Cindy, perhaps you would address that bit of nonsense in the Private Pilot
Practical Test Standards about no-spoiler accuracy landings. (I've always
thought it was there in order to make the PTS 2-33 specific.)

Bill Daniels

"Caracole" wrote in message
om...
Aerodynamics 101.
Parasitic drag as a topic.
If you truly want down fast, a slip is not the most effective tool.
AS-K 21, full spoilers deployed and 90 knots airspeed will descend at
4000 fpm.
You are below both maneuvering and rough air speed.

Slipping turns are a useful tool. They should be understood.
So should parasitic drag. Try it at altitude. Carry a GNSS recorder
(GPS logger for us unruly Americans). Analyze the data later about
how much sink rate you manufacture.

Don't believe it? Come fly with us. Or watch from the ground if you
wish. It works for everything from 1-26s up to Nimbus 3s and all the
standard class stuff inbetween. There are no too-little or
ineffective spoilers, just mild differences in sink rates.
Now, the AS-W 12, that's a different story.....until they fitted a
fitful drogue chute. Or the Carbon Dragon.

Slipping on approach to landing (or anytime), pitch attitude is your
friend for airspeed control.

Cindy B
www.caracolesoaring.com



What speed did you use? Could you have just used full
spoilers and
spiralled down at 90 knots or so (or faster, if air
was smooth), and had
the same descent rate?
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Eric Greenwell
Washington State
USA

80kts in an ASK-21, but who knows the accuracy of
an ASI in a slip? I was turning to the left with full
right rudder and the nose as far down as I dared; the
noise was tremendous.