On Nov 22, 2011, at 3:08 PM, Max Kellermann wrote: > > If you don't want XCSoar to assume you'll ever be thermalling, don't > set a positive MacCready value. (Have I repeated this statement often > enough in this email?)
Loud and clear, thank you! I restate: MacCready theory assumes that height is gained by thermaling, and that's what XCSoar implements. It seems that users find the need to play "what if", and they manipulate MC to do so (and for other wrong reasons, as you point out). So there's a need to let them do that, is there not? I mention a couple of things in my previous message. When I'm thermaling and there is an average lift value, does XCSoar still assume MC as the lift strength? When I'm on final glide at some speed, how do I figure out whether I can glide to a target in current conditions at this or another speed? That's where people change MC, and if you tell them not to (and you're right), what's the alternative?
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