I have now been toying with the idea of making a nitro engine dyno. But I am having some trouble in just a few areas... Right now it is set up so that the nitro engine sits on a stand and has a gear mounted to the crank in front of the flywheel. The gear meshes with two electric motors. One motor has a 7.2V battery hooked up to it for the purposes of putting a load on the engine. The other motor is "SUPPOSED" to measure the RPM of the engine. The whole point is to have the engine being dyno'd stall when a specified load is place on the engine. The rpm of the engine at the point where it died would be the torque @ rpm point. Now do the test at every 5000 Rpm and you have a nice bell curve graph to display everything you need to know. As we all know already you can figure out horsepower from that. Ok, back to the problem, I am using a multi-meter to measure the amount of voltage comming from the "RPM motor" and converting it into the RPM reading. And the same is applying to the amount of torque the "Stop motor" is putting out. I just need some help determining how much voltage is what RPM and What torque. Now I know that there are many of you out there that deal with electric and do some serious modding. Is there a different way to measure the amount of torque or rpm coming from the Motors. Is there a better way. Any Ideas would be greatly apreciated. Since the Ultimate task at hand is to build an OS .15 CV-R that puts out 2.5 HP. Or at least that is the challenge. LOL. Input would be greatly appreciated.