No, you're certainly not alone. I've been trading email with JW privately
this morning.
Ramy, I agree with everything you've said here. I fly the same way.
FWIW, I never use a PDA for final glide... there's too darned many ways to
get it wrong and XCS seems to be exacerbating the trend here. I rag on
other aspects of the 302/303, but one thing it does pretty well is
calculate a glide to a turnpoint. It will also do a final glide with HW/TW
component wind which is *really* useful. and yet to be picked up by XCS.
Another thing I pretty much never do is take speed to fly information from
any instrument. You understand why!
There's a critical need in soaring software to separate speed to fly from
glide calculation that so far hasn't been met by anyone. It is often the
case that the fast (and safe) way home is Mc 1 or 2 speed to fly and Mc 3
or better on final glide. Likewise, speed on task need not be calculated
by your speed to fly Mc setting.
-Evan Ludeman / T8
On Mon, Nov 21, 2011 at 11:24 AM, Ramy Yanetz <[email protected]> wrote:
> After using XCSoar for a while I am very impressed with it but at the same
> time surprise that it assumes that everybody fly according to MC theroy and
> with pre defined tasks. Most pilots I know, which are serious XC pilots, do
> not set tasks and do not fly according to MC theory, which is way
> overrated. In most place in western US you will want to fly at low MC to
> stay at the sweet spot above the mountains and near the clouds. But it
> looks like XCSoar insists that if you don't fly according to MC you can't
> go anywhere since you can't climb, and that if you fly for OLC than you
> also have a task pre declared.
> Flying strictly according to MC is a guarantee way to land out often. An
> example from my last flight: release at 1500 feet, made 3 turns in 3 knots
> and hit the inversion at 2000 feet, next thing you know XCSoar tells you to
> dive to the ground at 80+ knots at MC 3. Instead of flying at best glide to
> stay aloft. And if I change to mc zero it assumed I can not go anywhere
> upwind since I can not climb. If so, how did I manage to fly 200km tip
> toeing from one thermal to next at MC between zero and 0.5?
> I think this is a flaw to assume this. Am I alone thinking this?
>
> Ramy
>
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