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Old December 22nd 07, 07:07 AM posted to rec.aviation.soaring
Wayne Paul
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Posts: 905
Default AoA keep it going!


"Eric Greenwell" wrote in message
news:gi2bj.303$pi7.43@trndny02...
Nyal Williams wrote:
The inside wing; it travels a lesser distance while
sinking the same amount as the outside wing.

No one seems to have observed that the AoA is instantaneous
whereas the ASI indicates what the aircraft was doing
moments ago.


I don't think this is true: all the ASI I've had or checked seemed to
respond in less than a second. Surely that's fast enough to keep up with
the glider? Just try blowing gently into a pitot and see how quick the
needle is. If takes "moments" to respond, you should check the indicator
and the pitot line.

The reason we are told to "fly attitude and don't chase the airspeed" is
it takes the glider a while settle down to a steady speed, not because the
ASI is slow.

Eric,

Just a short observation. If you had an AOA you would notice an AOA
increase as you open your spoilers while maintaining a constant speed and a
decrease as you closed them.

Wayne