Turn Coordinator - Speed error
Thread Starter
Joined: Sep 2024
Posts: 1
Likes: 0
From: Paris
Turn Coordinator - Speed error
Hi !
Frow what I have understood, a turn coordinator works thanks to the torque applied on its side (yawing).
This force is redirected at 90 degrees which makes it bank on the side (precession).
This bank is then calibrated by a spring to indicate if we are yawing at rate 1 turn (or not).
By reading the Oxford manual I came threw something I can't understand.
It says that if the gyro is underspeeding, it will underturn.
I would have thought that if the gyro underspeeds, its rigidity would decrease.
And as the rigidity decreases the precession would increase (and thus increase the indicated turn rate).
Thanks for your explanation.
Frow what I have understood, a turn coordinator works thanks to the torque applied on its side (yawing).
This force is redirected at 90 degrees which makes it bank on the side (precession).
This bank is then calibrated by a spring to indicate if we are yawing at rate 1 turn (or not).
By reading the Oxford manual I came threw something I can't understand.
It says that if the gyro is underspeeding, it will underturn.
I would have thought that if the gyro underspeeds, its rigidity would decrease.
And as the rigidity decreases the precession would increase (and thus increase the indicated turn rate).
Thanks for your explanation.
Joined: Jul 2019
Posts: 27
Likes: 16
From: Australia
The way was explained to us back in the day when others had the same thought - a spinning wheel resists force application, a stationary wheel doesn't, a wheel spinning slower than optimal is somewhere in between the two, so more prone to being pushed around by the changing attitude of the aircraft therefore under reading. Likewise an over speeding gyro will over read as it resists the changing attitude
