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Greg McFarlane
Joined: 12 Apr 2012
Posts: 57
Location: Albany Western Australia
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 Posted: Tue Jan 22, 2013 4:21 am Post subject: Tapered Top Cowl Pins |
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Here is a quick easy way to allow the 120 top pins to be used to retain that nice fit and stop the cowl ballooning. Place a piece of hardwood about 10 inches long in a vice. Using a CUTTING disc on a 4inch grinder make a straight shallow cut the length of the wood then mark a line across the wood 7inches from one end. Cut the pins to length, hold one end in an electric drill and have an assistant operate the drill at about 1000rpm, hold the rotating pin with one hand on the wood groove and with the other hand a 4 inch grinder with a GRINDING disc. GENTLY and EVENLY apply the grinder to the first 6inches of the pin using the mark on the wood as a guide. Check the diameter as you go, when about 100 discard the assistant and using the drill yourself sand the pin smooth. Sand the end of the pin per plans to give a nice lead in.The pin needs only to be tapered for about 6inches and that allows it to enter and go around the curve in the hinge nicely and keeps everything nice and snug. Cheers from Western Australia
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Tue Jan 22, 2013 5:36 am Post subject: Tapered Top Cowl Pins |
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I like it! I'm going to use that on my next cowl, and maybe
even replace my pins with ones like that on my -10.
Hopefully I can do a good job on that pin though, as I can
tell it's going to take a steady hand and some focus.
Tim
On 1/22/2013 6:21 AM, Greg McFarlane wrote:
| Quote: |
<grbcmcfarlane(at)gmail.com>
Here is a quick easy way to allow the 120 top pins to be used to
retain that nice fit and stop the cowl ballooning. Place a piece of
hardwood about 10 inches long in a vice. Using a CUTTING disc on a
4inch grinder make a straight shallow cut the length of the wood then
mark a line across the wood 7inches from one end. Cut the pins to
length, hold one end in an electric drill and have an assistant
operate the drill at about 1000rpm, hold the rotating pin with one
hand on the wood groove and with the other hand a 4 inch grinder with
a GRINDING disc. GENTLY and EVENLY apply the grinder to the first
6inches of the pin using the mark on the wood as a guide. Check the
diameter as you go, when about 100 discard the assistant and using
the drill yourself sand the pin smooth. Sand the end of the pin per
plans to give a nice lead in.The pin needs only to be tapered for
about 6inches and that allows it to enter and go around the curve in
the hinge nicely and keeps everything nice and s! nug. Cheers from
Western Australia
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=392870#392870
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toaster73(at)embarqmail.c
Guest
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| Posted: Tue Jan 22, 2013 6:22 pm Post subject: Tapered Top Cowl Pins |
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Great, I just might give that a go.
-Chris
N919AR
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