Constant Speed Propeller

You know Rotax could make all of this just go away if they’d offer a turbine engine with a C S propeller with the same fuel consumption and price point as the 912.  Jeez. How hard could that be 😀

Hi Jim, small light turbines exist (think generators for example) the problem is you save weight but the fuel burn is much higher, about 3 to 4 times more.  This is by the design.  The weight you save is great since you will need that to mount huge fuel tanks. 

Cheers

Person A: “I wish there was a restaurant that would offer a porterhouse steak for the same price as a hamburger.”

Person B: “There are restaurants that offer a porterhouse steak on the menu, but they cost more than a hamburger.”

Person C: “Thanks!”

Person A: 😑

The original question - was about the optimum setting (with rational), for a constant speed prop,in Cruise, to minimise engine stress/wear, fuel consumption. In my view this has not been answered😈

Sean Griffin wrote:

The original question - was about the optimum setting (with rational), for a constant speed prop,in Cruise, to minimise engine stress/wear, fuel consumption. In my view this has not been answered😈

Perhaps, if you operate within Rotax's stated parameters, there is no significant difference in wear. As for fuel consumption, it seems like you should be able to measure that for your own particular installation.