On Fri, 2004-02-13 at 10:23, Russell Suter wrote: > Jon Berndt wrote: > > >So, > >instead of defining some arbitrary frame, _we_use_an_industry_standard_, > >which is the structural frame that the manufacturer defines, when available. > >It is always (in my experience) X positive aft, Y positive right, with the > >origin being seemingly arbitrary. > > > I wouldn't go so far as to say this is an industry standard. FG is the > first sim I've > seen that uses this coordinate system. The one I've seen the most is X > positive forward, > Y positive right and Z positive down. Someone once told me this was > named the > Boeing system. On the sim I'm working on now, it's positive Y forward, > positive X > to the right and positive Z up. I'll admit that most of the sims I've > worked on are > relatively old in FORTRAN and C. >
There really are no industry standards here. Body axis, earth local, and earth fixed are commonly used in simulation. A system like our structural system is commonly used by manufacturing, ground ops, and flight ops folks. But even then, the origins vary from airplane to airplane. > Don't get me wrong, I'm not saying this is a bad system, I'm just not > sure I agree it > is an industry standard... -- Tony Peden <[EMAIL PROTECTED]> _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
