On Fri, 13 Dec 2002 10:34:00 -0500, David Megginson <[EMAIL PROTECTED]> wrote in message <[EMAIL PROTECTED]>:
> Jon Berndt writes: > > > > 1. Put the X axis origin at the published weight-and-balance > > > reference datum. > > > > 1) Respect the manufacturer's structural coordinates, if known. If > > not, place the X axis origin at the published weight and balance > > reference datum. If not known, place the X axis origin at the tip > > of the aircraft nose or propeller hub - whichever is farther > > forward (not including probes or antennas). > > The C310 provides an interesting case here, since the later versions > have a longer nose -- that's why the firewall might make more sense as > a default X origin (or the leading edge of the wings at the root). ..the tradition (at least for single prop planes) I believe is put the origin at the firewall _plus_ an offset, X pointing aft, so that "new longer" powerplants remain "positive". -- ..med vennlig hilsen = with Kind Regards from Arnt... ;-) ...with a number of polar bear hunters in his ancestry... Scenarios always come in sets of three: best case, worst case, and just in case. _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
