Why on the move?
Thread Starter
Joined: Dec 2005
Posts: 47
Likes: 3
From: london
Why on the move?
Having just watched a seaside rescue programme I have a question. It always seems when helicopter winching takes place the boat and helicopter are on the move! To my ignorant way of thinking it would be easier if the boat and helicopter kept still! My greatest respects to all helicpoter pilots especially those involved in rescues.
Joined: Sep 2002
Aviation Qualifications: CPL
Posts: 4,721
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From: Great South East, tired and retired
Because the downwash from the helicopter can blow the boat around. If it is under way, it is better able to steer a straight line and the chopper can stay overhead. It also gives a bit of stabilising airflow which also helps a bit with power requirements. A minor bonus is that it leaves some of the downwash wake circles behind, and these expanding circles give the pilot the visual impression that the aircraft is moving backwards.
Joined: Aug 2006
Posts: 418
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From: Below Escape Velocity
Sometimes it's a necessary evil to winch to a DIW (Dead in the Water) boat, though it's seldom pleasant. Nope, give me ten knots of wind off your port bow if you can... makes life much easier for all concerned.
