At 14:00 30 September 2005, Jmarc99 wrote:
It seams that everybody miss the right question in
this thread.. What
is the right airspeed to decide to get, when the wind
is NOT perfectly
alligned with the runway?

When you have 15 knots wind, with gusts at 20...

at 0 degree with the runway , you'll calculate 1.3
Vs + 15, right ?
at 45 degree ... calculate 1.3 Vs + 15, right.. maybe
?
at 90 degree ... calculate 1.3 Vs + 15, right.. no
?
at 135 degree ... calculate 1.3 Vs + 15, no.. right..
maybe ?
at 180 degree (wind right from the back) ... calculate
1.3 Vs + 15, always?

or 1.3 Vs + 20 knots at all times, whatever the wind
direction with
the runway ? Or only 1.3 Vs when the wind will be
at the back during
the final ?

The questtion is.. WHAT IS THE CALCULATED SPEED
do you wish to get during the base and final, according
with
the wind angle with the runway. Do you take care the
gusts speed
or not in your calculation ?

Is anyone can answer that simple question?

jmarc..

Given that the above calculation is made with regard
to the surface wind and that as far as the glider is
concerned until it touches down the direction of the
surface wind is of no consequence to the aircraft
(the relative airflow experienced by a flying glider
has no connection to the wind direction) I fail to
see why the question is being asked. The simple answer
is you have made the calculation based on the windspeed.
Why do you need to worry about your groundspeed once
you have touched down?