Spin and flat spin
The pieces of yarn...
Here are the images of an attempted "scientific" experiment. I simultaneously filmed from the ground and with an on-board camera a classical spin, and a flat spin.
The wings are equipped with pieces of yarn in order to see the flow of air during the 2 tricks.
The flat spin was rotated with the madstab not too raised: this accelerates the speed of rotation and I hoped to clarify the flow as much as possible.
I must admit that I expected a more straightforward result. The pieces of yarn of the classical spin come off quite regularly from the airfoil. Those of the flat spin remain fairly flat, but in a centrifugal direction, whereas I was hoping for a back-to-front direction.
The images are therefore subject to your interpretation, they simply have the merit of existing at least once here, because it requires combining several things:
- a glider that can do flat and classical spins
- a pilot (:p) who can do flat and classical spins
- a cameraman or self-filming pilot
- an on-board camera directed towards the wing equipped with woolen threads.
I'm interested in any other similar experience!