wrote:

I teach the use of approximately 1/2 spoiler from a point abeam the
touchdown. This uses "safety altitude up at a rate proportional to distance left
to touchdown thus providing a fairly constant rate of descent and pretty much
constant height margin. This assumes steady airspeed selected for conditions.
Adjust spoilers moderately for changes in angles to the touch down
point.
On final, the effect of spoilers changes. In the early part of final
, they are rate(and angle at constant
speed) of descent control. As we transition into the flare and touchdown phase the spoilers
become rate of deceleration control thus determining when the glider no longer has
enough speed to fly.

How do you use the landing flaps on something like an ASW 20 or 27? Use
them only on final? Save them for situations where spoilers aren't enough?

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly
* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org