I haven't received the parts I need for the 65cc RimFire yet but the Ramoser Varioprop Arrived finally so I assembled it and tested it on the RF 50cc motor. It tries hard and actually gave me 4470 watts but the amps were too high at 170. Pitch was set at 16 inches for the first run and this would fly at 65mph top speed, too slow for a GS P 51. The next test I set the pitch at 11 inches and this dropped amps to 97.7, watts to 2905 and rpm went up to 5202 so that unloaded the motor too much. I am going to try 12 and 14 inch settings and it might be flyable but I really think the 65cc motor is the way to go. My friend Bill is holding on for dear life for this test run, He said that was the strongest pull he had experienced from this plane including the gas motors. He is about to lose his hat in the picture. I noticed this and shut it down so the hat wouldn't end up in the prop or worse. The video from the action cam is more impressive, it looks like he is leaning into a hurricane. I think this 4 blade setup is going to work just fine. Reports I got from other flyers using this prop claimed their planes reached flutter speed. I am going to set up for the top speed I am already getting (about 110-115mph) and let others go for higher speeds. Imagine one of these props on a big Hacker motor.
