At 12:49 21 August 2013, kirk.stant wrote:
On Wednesday, August 21, 2013 7:34:46 AM UTC-5, Steve Leonard wrote:
But, if your plane has flaps that deflect much, the "approaching stall
an=
gle" for flow relative to that fixed probe changes. A bunch. I would
haza=
rd a guess that if your plane has flaps that go 30 degrees or more, and
you=
set the "warning" point for adequate warning with thermaling flap, it
will=
never go off with flaps 30 or more. The calibration shifts whith flaps.
=20
=20
=20
Not saying it can't provide some warning some of the time, but if your
sh=
ip has flaps, expecially larger deflection flaps, this 5 hole probe is
NOT
=
going to do what you want it to without some flap position input to the
sys=
tem for sounding the alarm.
=20
=20
=20
That's my nickel's worth (Inflation, Neal.) :-)

Of course, but that really isn't a big deal, really - you establish the
cal=
ibration curve for a few selected flap positions and display accordingly.

=
No hardware change in the probe or display, a flap position switch, and
som=
e software in the computer/display.

Way better than what we have now!

Kirk
66

I have the best stall warning device ever - the glider. Nose high attitude,
low airspeed, rearward stick position, shuddering, reduced effectiveness of
controls. Zero cost and complexity.