AirCommandPilot
Just a fledgeling
- Joined
- Feb 24, 2014
- Messages
- 617
- Location
- Houston
- Aircraft
- Air Command Elite #003
- Total Flight Time
- 88
Does anyone know where I can get a rotax c-box with a 2.0:1 gear ratio?
GyroRon;n1121206 said:How much twist is in your Props blades now?
Adding blades is a solution, only if the problem is the current prop is maxed out pitch wise.
If you have say, 80hp and to absorb that Hp with the prop you have to add pitch to the blades to the point of holding RPM to where you want it. At a very high amount of pitch, the prop can actually be stalled and not able to make good thrust, especially at zero to 60 mph airspeed. If your having this issue, the solution is to do one of three things.... 1. Turn the prop faster ( by changing the redrive ratio ) 2. Add diameter to the prop ( not always practical on a gyro due to keel and rotorblade clearance ) 3. Add more blades.
I will say that Ivo makes different props for different power and applications. They have skinny chord, low HP, ultralight type props.... then they also have thicker chord magnum props made for higher HP engines.
My advise would be to find someone to loan you a 3 blade 68 inch warp drive and try that. I had a 69 to 70 inch 3 blade warp drive on my last gyro and it was powered by a 120 hp yamaha sled engine, and I tried several gearbox ratios with it. I can't remember if I ended up with 2.62 to one or 3.47 to 1. In either case, the warp drive was able to absorb the power without needing too much twist and therefore it was not stalled statically.
I am not a fan of Ivo props at all. I would sell it and buy a warp drive. and try your current set up.