Wheel Chocks, Yak 52, pair
Digs into the ground, tang unlocks with a yank of the Lanyard.
Try climbing over these babies on a ground power test.
You can't do it.
Now your ground crew can salute as they release you for the next sortie.
Clear the screws!
Or if you are escadrille Normandy Niemen, that would be 'Personne devant?"