Robert Deters wrote: > Lets not forget that english units do work well when one stops using > pound-mass and uses slugs for mass (1 slug = 32.2 lb-mass).
True, if one actually uses slugs. In practice, one doesn't. What's the unit for empty weight? Fuel amounts? Payload? All pounds. Find me a reference that gives air density in slugs per cubic foot, or pressure in pounds per square foot. If you don't use the consistent units consistently, having them isn't much help. If you pick slugs for mass, you should never see pounds. If it's to be feet for length, inches shouldn't exist, etc... In a lot of ways, this is a rerun of my threading argument from a few days ago. You can't patch consistency (threadsafety) onto a unit (software) system; it needs to have been designed in from the start. That being said, I'm neutral on the idea of exporting SI units to the property tree. For most cases, it probably doesn't matter. There are some situations, though, where the panel needs to display a number (using digits, as opposed to a needle) in some unit (EGT comes to mind -- fahrenheit and kelvin) where the conversion is not simply a scaling factor. Doing the math in the panel XML is cumbersome and error prone as opposed to just reading out "egt-degf" from the properties. Andy -- Andrew J. Ross NextBus Information Systems Senior Software Engineer Emeryville, CA [EMAIL PROTECTED] http://www.nextbus.com "Men go crazy in conflagrations. They only get better one by one." - Sting (misquoted) _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
