Originally Posted by
Ascend Charlie
Then these "Experts" should know that it is far more efficient to accelerate a large amount of air to a low speed, then a small amount of air to a high speed, as well as the noise. Compare the noise and downwash disturbance from a 5-ton helicopter (S-76) in the hover to a Harrier jet.
You mean an 11,000 lbs with 1,100 SHP engines helicopter compared to a 23,000 lbs gross weight aircraft and rated jet engine?
Yeah, the noise may be different.