Jmarc99 wrote:
You wrote that something like 90 degrees= nil wind. So if someone
do a slip in the wind direction in order to sayt alligned with the runway
during the final leg, the pitch angle of the sailplane is somewhere greater
than supposed! In this case, with 90 degree wind, the sailplaine have
to travel a longer way through the air mass.

Though, the sailplane fly more faster than supposed, and the pilot
doesn't use much airbrake! Is that what effectively happen in that
wind condition?

Jmarc


I'm not suer I understand the question properly.

My crosswind landing technique is to crab into wind, and then kick off
the drift after the roundout. This works fine for, say, a 10kt crosswind
at 90 degrees, and at that wind speed there's no real danger of wind shear.

However, if the wind is gusting 20kts or more at 90 degrees, that's
outside the demonstrated crosswind limits of my glider. Ideally, I
choose a better landing direction. If I had no choice (e.g. poor or late
field selection), then this would be one of those "interesting" landings
which test one's improvisational and piloting skills. I'd be using a
combination of crabbing and slipping, to give me less drift to kick
off,and I'd certainly add 10 kts or more to allow for gusts and wind
shear unless that seemed more dangerous than approaching at a slower speed.

I guess the point I was really trying to make is that if on every
landing you add extra speed for "safety", the result is that you never
learn to land with the minimum safe energy. This is a skill that I think
every XC pilot needs. However, in gusty or high winds, you have to allow
for the possibility of needing extra control authority or suddenly
losing 15kts airspeed through wind shear. So minimum safe energy
landings are for benign conditions.