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Old April 17th 08, 03:25 AM posted to rec.aviation.soaring
Greg Arnold
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Posts: 251
Default DG Differences...

I think you are over-analyzing this issue. The difference between flaps
and no flaps is so small that you won't notice it. What difference does
it make if a recreational flight is 300 km (no flaps) rather than 315 km
(flaps)?

In contrast, you will notice if your glider is hard to rig, has a poor
trailer, or isn't comfortable or fun to fly. Those are the things that
you should be focusing on.



noel.wade wrote:
Thanks All,

On the flaps vs. no-flaps argument, I guess it would be best to use a
hypothetical situation:

Imagine you have cloudbases that are 3000' to 4000' AGL.
Terrain is somewhat mountainous, but the cloudbases rise with the
terrain (20 miles east of the airport you might have 7000' - 8000' MSL
bases over a 5000' MSL mountain).
The lift is maxing out between 4 knots and 6 knots, with a lot of 2 to
3 knotters mixed in.
The Cu are 4 - 6 miles apart.
Winds are 5 - 10 knots, with the best soaring areas downwind from your
home field (so you face a mild upwind glide home).
Your total "window" for soaring is a 5 hour period during the day when
conditions are going to be generating lift.
The lift is workable from 1000' AGL to cloudbase, but staying within
1500' of cloubase seems much more comfortable.

This is a pretty typical "decent" soaring day in Western Washington.

So the question for you flapped pilots is: Would you be pushing your
speed up enough in this situation to actually be using your flaps?

...Assume you're trying to do good cross-country flying - not super-
agressive contest-like flying, but also not just puttering around
within 15 miles of the airport either.

Thanks!

--Noel