Bill points out with liters, why I prefer bar for pressures, especially in the automotive context. Turbo boost, oil pressure, etc....bar is very nice.
kg/cm2 is ok.....but kPa is just nonsense for those kinds of measurements. Fine though for tire pressures, although bar worked just fine as well.
The kg/cm2 is really lilogram-force per sqiare centimetre. It is definitely a no-no, a member of the metre-kilogramforce-second system. It was used by some engineers, but it had the serious disadvantage that the kilogram-force varies with the location. English-speaking engineers had the same problem with using the pound-force. The aeronautical engineers invented the slug as their unit of mass, 1 slug = 32,2 pounds-mass. The physicists preserved the pound as their unit of mass and had the poundal as their unit of force;
1 poundal = 1 pound-force/32.2
--
Joseph B. Reid
17 Glebe Road West
Toronto M5P 1C8 Telephone 416-486-6071
