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jtball
 Post subject: Instrument coaming
PostPosted: Tue Apr 18, 2017 6:47 am 
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Location: Australia
I'm looking for a instrument fibre glass coaming or mould, that sits on top of the instrument panel on the T18. Cessna typical style. any ideas?


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fytrplt
 Post subject: Re: Instrument coaming
PostPosted: Tue Apr 18, 2017 8:02 am 
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Fiberglass melts and droops. Make it out of sheet metal.

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bfinney
 Post subject: Re: Instrument coaming
PostPosted: Tue Apr 18, 2017 8:10 am 
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I used either .010" or .016" aluminum roof flashing, it followed the contour of panel with out any forming required. I finished the edge with split plastic wire conduit and painted it flat black.

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Bruce Finney
N18JF T-18C #262
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Lou
 Post subject: Re: Instrument coaming
PostPosted: Tue Apr 18, 2017 10:24 am 
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what they said.
you can also cover with 1/4 foam sheet and wrap with leather, etc.

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http://www.dixiefriedfabrication.com/


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Ryan Allen
 Post subject: Re: Instrument coaming
PostPosted: Tue Apr 18, 2017 5:41 pm 
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did you attach the flashing to the panel? if so, how did you attach it?


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James Grahn
 Post subject: Re: Instrument coaming
PostPosted: Tue Apr 18, 2017 11:17 pm 
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Mine is leather covered aluminum. It has several angles riveted toward the instrument panel. I just push it forward to the windscreen and push the angles over the back side of the panel. It sits there all day. Even up side down.
Cubes


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bfinney
 Post subject: Re: Instrument coaming
PostPosted: Wed Apr 19, 2017 9:48 am 
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Mine just sits on top of the panel and the sides are a friction fit with the side wall, plus I have a cutout for the compass, never had a problem of it moving.

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Bruce Finney
N18JF T-18C #262
Auburn, WA USA


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Doug S
 Post subject: Re: Instrument coaming
PostPosted: Wed Apr 19, 2017 10:57 am 
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After replacing 2 windscreens, I would recommend NOT covering with vinyl, naugahyde, etc. It off-gasses over time & crazes the acrylic -


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ljkrume
 Post subject: Re: Instrument coaming
PostPosted: Wed Apr 19, 2017 1:15 pm 
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Try fluting the forward edge of the glare shield and use it to secure the bottom of the windscreen behind the skin with a chaffing strip in-between. This takes care of two things at once. It should be a bit flexible as the instrument panel will bounce using vibration isolators. It was easy to add holes covered with screen as a sort of window 'defroster.' Cabin heat and that from inside the firewall will typically find its way upward. It also helps circulation for the radio and instruments.

Les


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jrevens
 Post subject: Re: Instrument coaming
PostPosted: Wed Apr 19, 2017 8:48 pm 
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Doug S wrote:
After replacing 2 windscreens, I would recommend NOT covering with vinyl, naugahyde, etc. It off-gasses over time & crazes the acrylic -


I think it might depend on what kind of vinyl you use, Doug. I've had black Naugahyde on my aluminum glare-shield for almost 27 years that looks the same as it always has, and the windshield is original & looks good too. I do apply some vinyl UV protectant every couple of years or so, and my airplane is hangared when it sleeps. 8)

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