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Question
A snap roll is an autorotation with rudder input and generally higher power or higher speed.

One wing is stalled in a snap roll, both wings are stalled in a spin. - Do you agree at all with this last statement?

Answer
Hi Steve,
Here is some facts from aerobatic association and their explanation of snap rolls.

Snap rolls also have to be flown normally on a straight line. A snap roll is similar to a horizontal spin. It is an autorotation with one wing stalled. Figure 1 shows the symbol for a regular snap roll.  Figure 4 for an outside snap. In the regular snap, the plane has to be stalled by applying positive G forces. In an outside snap, the plane is stalled by applying negative G. In both cases rudder is then used to start autorotation just like in a spin.

http://www.iac.org/begin/figures.html#Snap Rolls

While in spin we can state that, spin is an aggravated stall resulting in autorotation about the spin axis wherein the aircraft follows a corkscrew downward path. Spins can be entered intentionally or unintentionally, from any flight attitude and from practically any airspeed—all that is required is sufficient yaw rate while an aircraft is stalled. In either case, however, a specific and often counterintuitive set of actions may be needed for an effective recovery to be made. If the aircraft exceeds published limitations regarding spins, or is loaded improperly, or if the pilot uses incorrect technique to recover, the spin can lead to a crash.
In a spin both wings are in a stalled condition, but one wing will be in a deeper stall condition than the other.[1] This causes the aircraft to autorotate (yaw) towards the deeper-stalled wing due to its higher drag. Spins are also characterized by high angle of attack, low airspeed, and high rate of descent.

http://en.wikipedia.org/wiki/Spin_(flight)

So in short In accordance with aerodynamics, I would agree with latest statement
Ismar

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