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Instrument Panel - Powercoat Thickness?

 
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Matt Dralle
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Joined: 08 Nov 2005
Posts: 26320
Location: Livermore CA USA
PostPosted: Sun Dec 14, 2008 10:08 am    Post subject: Instrument Panel - Powercoat Thickness? Reply with quote
Dear Listers,

I laid out the RV-8 panel in a CAD program and had experimentalair.com cut a clear Lexan mockup for fitting. I highly recommend using a Lexan mockup first as its a lot cheaper and it really helps to be able to see through the panel to locate brackets, etc. Also, Nick Burns over at ExperimpntalAir has be *super* to work with on this project. I've been emailing him DXF versions of the panel and he made a number of suggestions that I incorporated into the CAD drawing. I sent him the final CAD version Wednesday and he cut the Lexan panel on a FloJet and I received it Friday. It's a work of art!

So here's my question. On the hole cutouts, I used a micrometer to measure each instrument, then used these exact measurements in the CAD drawing. I added .005" to both X and Y to allow for easier sliding in and out of the instrument which has turned out to be exactly the right amount. BUT, there's no powercoating on the panel yet. I'm planning on a simi-flat black coating. What is the thickness of the powercoating? How much should I increase the cutout size to account for the coating and still have the nice, tight, fit that I have now?

Here's a link to my Builder's Log for anyone that is interested in checking out more on the project:

http://www.mykitlog.com/users/category.php?user=dralle&project=619&category=0

Thanks for the feedback,

Matt Dralle
RV-8 #82880 N998RV (res)

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n801bh(at)netzero.com
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PostPosted: Sun Dec 14, 2008 12:36 pm    Post subject: Instrument Panel - Powercoat Thickness? Reply with quote
Depending on the product used to powercoat it varies on thickness. .005 total on a hole is just .0025 per side. Powercoating, even if done as light as possible will be thicker then that. I am sure there is a powercoating guy on the list but my wild guess is minimum clearance to add to a instrument hole should be .012 or .006 per side, even that might be a tight fit.
do not archive
Ben Haas
N801BH
www.haaspowerair.com

-- Matt Dralle <dralle(at)matronics.com> wrote:

Dear Listers,

I laid out the RV-8 panel in a CAD program and had experimentalair.com cut a clear Lexan mockup for fitting. I highly recommend using a Lexan mockup first as its a lot cheaper and it really helps to be able to see through the panel to locate brackets, etc. Also, Nick Burns over at ExperimpntalAir has be *super* to work with on this project. I've been emailing him DXF versions of the panel and he made a number of suggestions that I incorporated into the CAD drawing.  I sent him the final CAD version Wednesday and he cut the Lexan panel on a FloJet and I received it Friday. It's a work of art!

So here's my question. On the hole cutouts, I used a micrometer to measure each instrument, then used these exact measurements in the CAD drawing. I added .005" to both X and Y to allow for easier sliding in and out of the instrument which has turned out to be exactly the right amount. BUT, there's no powercoating on the panel yet. I'm planning on a simi-flat black coating. What is the thickness of the powercoating? How much should I increase the cutout size to account for the coating and still have the nice, tight, fit that I have now?

Here's a link to my Builder's Log for anyone that is interested in checking out more on the project:

  http://www.mykitlog.com/users/category.php?user=dralle&project=619&category=0

Thanks for the feedback,

Matt Dralle
RV-8 #82880 N998RV (res)



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dauscj(at)nb.net
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PostPosted: Mon Dec 15, 2008 2:14 pm    Post subject: Instrument Panel - Powercoat Thickness? Reply with quote
Matt,
Powdercoat guy here, recommended thickness is .0015" to .003" per side. We
usually get .002" to .003" when we spray. Just ask the powdercoater to run
his finger or something that will "brush off" the powder around the inside
of the holes before he cures the powder. Doing this will brush off the
powder and will take most if not all of the thickness away.
Chuck

RV6A FWF

--

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