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Bill & Brendas RV-8 QB
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Date:  12-2-2013
Number of Hours:  1.00
Manual Reference:  dwg 48
Brief Description:  Drill upper cowl piano hinge to firewall

I probably spent 2 hours looking at plans and the supplied hinges and reading the short instruction provided before I decided that I understood. I think my major block was that I couldnt firgure out the use of a 1/8 hinge with two different sizes of pin. I then just realized that the pin is supposed to be loosely fit in the top cowh firewall hinge. Once I accepted that I went on.
I do not or can not find dwg 21 so I did the following: Installed a 1/8 hinge half to the underside of firewall flange and evenly spaced end to end. Clamped into place with cleco clamps. I then match drilled the hinge, installing clecos as I went.
Plans say to leave a gap and to refer to dwg 21 which I cant find. Ill look at my plans at home to see if they are there. If not, I have a plan to cut the existing hinge just past center and move the remaining part down leaving a space of abot 3 eyelets. I know how the hinge pin is removed using the oil access door and I need the right side shorter than the left to be able to get both pins out. I will try to finish this upper hinge tomorrow and then fit upper cowl.
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dwg 48 showing placement of top cowl hinge and location of gap. Note the hinge and pin size

dwg 48 showing placement of top cowl hinge and location of gap. Note the hinge and pin size

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Hinge half fitted and match drilled to firewall flange

Hinge half fitted and match drilled to firewall flange

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