With an increase in forward velocity of a helicopter, the increase in parasitic drag will cause the fuselage attitude to
- remain level.
- pitch down.
- pitch up.
Explanation
As forward speed rises, parasite drag on the fuselage increases and acts rearward, generally below the rotor thrust line. This drag produces a nose-down moment, so the fuselage attitude pitches down, which is also assisted by the forward disc tilt needed for speed.
spyrosair1 asking:
Can some body explain this to me or give me a reference?thank you.
Community Comments (1)
T
trap2307 Posts: 43 04.03.2013 / 14:42
Hello!
When helicopter increases in forward velocity, nose of the fuselage is lower than tail, because of that air flow tends to lower the helicopter down.
http://img404.imageshack.us/img404/1184/helicj.jpg
When helicopter increases in forward velocity, nose of the fuselage is lower than tail, because of that air flow tends to lower the helicopter down.
http://img404.imageshack.us/img404/1184/helicj.jpg
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