Close shave during C150 spin.
Experienced instructor. He asked student instructor to patter a spin recovery - they climbed all the way to 7500 ft agl. After two turns he said recover, and despite correct recovery actions (except he relaxed on the backward pressure instead of placing wheel well forward of neutral), the C150 continued spinning. Despite several attempts to recover by the instructor the aircraft did not recover until around 1500 ft when it came out of the spin. The instructor felt that the problem may have been in the initiation of the spin when he forced the aircraft into the spin before it had actually stalled. Has anyone else struck a problem with C150 recovery times and anything unusual about the spin? The significance point of the spin which I described, is that it had only gone through 1-2 turns before recovery action initiated. I can understand that it is asking for trouble if recovery action is delayed until after 4-5 turns because it can flatten.