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11-13-2005 04:35 AM  12 years agoPost 1
dhc8guru

rrApprentice

Fort Worth, Texas

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I am experiencing some strange tail rotor authority. If the helicopter is in flight in such a position that tailrotor would be under the most load, I lose control authority, but only when trying to control in a clockwise rotation(most torque demand). The the more right rudder I input, the more the heli try's to "weathervain" in the opposite direction. This is not a consistant problem where it will always happen. A good example of what is going on is if I am hovering and try a full power climb, the gyro acts as though it either can't keep up or the tailrotor does not have enough strength to counteract the torque.
No belt slippage or drive slippage, all checks out ok. This problem just may not be a problem but rather a limit of the tailrotor and I am just beginning to notice it now that I have become more proficient with flying the Heli towards its limits.
Even more strange the T-Rex heli model on my reflex sim does the same thing.
AON 3500 align 25a ESC
Align gyro 95% gain

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11-13-2005 10:03 AM  12 years agoPost 2
NitroJunky

rrNovice

Rockhampton QLD Australia

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Make sure you are getting FULL travel with your tail slider. Don't be too concerned if it actually strikes the gearbox or the blade holder. Also make sure your head speed is high as this will naturally give you a much higher tail rotor speed.

If you ain't crashin', you ain't tryin' 'arrrd enough

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11-13-2005 10:57 AM  12 years agoPost 3
fran

rrVeteran

HONEA PATH, SOUTH CAROLINA

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I'm experiencing the same situation with both the HS50 and the HS56.
I'm thinking that neither has the torque to compensate a high torgue or sudden stress,ie: "Top Hat" FAI manuver...I've increase my ATV (JR) to 150% and it helped; but a strong climb out with sudden stop still produces an over compensation of the TR.

Still looking for the perfect tail rotor servo for my 450 XL CCPM (blinged to the "gills").

FRAN SR. ( FAI-F3C)

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11-14-2005 08:42 PM  12 years agoPost 4
dhc8guru

rrApprentice

Fort Worth, Texas

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I think it is a servo torque problem. It seems that the more rudder control I input, the worse it gets. I am not hearing a loss of headspeed which I would expect some if the tail pitch was increasing and putting more load on the motor. If I hold a consistant left tail input, and then slightly back off the power I regain tail authority. Maybe it is as simple as the tailrotor blades aren't large or efficient enough under certain high torque loading situations.

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