Sounds like most of the repliers prefer the conventional way of calculating
arrival altitude without assuming that the only lift I will find along the way
is 0.5 knot since I am using conservative STF and that I will be silly enough
to circle in it while drifting more than climbing. I can't imagine why someone
would prefer it this way but I realize that there will always be opposite
opinions.
So the conclusion is to make it configurable. I am concerned that such a
critical change was made without making it an option.
I would like to request that any enhancement made going forward will be
*always* made configurable if it will change any existing behavior. This is
crucial to make XCS safe and reliable.
Turbo, please let me know if I still need to open a ticket. I think this
should be fixed ASAP, I personally wouldn't want to fly with it again this way,
after almost picking up an alternate landing believing XCS which was telling me
there is no way I can make it... I may need to switch back to my old PDA
running WinPilot until this bug is fixed..
Ramy
On Nov 21, 2011, at 7:05 PM, Sascha Haffner <[email protected]> wrote:
> Hi,
>
> regarding speeds to fly - I use my LX5000 for speed to fly indication (beep
> sounds) and therefore I set my best guess for MC at the LX5000 (Cambridge
> etc). XCS I use with a safety MC value (higher, than the MC in the LX) with
> Vers. 6.0.10 (old solver) to give me conservative values of AltRequired /
> Arrival Height. While comparing the arrival heights of the two instruments
> it gives me a nice redundancy (using even two GPS sources, Flarm and LX) and
> ease of mind.
> But again, I understand not everyone flies that way or has two instruments -
> therefore please please make the solver use configuable.
>
> Thank you guys.
>
> Cheers,
> Sascha
>
> Von: Evan Ludeman <[email protected]>
> An: [email protected]
> Gesendet: 17:52 Montag, 21.November 2011
> Betreff: Re: [Xcsoar-user] About MC and tasks
>
> 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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