Brief Description: Fitting the Horizontal Stabilizer to the Fuselage
The Horizontal Stabilizer must be perpendicular to the longitudinal centerline of the fuselage. After prepositioning the the inboard edges of the skins parallel to the longerons, I had to verifiy the stabilizer was square to the fuselage by measuring from the outboard end of the stabilizer to the corner of the firewall on both sides. Once I got this measurement exactly the same on both sides by slightly adjusting the stabilizer on the fuselage frame, I clamped it in three places and then had to build some shims to make the angle of attack of the horizontal stabilizer exactly 0 degree incidence angle. In diagram 1 you see the location of the F-798 shim. In the 2nd diagram is a picture of the shim I needed fabricate out of AB4-1.25 x 1 1/2 rough stock. I cut these shims on the bandsaw, deburred and primed (diagram 3). You can see on the right shim I didn't need the full 5/32 angle to make it fit properly.
