On Fri, 2002-06-07 at 23:45, Norman Vine wrote:
> FWIW > crosstrack error on a 'spherical earth' was computed in 'some' > navigation instruments long before 'digital' computers were used > in these devices. > < trig values for an angle can be determined from an 'analog' device > and the rest is just 'gearing' ( think circular sliderule ) > > > Don't know if any of these were ever used in aircraft though > I think the answer is 'probably' because big old jets (707s, VC10s, DC8s .. and, come to think of it, maybe even 747s prior to the -400) have fearsomely complicated mechanical HSIs, and this seems like a likely thing to do. Anyway, I'll stop speculating, and get back to implementing code ... we can resume the speculation once I have a CDI / heading output to drive something with :-) James _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
