Tom,

Is there any indicated speed that you don't need rudder? When I fly at 160 KIAS, I need no rudder. When I fly slower I need right rudder. When I fly faster, I need left rudder. Does your plane behave like this? If not something is wrong with either the rigging or the engine angle.

At what IAS would you like your plane to fly straight? At the current time, what IAS does it fly straight at?

Lorn

> From: Tom McNerney <dudewanarace@yahoo.com>
> Date: April 7, 2011 2:53:11 PM EDT
>
> I have a 360 with an angle valve motor. XP-400SRE  250 hours on this engine now.  I would like to eliminate the amount of rudder required to keep the plane square. (ball in the cage)  I have good reason to suspect the engine has been installed with too much yaw.
>  
> I have the engine level to the airframe in pitch.  The manual calls for 1.5 degrees to the right in regards to yaw. (if I remember correctly)  I assume this was built in to the engine mount.
>  
> In order for me to get the engine level at 0, and straight in yaw, it would take about a half inch of washers on lower right rubber engine mount, and one quarter inch of washers on the upper right mount.
>  
> Is this normal?
>  
> Tom
> www.N54SG.com

--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,790 hrs, N31161, Y47, SE Michigan