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01-21-2013, 02:53 PM
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Join Date: Mar 2008
Location: Ramona, CA
Posts: 2,370
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What gap should I leave for paint on the cowling?
I'm done with rough fitting my cowling on the -9A. Now I want to sand down the edges for a perfect fit so I can start getting the hinge sections attached.
What sort of a gap between the top/bottom/sides should I leave for paint thickness?
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01-21-2013, 02:55 PM
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Join Date: Feb 2007
Location: Dallas, TX
Posts: 365
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The thickness of a credit card.
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01-21-2013, 03:57 PM
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Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,196
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A hacksaw blade or tongue depressor also work well. When I dropped off my RV-10 to get painted, there were several places that the painter wanted me to widen the gap a little more. I used a tongue depressor wrapped a sandpaper on my doors to get the proper gap.
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01-21-2013, 04:04 PM
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Join Date: Jan 2005
Location: Arkansas
Posts: 1,505
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I did about 1/16 inch on my RV9A and it worked out fine.
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Jim Wright
RV-9A N9JW 90919 SoldArkansas
http://www.jimsairplanes.com
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"It's a brutal struggle for the biscuit."
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01-21-2013, 04:28 PM
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Join Date: Nov 2007
Location: Cary, N.C.
Posts: 1,216
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I used the wife's nail file / emory board. Just be sure to dispose of the evidence.
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Noel
RV-6A N6NF
tip-up
flying
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01-22-2013, 05:36 AM
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Join Date: May 2005
Location: Florida
Posts: 774
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As Reffeler stated, a hacksaw blade is the perfect thickness to allow for paint. Just see-saw it back and forth at the joint till it is an easy fit between the surfaces.
this method also assures a nice straight line between the upper and lower cowls.
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07-20-2013, 12:07 PM
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Join Date: Jul 2009
Location: Petaluma, CA
Posts: 233
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further advise sought
If I use the hacksaw method, should I leave the hinges attached and run the hacksaw blade back and forth towards the face of the hinge below?
Should I do this before or after the hinges have been epoxied and riveted?
__________________
Bill Mason
RV7 SB in construction
Avionics, Wiring, FWF, interior, and paint to go.
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07-20-2013, 12:58 PM
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Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,196
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Quote:
Originally Posted by instructor_bill
If I use the hacksaw method, should I leave the hinges attached and run the hacksaw blade back and forth towards the face of the hinge below?
Should I do this before or after the hinges have been epoxied and riveted?
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Before. Use the hacksaw as a measuring device when you make you initial cuts. You can always put it back in later to re-measure
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07-20-2013, 02:09 PM
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Join Date: Jul 2009
Location: Petaluma, CA
Posts: 233
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okay, before rivet/epoxy
Now, only as a feeler guage or have others used the hacksaw in-situ to get an exact assembled gap?
Are there pros and cons to doing either way?
If I protect the hinge with colored electrical tape, I think I should be able to run the blade in assembled, then there's no chance of over-doing it. Has anybody done it this way?
__________________
Bill Mason
RV7 SB in construction
Avionics, Wiring, FWF, interior, and paint to go.
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07-20-2013, 02:24 PM
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Join Date: Oct 2005
Location: 08A
Posts: 9,500
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Quote:
Originally Posted by bruceh
What sort of a gap between the top/bottom/sides should I leave for paint thickness?
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1/16 or larger, but the exact size doesn't matter. It must be a consistent width to look good.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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