It seems that yaw, more than pitch or roll, creates the greatest wing asymmetry in a spin. If the spin progresses to the point where it cannot be broken, some aircraft are equipped with parachutes to try to stop rotation and to get the nose pointed down. Some cannot be saved.

Tail rotors work well in helicopters, and are part of the design to control the (spinning wing) rotor yaw, and, such as the 180 knot MH-65 Dolphin, have the rotor built into the tail to save drag.

Could this work as a safety feature for GA aircraft?

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    $\begingroup$ Probably unrealistic, think about the weight and complexity. Some sort of one-shot rocket pack might work, but probably better for deploying a recovery parachute. In some future fixed wing multi-propellor electric design you could more readily have distributed thrust but you're also more likely to see software that tries to prevent getting deeply into trouble in the first place. $\endgroup$ – Chris Stratton Jul 11 '19 at 15:11
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    $\begingroup$ That would be a monstrosity in search of a cause. Even airplanes not certified for spins will recover all by themselves, or with correct inputs, if you don't hold them in the spin for several turns. $\endgroup$ – John K Jul 11 '19 at 15:11
  • $\begingroup$ If? Perhaps if we had a number on the torque required to break a spin, an ELECTRIC (not rocket) may be possible. If reading about a Cessna 152 going flat (they really had to try) it was a thought. $\endgroup$ – Robert DiGiovanni Jul 11 '19 at 17:36
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    $\begingroup$ @Robert DiGiovanni: Re "they really had to try", why add weight and complexity to airplanes in order to try to save a very few idiots from the consequences of their own stupidity? $\endgroup$ – jamesqf Jul 11 '19 at 17:55

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