Jon wrote:Christian wrote: > If we'd use SI units everywhere we wouldn't have that prolem...
Well, yes we would have.
Jon's right, you can't win. Using SI pervasively sounds like a great idea, but it doesn't win you much. Even outside the USA, you don't see engines rated in watts or newtons very often. Fuel will still be sold in pounds and gallons, even if the configuration files use kg or litres. The bug is with the real world, not the software.
Every car has it's engine reated in kW and horsepower around here (in Germany) - but that's then only time that I see a non SI unit around here in normal life.
Petrol/Gas is sold by the liter and everybody talks about how many liters you need per 100 kilometers when they want to know how fuel efficient the car is.
I don't know about any other countries though... (but I'm pretty sure the french do it the same way as well as Austria, Switzerland, ...)
FWIW, YASim is 100% SI internally. But it still uses "native" units (pounds for fuel, etc...) in its configuration files. Positions are dont in meters, though.
The user interface should definitely be in the units that the user expects (and that are e.g. feet for the altitude in the western world; btw. I was told that the Russians used meters...)
But internally we shold us a consitent standard (where it makes sense).
So when JSBsim wants to use non-SI internally (because it's developers are only familiar with those units) that can be fine.
But the interfaces that "everybody" sees should be consistent - and there are definitely the strengths of SI units.
CU, Christian
PS: About what feet are we talking actually? Every village around here had it's own definition of feet... (and that was a good way to rip of customers for the traveling salesman...)
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