Thread: Dumb Question
View Single Post
  #1  
Old December 19th 06, 09:04 PM posted to rec.aviation.rotorcraft
JohnO
external usenet poster
 
Posts: 120
Default Dumb Question

When designing rotor systems, you have to keep the tip speed subsonic
to prevent all sorts of problems and losses that would otherwise occur
at the sound barrier, right?

What about large turbofan engines such as on modern airliners? The fan
tips must be travelling at many orders of magnitude faster than the
speed of sound? Why are they not subject to the same limitation?

Just wondering.