crytes
Well-Known Member
If a PSRU is determined to be the most effective way to get power to the prop why not use a planetary gear based one and countra-rotate a prop. 5-15% efficiency gain over standard props is significant and the drawbacks of weight and complexity are already present in the PSRU. The net is more efficiency at the cost of more noise. I'm still researching the cause of the extra noise as I don't understand the source and suncraft claims thiers is quieter because of contra-rotation.
Sunflightcraft - Paraplanes - Airchopper - Rotax - Coax P - Microlights- Flugzeuge - Ultralight Planes - Ultraleicht Flugzeuge - XTC - XTS
Sunflightcraft - Paraplanes - Airchopper - Rotax - Coax P - Microlights- Flugzeuge - Ultralight Planes - Ultraleicht Flugzeuge - XTC - XTS