KitLog pro

Powered By Kitlog Pro v2.0

Marlins Web Site
' style=
Date:  3-28-2009
Number of Hours:  2.00
Manual Reference:  Section 8; Dwg 27A
Brief Description:  Fitting the Horizontal Stabilizer (continued)

Next I measured and drilled four bolt holes through the forward stabilizer spar. These bolts are what mount the forward part of the stabilizer to the fuselage. They go through the spar, the shims I fabricated, and then through two more reinforced angles on the fuselage longerons. There is only three inches of clearance to drill the holes and there's less room to maneuver to get the nuts and washers on after the holes are drilled (even though these lightening holes look pretty big, there's not much room to get a wrench on the nuts on the under-side.) In order to get straight, vertical holes, I had to use my angle drill and drill slowly through all this hardened metal. After the first bolt was installed I had to recheck the 0 angle incidence of the stabilizer and also check to make sure the stabilizer was still square with the fuselage. Even with three clamps holding it down, the stabilizer moved 1/32" out of square when I drilled the first hole, so I re-adjusted, reclamped and drilled the remaining 3 bolts. You can see the bolts going through the fabricated shims under the reinforcing spar angle (pictures 2 & 3). Everything turned out perfectly square and exactly 0 degree incidence angle. The good news about all this meticulus messing around is this airplane should fly very straight and level once it's done. All I have to do next is drill the holes for the rear stabilizer mounts and I'll be ready to install the control stick push-pull rods to the elevator horns.
' style=

Front Stabilizer Spar Mounting Bolt Diagrams

Front Stabilizer Spar Mounting Bolt Diagrams

' style=

Right side bolts going through reinforcing angle and shim

Right side bolts going through reinforcing angle and shim

' style=

Left bolt going through reinforcing angle and shim

Left bolt going through reinforcing angle and shim

' style=










Copyright © 2001-2024 Matronics. All Rights Reserved.