Machine-translated by Google. Questions are authored in English.
Top

Discussion

A propeller becomes unsuitable at high subsonic speeds because

  • A.The blade tips approach and exceed the speed of sound
  • B.It cannot be geared to the turbine
  • C.It produces no thrust above 200 knots
  • D.It requires too much fuel at low speed

Answer: A

Tip speed combines rotational and forward velocity, so compressibility losses set in well before the aircraft itself is transonic. Swept and thin blade designs push the limit higher, which is what makes a modern turboprop competitive to around 400 knots.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.