On Nov 21, 2011, at 5:48 PM, Max Kellermann wrote: > On 2011/11/21 23:40, Evan Ludeman <tangoei...@gmail.com> wrote: >> Sorry John, no sale. We need height relative to glide slope at a pilot >> selectable Mc setting for final glide. If that's being eliminated in >> preference wind dependent height of climb required, that's a poor >> choice. > > What XCSoar shows is not the height relative to the glide slope. > > What XCSoar shows is how much you need to climb to reach your goal. > > The height relative to the glide slope is a theoretical number that is > of no practical use for a glider, even if it might be appealing to > calculate it, and even if it gives you the illusion that it is useful. > > Max >
I disagree, rather strongly. 30 miles out on final glide, 500' below glide slope, I am not looking for a thermal to center and circle in, I am looking for enroute lift to get up to a comfortable final glide. The height below glide slope is preferable to height required to climb (in circling). I'm rather astonished to find out about how XCS is doing these calculations, I didn't know this but in retrospect it does explain (perhaps) some of the discrepancies I have noted between XCS and my C-302/303. As previously noted, I always go with the 302/303 as primary reference for final glide. This whole conversation completely astonishes me. I never suspected that anyone doubted the utility of height relative to glide slope for final glide. It appears to me that there are some who are out to put "all the brains in the box". That's an interesting intellectual and software engineering challenge to be sure, but it's not what I am interested in. I am solely interested in aids to my situational awareness. I find height relative to glide slope to be such an aid. Height required to climb given an assumed thermal strength... not so much. -Evan ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-novd2d _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
