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cowl hinges

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mmul6471(at)bigpond.net.a
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Posted: Fri Mar 30, 2007 6:00 pm Post subject: cowl hinges

I have been  checking on my cowl preparations and installation

instructions for my RV9A. It has an O320E3D engine installed in it.  The

finish kit has  one aluminium hinge 6ft long  for joining the two cowl

halves together, fairly easy to identify. However, the Vans contents lists 

says

there is also 9 ft of 1/8 piano hinge. Exactly what dimension does the 1/8

refer to?  Is it supposed to be the width of the hinge, the thickness of the

hinge, or the diameter of the pins?(1/8 does not fit any of these

measurements).

 I received not one nine foot length, but a six foot length and a three foot

length. I also received thee other three foot lengths of piano hinge  which

are of a lighter gauge, (two are 1/16 inch thick, the third piece slightly

thicker) but are not as wide as the six foot and three foot larger ones.

Does anyone know where each bit resides?



I emailed Vans with this question, but after 5 days have received no reply,

perhaps they are busy getting ready for sun'n'fun.

Thanks,

Mick Muller,

Builder 90701

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rveighta(at)earthlink.net
Guest

Posted: Sat Mar 31, 2007 5:11 am Post subject: cowl hinges

Rick, I built an 8A, but I'm pretty sure the cowl attaches the same way as for a 9A. You have two sizes of piano hinge in your finish kit; the widest (when opened) one attaches around the circumference of the cowl halves at the firewall. This hinge also uses a heavy duty stainless steel pin. The smaller hinge attaches horizontally and uses a carbon steel pin, which in my case was already installed in the hinge. In my case, the wider hinges had regualr carbon steel pins installed and I had to remove these and install the seperately supplied stainless pins. 



Of course, when I say the wider hinge installs around the circumference of the cowl, I don't mean all in one piece, but in segments, per the drawing. Don't know what the "1/8" references.



Walt Shipley  Flying RV-8A, RV-8 Finishing



DO NOT ARCHIVE

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rv9jim(at)juno.com
Guest

Posted: Sat Mar 31, 2007 10:52 am Post subject: cowl hinges

Mike,

        The hinges are determined by the pin diameter.  I had some

similar problems when I put my cowling together. The lower hinges (down

both sides and the two along the bottom) all use "full size 1/8" pins". 

The upper cowling uses a smaller diameter pin instead of the full size

pin .  The reason for this is you have to use a smaller dia. pin to go

around the curvature of the cowling.  The actual dia. of the top cowling

pin is .089" and the lower cowing pin is .117" (1/8").  On the upper

pins, I put a 90 deg.bend of about 1-1/2" at the end that you will have

to hold on to when placing and removing them.  I also floxed the hinges

in addition to riveting to keep things neat from shaking about.  I did

this to the lower hinges in addition to the upper ones. I think I have

pix of them on my web site if you want to look.  

www.websites.expercraft.com/jimn 



Jim

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