The pilots notes are genuine. The Spit was not allowed to be snapped/flicked. It would be reasonable perhaps to suggest that the reason might be the transportation joint immediately forward of the fin/tailplane. I make the suggestion as flick/snap maneovers were not permitted on the T-28 for that reason.
Snap/flick is not permitted on the P-51 either. The reason being that they do not do a good snap, and usually end up in a power on spin. The manual warns against making intentional power on spins because it may take up to six turns and 9,000 feet to recover.
Last edited by Brian Abraham; 18th May 2013 at 03:19.