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Old May 18th 20, 02:25 PM posted to rec.aviation.soaring
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Default The aerodynamics of a towplane in a kiting glider situation

On Monday, May 18, 2020 at 2:40:26 AM UTC-5, Marton KSz wrote:
I found this diagram last week:

https://photos.app.goo.gl/nLpWwLHFmgwE5dEM9

Here's my interpretation:


Great picture for discussion, but it is lacking a critical part of the aerodynamics at the glider.

Consider recovering from a slack rope situation with nose a little high and a bit above the tow but still in sight. If you do it with a jerk, there is a sudden lot of force in the tow rope pulling the bottom of the glider forward and down. Given that the CG hook is below the center of lift, this puts a pitch up torque on the glider. Even with the pilot putting stick full forward, some gliders can go quickly into a nose high attitude with the elevator stalled.

At this point, the only glider control inputs left are to lean forward to move the CG or pull the yellow handle.

An ounce of prevention is worth a pound of cure.

Stay lowish and don't take up slack nose high. Understand this sequence and no matter what happens in the cockpit, fly to avoid it. If all else fails, be ready to use the yellow handle.