Re:See Thru Jet Engine [video]
by mlsu on Monday July 18, 2022 @11:45PM
(#32147317)
I think turboprops are less efficient, because at high airspeeds, drag is created by vortices generated at the tips of the blades, which are exposed to the free air.
By contrast, the cowling around a turbofan prevents such vortices from being created. Ducted fans are, in general, a more efficient design because of this.
Re:See Thru Jet Engine [video]
by subhro on Tuesday July 19, 2022 @01:00AM
(#32147713)
Turboprops indeed fight wing tip vortices. But they also have a problem of not being able to shape air properly like Turbofans can do with stator vanes and such. As you stated, ducts are awesome.
By contrast, the cowling around a turbofan prevents such vortices from being created. Ducted fans are, in general, a more efficient design because of this.