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HomeAircraftHelicopterBeginners Corner › holding a hover w/ a D-fly 35
02-07-2006 06:29 AM  12 years agoPost 1
rushpilot

rrVeteran

Brewer, Maine

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After i get the heli to a hover(unstable hover due to the fact I'm still practicing)it gets up to 3-4 feet and then wants to drop back down to the ground. What's causing this and how can I fix the problem?

“The helicopter is evidence of how man's imagination can be given physical form.”

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02-07-2006 06:11 PM  12 years agoPost 2
Wisdom-Seeker

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Danville, CA

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You might expect this kind of behavior. Once your heli moves above ground effect, you will need to increase the collective to create additional lift to keep your altitude. Remember, hovering well means constantly controlling the collective as well as the cyclic.

A word about ground effect. When a heli is hovering, a donut shaped vortex develops around the main rotor. The inside of this vortex is blowing downwards, stealing lift. When you get close to the ground, the ground interferes with this vortex, giving you additional lift. You get the same effect in forward flight, where moving away from this vortex gives you additional lift. This is called translational lift.

--

Wisdom-Seeker
Protest letter to insurance co.: What do you mean "Act of God"?

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02-07-2006 11:08 PM  12 years agoPost 3
rushpilot

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Brewer, Maine

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Thanx for the info. I'll keep practicing to stabilize the hover. Today I managed to reach an 8-10 foot hover and the helicopter seemed to be a little easier to stabilize!

“The helicopter is evidence of how man's imagination can be given physical form.”

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