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Bill & Brendas RV-8 QB
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Date:  1-13-2014
Number of Hours:  4.00
Manual Reference:  Dwg 48
Brief Description:  Bottom Cowl horizontal piano hinge fitting and mis

Removed upper cowl and sannded the horizontal edge again both sides and reinstalled. Its a tight fit and needs a paint gap but I will fit the hinges first and then make the paint gap

With cowl on again, I marked and drilled two additional holes on inside air inlet in the nose. Drilled them to #19 and used a plate nut jig to drill the platenut rivit holes. The flange isnt very big so they had to be orientated 45 degrees. Image 1 shows this as well as the aft hole being drilled out of line.
I did this on both sides.

The AN257 P3 hinge was next. It was supplied in a 6 foot length and so I cut it in half. Be sure to remove the pin first as you will need the extra length. I learned the hard way! Fortunately I have extra for some reason.

I drew a center line down the backside of the bottom hinge, Marked it every 1 inch, center punched, Drilled pilot holes and then finaly #40. I then clamped the bottom hinge half to the bottom cowl and noted that I needed to remove some of the hinge edge so that it would butt up against the top of the vertical hinges and at the same time be just above centerline as per instruction. Pic 3 nis a shot of the aft end and how you let it rise up so that the center pin is slightly above the cut line. This is supposed to ease cowl installation.. The hinge is clamped so that it slowly returns to where the center pin is on the cut line in the front. Just a slight angle.

Used angle drill and match drilled the lower cowl from the inside and clecoed as aI went. Did the 35 holes on each side.

Used propane torch to heat and then bend 90 degrees a bit of a handle on the hinge pins used to attach cowl halves to the fire wall. They will need further work and such but will help for the install and removal ops for now
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inside air intake drilled for #8 screw and platenuts

inside air intake drilled for #8 screw and platenuts

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bottom cowl fitted with the horizontal hinge

bottom cowl fitted with the horizontal hinge

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Aft end of horizontal hinge showing the amt of rise above  the center

Aft end of horizontal hinge showing the amt of rise above the center

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