3Dreaming wrote:BrianL99 wrote:Nomore767 wrote:
In any airplane with a fixed pitch propeller will change RPM with pitch changes. The direct drive engines have a smaller change in RPM than the Rotax because of the gearbox. When you factor in the 2.43 to 1 gear reduction you will find the change in propeller RPM is about the same.
What I tell students is set the RPM and don't try and chase it. Just fly the airplane. I will pull the power back a little if the RPM gets into the yellow.
That's interesting. I wasn't all that aware of the fluctuations of a fixed pitch prop. I had less than 50 hours experience with a fixed pitch before I bought my LSA. The Cirrus prop has a "clutch" and reacts differently to pitch.
Why are you reluctant to run a Rotax in the "yellow"? Rotax says the engine will run forever under 5800 rpm's.