Quote:
Originally Posted by ODDJOB UNO
on these delta force/seal team helos there is a button in the cockpit, that when pushed...................puts them into "secret squirrel" mode and nobody can hear them and suddenly all identifying numbers/letters become invisible and the fuselage turns black.
the "official" explanation of the helo going down was overnight temps remained high and when helo pilot put it into a hover to allow seal team to rapid descend ropes, helo pilot lost "lift" due to air density.
now if ya believe that, well you'll probably believe the "secret squirrel mode" button in the cockpit story.
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It takes a heck of a lot more power for a Helo to hover, rather than moving in fresh air. You get turbulent columns of air being forced down from the blades, and the air cycles back up in another ring outside this colum. When a Helo just sits in the same place in the sky, this cycle keeps accelerating, resulting in faster moving air going into the blades. This means the power has to keep being turned up for the Helo to keep hovering. This is because the helo is now "paddling upstream" against its own power. If it was already stressed, it'd end up on the deck, no flat deck = wrecked helo.
This is why most helo's tend to try to keep some motion going, getting into fresh air. The lower to the ground you are, the greater the affect.