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Old January 11th 14, 07:35 AM posted to rec.aviation.soaring
Chris Rollings[_2_]
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Posts: 133
Default Why don't flight computers adjust STF for wind?

If you are gliding from one thermal to another, optimum speed is the same
whether you are going into wind, downwind or no wind, it just depends on
the rate of climb achieved in the next thermal. If you are gliding to a
point on the ground, final glide or round a turn-point, then optimum speed
will be higher into wind than downwind.

At 19:10 10 January 2014, Kevin Christner wrote:
My understanding is that modern flight computers (which seem to have 10X
mo=
re features than anyone could possibly use) don't make adjustment to STF
ca=
lculations for the wind. From my reading of recent "authoritative"
sources=
(Brigliodori, Kawa) it is optimal to increase speed into the wind and
decr=
ease speed downwind, relative to non-adjusted McCready. Also of critical
i=
mportance to me would be a final glide optimizer. Currently when making

a
=
final glide I "move the dial" up and down in McCready speeds as I get
close=
to final glide. Often changing the McCready value up into the wind and
do=
wn with the wind leads to lower required altitude.

Am I missing anything?

2C