Certification today does not include ability to recover from a fully developed stabilized spin. The required one turn recovery is only the incipient stage of the spin. Aerobatic aircraft have not been tested beyond six turns. Sources of Inadvertent Stalls Becoming Spins 1. Inadequate rudder application in steep climbs.
Climb power raises nose, decreases airspeed and increases P-factor.
False concept of air speed when on base due to a tailwind. Peripheral vision can sense the illusion and send it to the brain.3. Letting nose pitch up and airspeed drop when applying power. Having aircraft enter 'reverse command' area in pattern. A speed so slow and power so high that the only recourse is to lower the nose for flying speed.