> > My question:
> > If I put the aircraft (Cub or 172) into a constant bank and
> > pitch angle turn ("trimmed"), I expect phidot and thetadot to
> > be near zero, and psidot non-zero... Yet, I see thetadot near
> > zero, and phidot and psidot non-zero (as a matter of fact:
> > phidot is almost as "large" as psidot). Surely this can't be
> > right? According to the FlightGear (and MathsWorks / Matlab)
> > documentation, this is not p,q,r but Euler/Gimbal angular
> > rates in rads/sec... not body rates...
>
> Sorry, but I don't have ANY time to respond to this, but keep in mind that
> you are looking at BODY-AXIS rates and accelerations. If you are
> in a turn,
> the pitch and roll are going to show values.
>
> Billp,q,r are body rates. In a *steady* turn, I would expect body rates (p,q,r) to be zero. Phi, theta, psi (Eluer angles) are measured with respect to the local frame. In a steady turn, the euler *rates* would be non-zero. Jon ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
