03-09-2013: 4.5 hrs
A block of wood is used to drill the elevator push rod to horn holes
Holes are drilled. I put a file in and they look pretty straight
The holes are reamed to final size (3/16" dia), bolt fits pretty well
Another view of the drilled elevator horns
The drilling was all done on bench, it is time to mount the horizontal stab to fuselage. A level is used to check the levelness. Looking good here
A 3/16" thick aluminum bar is used to raise the rear spar per plan
Distance between firewall and HStab tip is about 155-1/2" on the right side
Showing the location of firewall the distance was measured
155-1/2" on the left side as well. HStab is squared
Horizontal from spar is marked for drilling. The location is in line the rivet line on the longeron
Bolts are temporarily put in
The inboard bolt hole on the right side is slightly foward, the edge margin is about 1.67, instead of the desired edge margin of 2D. Since the load at this joint is primary tension, the edge margin is not as critical as in shear joint. Also, the Hstab is constantly under downward force which doesn't put much load on the joint anyway. I don't worry about this less than desired edge margin, but I definitely check it periodically for any crack.
The bolts on the left side all have proper edge margin, looking good here
Holes on the rear spar of Hstab are drilled, all look good
The other side of the rear spar
Elevators are mounted
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