Quote:
Originally Posted by flatbutt
"Whisper mode" has always intrigued. Does it actually exist?
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No.
The biggest sound generation from a helo is the aero noise from the main rotor blades interacting with the tail rotor. Very noisy.
I worked on Comanche Program and they went Fenestron tail rotor. I loved that aircraft. The best cockpit I have ever sat in.
Tail rotor from the bin Laden raid:
I have no idea.
You can quiet them, but helos will never be "Stealth". These type f articles make me smile:
https://www.popsci.com/story/technology/osama-bin-laden-raid-anniversary-stealth-helicopters/