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The 'Hanno Screw' is a knife edge spin, is it not? Not really the same thing at all, sorry.Steve
Have you got video so we can compare?
sorry, no, it may be somewhere on Youtube, but maybe a better aerobatic pilot than me can comment...
certainly looks like it to me, and is entered the same way! The spin centres around the down wingtip.
And - to confirm - this was done by a glider, on the slope?I know this and much more has been done with powered planes - but that's quite missing the point, is it not?
Sizzling- I had mate who could do it perfectly with a standard Galaxy Mystic! The model spins around the lower wingtip.
any mileage in having a forward rudder...ie the nose of the fuz hinged and acting in the opposite direction to the rearward rudder?
Another idea would be trying wights at the tail and nose. If the rudder has enough force to get the spin going the momentum in the weights might (it does in my head) keep the spin going longer once there is no airflow over the tail during the spin
or servo operated sliding weight for a variable cg