (or load cells) for now.