P2002 Sierra, propeller with two o three blades.

[sierpe]

Dear pilots, I have a Tecnam P2002 Sierra Deluxe, with a Rotax 912 ULS3 that move a Hoffmann propeller HO-V352F1 with a hydraulic governor, it is running well, but I need to make the overhaul of the propeller, the cost from Hoffmann for the overhaul is more expensive that a new fix three blades DUC propeller, our mechanical guy sugest me change the propeller for a fix three Blades DUC propeller, and I am not sure that with a fix three Blades, the efficiency of the propeller will be best respect the current solution, I will apreciate your commentaries, experiences or test to understand better if could be better change or not.

Thanks in advance.

BR

[John Crone]

I'd never give up the CSU. There are just so many advantages including shorter take-off. better climb performance, more economical cruise and increased descent rate. I changed from 2 blades to 3 and didn't really notice much difference. Theoretically 2 blades are more efficient bit 3 run more smoothly and you can reduce the length a bit. My system is Airmaster with Whirlwind blades.

Attached is a report from Airmaster that might help. Comparison of Fixed and CS propellers.pdf (736.63 KB)