ceiling effect

[Phil]

Hi Alex

Yeah, I've had that problem too. Instead of cutting the throttle, try asking it to pitch or roll as you gently reduce lift. Breaking the "seal" on one side only usually gets mine to separate without plummeting to earth. Of course, then you have to compensate for wherever it decides to head off!

Flying mine into a roughened, 'Artex' ceiling killed one of the motors - punched the axle plum through the motor base. Flying the critters sure ain't as easy as the videos make it look!

Phil M1GWZ



On 27 Jan 2015, at 20:32, Alex Fraser wrote:

> Perhaps you have heard of ground effect in aeronautics?  That's were the ground provides a kind of cushion as it affects the lift of an airfoil.
> I've ran into an interesting situation when flying my micro quad copter in the house.  If you accidentally hit the ceiling the little critter will kind of sticks there.  If you reduce the throttle enough which would normally cause it to descend, instead it just stays on the ceiling.  To break out of this "ceiling effect" I've had to cut the throttle so far back that the craft free falls and since I cut the throttle and the only stability it has is from the different prop speeds it tend to tumble.  When I gun the throttle it don't mange to stop the little beast before it hits the floor.  It usually hit pretty hard and with the props at full power, so you often loose a blade when it hits.   The props have a small hub so that is the part that rides against the ceiling.  I think the clearance between the blade and the ceiling is only about a 32nd of an inch or so.  
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