THe Nexstar right thrust/left offset is designed to counter engine torque & spiral slipstream effets at ~1/3 - 1/2 throttle (training speed). At higher throttle settings it causes a right turn.


I have modified numerous Nexstars.

For a quickie fix I just slip a popsicle stick behind the right edge of the engine mount.

For permanent jobs, I invariably remove all right thrust & left offset. A balsa wedge is used to square up the firewall, & I glue it into place with CA. I then laminate either a 3/16" or 1/4" plywood layer on top of the shimmed firewall (depends what material I have at the time). Finally, I pin the new firewall from the sides (through the fuse) with #4 screws.

If I have removed the dihedral, &/or if I have sunk the wings into the cabin, I also remove some down thrust by wedging, before I laminate the top layer onto the firewall.