"C. Hotchkiss" <[EMAIL PROTECTED]> said: > David, > The only place that I know of that manufactures aircraft (or at least did > routinely) with SI based instrumentation was the old Soviet Union. Some of > their aircraft either sold to customers, or operating outside the SU were > involved in at least two mid air collisions (IIRC, between heavies in India > and off western Africa). This was thought at the time to be due to confusion > over unit conversion, either in the cockpit or by the ATCs involved. Maybe > somebody can recall these instances with better accuracy. Either way, history > condemned us to English units. > > At any rate, might we introduce a configuration line in the set up files that > alerts the program that all following units are SI instead of English? Ditto > access members that are known to report/set data members/parameters in SI > instead of English unit values? This might make dealing with airframes like > some of the older Russian designs a bit easier and less error prone. >
Maybe it would be possible to chain properties together so for example if position/altitude_ft is set then position/altitude_m also gets set. Generally though, instrumentation could be calibrated anyway for meters or mpm even if the inputs are in feet and fpm. But it requires the panel designer to do the conversion backwards to English when they write the xml. Best, Jim _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
