RIGGING - YAW ISSUES

In my experience, this is one of the inevitable things you deal with when your rudders are interconnected with the ailerons.

Under takeoff acceleration, rotation, and heavy climb you will get a little left yaw. That's why the rigging guide has you adjust the nosewheel to steer straight under high power. That way, you're not using a lot of right steering (and therefore also right aileron) as you approach rotation speed.

On the other hand, when you flare and pull power to idle, you get a little right yaw. No problem... the plane lands in a crab all the time.

I'm not a certified mechanic, just a guy who has tweaked his rigging a few times. I'm happy with no yaw in cruise, and the slight induced yaws I described above...? I think that's just the nature of the beast.

Don't adjust your rudder cable tension unless they're wrong, and have been tested with a cable tensionometer. You absolutely CAN damage the rudder bellcrank (maybe catastrophic) or the control mast itself (probably catastrophic) if your cable tension is too high, or experience control surface flutter if they're too loose.

If your rudders need adjusting to eliminate yaw during level flight, you need to adjust the length of the rudder control rods either at the center connection or at the outboard ends (where there are handy access plates for doing so.)

sorry I did not see this sooner. first thing to do is to get rid of the trim tab, that is a illegal modification of a flight control. next thing is to verify the rigging is correct. then go test fly it. but instead of shooting touch and goes, go up and do some simulated landings at altitude and see what the plane is telling you.

Good evening,

Looking for some practical and real world experiences… Yes, I have all the bulletins, manuals and rigging information, and yes, I have an experienced A&P and inspector working with me.Rigging flight controls.  I have a 1946 415C, no rudder pedals.  Airplane flies straight and trimmed when level and cruise speed, slow flight and climb. However, only when landing (low power, descending and yes, zero wind), the airplane yaws to the right almost as it need a touch of left rudder from the approach phase to flare.  I am wondering if I need to adjust the rudder turnbuckle for a little left pressure.  Not sure if I should adjust the left or right rudder, etc.  I also have a small fixed trim tab on the right rudder, about 4 inches long.

The airplane was recently rigged according to the service manual. 

Insights and experiences and  ideas would be very valuable.