Polar with spoilers extended?

On Oct 22, 2:23 pm, Alastair Harrison
wrote:
I was also taught this technique on a basic instructors course (in a
G103). But I'm always left thinking that it requires a high level of
skill to judge the roundout correctly. Leaving it just a second too
late would result in a rather rapid meeting with the ground. I think
I'd rather take my chances with a side slip.

Perform the dive recovery in two steps:

Diving with full spoilers and 80-90 KIAS, do a fairly sharp roundout
at 50-60' (a wingspan, at least) above the ground. Then, while still
holding full spoilers, set up a glide angle similar to what you would
get if flying final at normal speed. Airspeed will continue to
diminish, and when you have reached the target airspeed, still
slightly above where the normal roundout would be, reduce spoilers, if
necessary, roundout and land.

Do not attempt to do the high speed roundout near the ground! Do it
in two distinct steps and all will be well. With practice, it may
appear you are doing it in a single step to a casual observer.

I don't demo this often enough to have a perfect picture in my mind
for explaining here, but I have not had any trouble talking someone
through the procedure in an ASK-21. And we do indeed end up stopping
at or before the 'normal' stopping point even though we turned final
at 800-1,000'.

-Tom