Okay, I was looking for some sort of test to show that the transformer method has more starting power than the rotary converter.

Well this is what I came up with. I disconnected the centrifugal unloader on my 5 hp Champion R 15-B air compressor. For those of you who don't know what that is, here is an explanation. There is a unit on the back of the compressor pump where the crankshaft is. This unit senses the speed, or lack of speed, on the crankshaft. When the compressor is off the unit unloads the valves in the head of the compressor. This means that if you have 100 lbs in the tank, the air compressor can start and come up to speed, before the valves are actuated. The air compressor freewheels, so to speak, for the first second or two of operation. This makes it much easier on the motor, as the only load is the inertia of the pistons and crankshaft. Once the motor is running the unloader senses it, and then the valves go to normal, and it pumps air.

    Well I wanted to stress test the converters so I disconnected the unloader unit. Now if there is 100 pounds in the tank, the compressor is starting up against, 100 lbs. In some of the videos you can see that after I shut off the compressor, the pump suddenly goes backwards a bit. That is because the air is pushing back at the pistons. When the air compressor is off, I can not even turn the pulley because I am turning against the air pressure.

     In this video, we do this with the transformer converter, and it has no problems starting against the air pressure, right up to the maximum lbs I feel that I can safely take it, about 185 lbs.

Press Play button to start video!