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Old March 30th 07, 04:45 PM posted to rec.aviation.ifr
David Cartwright
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Posts: 16
Default Winds on approach

"kevmor" wrote in message
ups.com...
I'm not sure how I would've known the right power setting,
unless I used what I normally do, and accept the lower ground speed,
then adjust my descent for the ILS to a much lower fpm descent?


That's what I'd do. The key is that you're doing the things you do in the
right places, not at any specific speed. So as long as the places and
altitudes that you turn and/or descend correspond to what it says on the
approach plate, that's just peachy - it'll stop you banging into mountains
and whatnot. Yes, you'll end up with a lower rate of descent in order to
keep the glideslope needle centred, but that's perfectly normal.
Additionally, the POH says that you should approach at such-and-such a
speed, so do so - the wing doesn't care how fast the sky is moving over the
ground, only how fast it's moving over the aerofoil.

If you want to keep the power up for a bit longer than normal just so you
don't grow old waiting for the glideslope to come down to meet you, then
that's up to you. But by the time you're established on your approach, you
ought to be at your proper approach airspeed - once established it's a
non-trivial task to adjust your speed markedly, then fix the rate of descent
to compensate for all that thrust you just took off, all the while ensuring
you're still on the glideslope.

Assuming you're into a headwind, the groundspeed is largely irrelevant -
except that you'll wear the tyres out a little bit less than usual, and
you'll have further to taxi once you've landed, as the landing roll will be
shorter than usual.

D.