Pierce Nichols wrote: > > On Thu, 2003-10-23 at 00:15, David Masten wrote: > > > I had figured that to yaw left decrease left engine thrust and increase > > right engine thrust simultaneously. Since opposite motors generate > > torque in the same direction this should mean no (little) torque change. > > Neither the strategy you propose nor John's strategy eliminate > cross-axis coupling. Both strategies still produces coupling to the roll > axis when maneuvering in both pitch and yaw at the same time.
Hmmm... suppose we make alternate "pitch" and "yaw" inputs (i.e., assuming that the roll axis is initially vertical, we can pulse up the left front/left rear engines to yaw to the right, then pulse the left rear/right rear pair pitch forward). Neither of these two impulses will apply a roll torque - why should their combination? (That would involve pulsing right rear and left front with unit impulse, and pulsing the left rear with 2x unit impulse. Since right rear and left front are "roll direction A" and left rear is "roll direction B", we still have zero net roll input, no? Another way of looking at this is to assume that the left rear is providing a "yaw right/pitch forward" impulse, while the LF/RR pair provides the counter-torque to its roll effect (in a manner that's roll-pitch neutral). -dw _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
