Uh...yes.


Considering in the Original posters picture, the HS cue is at 250 and the low speed cue is not even visible and the 180kt tick mark is becoming visible, I can say for certain it is at least 70kts IAS.

Also as Boiler pointed out, the shaker fired at 150kts in the PCL accident. so wala 250-150=100 kts. Also if we are splitting hairs the shaker isn't actually the stall anyway, jsut the indication of an approach to the stall margin, so the stall speed is a few kts less.

Been up there before, it works fine, if you the conditions are right and you don't try to "zoom climb" it up there and it is no where near 15-20 kts between low and high buffet

You won't stall it if you
1. don't zoom climb the thing up to 410. Stay on the front side of the damn drag curve.
2. Once up there, if the IAS starts decreasing you need to correct it asap...almost certainly by descending. People get in trouble up there by trying to salvage it and there is no way to get the speed back at that altitude other than to descend.

So yes that is my final answer...