Some fun from my model bretheren (I have 2 heli's myself)
Hehe, these guys decided to stop the rotor while doing an auto, and figured they would still have enough negative collective pitch (which models do have) to recover. I had stated that they would lose the bird, not from exceeding crit AOA on the blades, but because they would suffer blowback as the model then accellerated with stopped blades.
Well I'll let you see the video:
http://ronlund.com/hhsmall.avi
Blades departed shortly after stopping
Heli: totalled., a bummer, but made a nice video.
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Marc