'Knowing' that their aircraft stalls at a certain speed has killed many
pilots.  In fact it's possible to stall an aircraft at any speed because
stall is about angle of attack, not airspeed.  The quoted stall speed for
an aircraft is usually calculated when the aircraft is straight and level
and if you're lucky at max weight.  Bank the aircraft and the stall speed
goes up.  During low speed manoeuvring (e.g. turning onto final) you might
be a lot closer to the stall than you realise, even though you're well
above the quoted stall speed.  Get a little bit slower than usual and bank
a little harder than usual (e.g. because you overshot the centreline) and
you might find yourself spiralling into the ground.

Here's a question though.  The AOA probe is fitted to one or other wing.
But an inadvertent spin such as I've just described is caused by one wing
stalling while the other is still flying.  Does an AOA probe fitted to one
wing detect an impending stall situation equally for both wings?  Or should
it be fitted to the left wing on the basis that the turns in the circuit
are usually left turns and it's the inside wing that's more likely to stall?


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