Originally Posted by
Ewfflyer
Jet's don't need counter-rotating as it's pretty much just direct thrust.
I get what you’re saying about the direct thrust, in that you probably don’t have the “spiraling” slipstream that props have, but since each blade is an airfoil, wouldn’t the same principle apply, and the down-moving blade take a bigger bite out of the air? Or is it a case where by the time the air gets through the various stages of the jet engine, the thrust is uniform on the left and right side of the exhaust pipe?
Originally Posted by
rickair7777
Turbojets don't make as much drag as a prop when windmilling. They are designed to be efficient at very high rpms, which means they don't do much energy transfer at windmill speed...I think a lot of the air just flows through with minimal drag. Also frontal area is much less when compared to power output...so the good engine's power can easily overcome the frontal area drag.
I have a hard time following this one. My Seminole has 2 blades that form a “disc” when windmilling. That causes immense drag. A
turbofan engine has maybe 30 blades. All those blades form a more complete disc when windmilling. I don’t get how a similarly sized prop would create more drag.
When you say the jet is more efficient at higher RPM, do you mean that the blades take a bigger bite out of the air as RPM increases?
Originally Posted by
aviatorhi
Now talking about "correcting how a piston pilot does", for the most part we do, all twin turbine have a VMC, but we also have a higher speed envelope that we can achieve on one engine, which mitigates most of the problems.
That’s pretty funny. I’ve never heard anybody talk about that. Can I expect the Captain to be saying “more right rudder” as I do my first takeoff during IOE?
Sorry for all the questions guys, but they just don't teach this stuff in small-airplane school.