Search the Community
Showing results for tags 'yaw'.
Found 2 results
It took me years to accept/understand why a Prop Aircaft, single or multi (provided not counter-rotating), should start banking/yawing to the right (on a clockwise rotating prop as seen from the cockpit) when the throttle was retarded/idled... I could understand the Torque, P-factor, Slipstream and even Gyroscopic effect contributing to a left bank/left yaw when power is applied , i.e.: during climb/go around, etc... (something we have debated here several times regarding FLIGHT), but I just couldn't understand why there should be a bank to the right when the throttle was retarded, say, during descent. The only exception, of course, is when the aircraft are built with canted engines, or different incidences in the wings, or incidence in the vertical stabilizer to account for cruise compensation, but what if the aircraft has none of these compensations built in? What if the trims are set to their neutral position and controls centered? Why? MSFS previous versions (including the best add-ons) never modeled this, and I, not being a prop aircraft pilot, could only try to observe and/or ask my fellow engine-rated pilots, who looked at me as ... well as you sometimes think of me here at the forum :-) Well, guess what?, ELITE models this effect, X-Plane 9 and now 10 models it too, and I have argued with Austin about it, but, BUT!!!! MS FLIGHT in it's NEW/redesigned flight dynamics model, also models this effect. Pick the Maule, clear skies for zero winds / turbulence, go up to say, 6000', then stabilize the aicraft, full prop RPM, and retard the throttle... Observe the AH and the magnetic compass or HSI and see it starting to bank and yaw right.... Well, of course there is a mathematical/mechanical justification for this to happen, but I will leave it for another thread :-)
After 6 months of working very well, my PMDG B744 has suddenly decided to add 10-20 degrees of yaw whenever the autopilot is flying. It does not happen when the plane is being flown semi-manually by MCP input, nor does it happen when the plane is being flown hands-on manually. Dark & Cold, deleting fsx.cfg, deleting fsuipc4.ini, etc etc do not solve the problem. It is not yoke or pedal related. I am at my witts end, so any lifeline would be appreciated, even though I haven't tried everything. The Cockpit photo is attached. Note the ND photo below :) Thanks in advance,