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04-18-2010, 01:11 PM
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Join Date: Mar 2008
Location: Hardin, KY
Posts: 135
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Inside of cowl
I am reading the Van's manual regarding finishing the cowl. The manual discusses finishing the outside of the cowl, but not the inside.
It seems to me that doing something to the inside of the cowl would help prevent problems with oil and heat issues.
I am considering sanding the inside of the cowl and filling with epoxy, as shown in the manual for the outside of the cowl. I also purchased a sheet of reflecting material to protect the inside of the cowl from heat.
Am I correct to do this or am I wasting my time?
__________________
Carl Nank
Western KY Lakes Region
N39CN
RV7-A, Superior IO-360, 180HP, Hartzell, Dynon D100, D10 & HS34. Garmin 430W & 327 xp. PS Engineering 8000B audio w/3 light marker beacon. Approach Avionics Pro Hub.
Cut Instrument panel myself. I installed avionics myself. Panel is powdercoated a beautiful dark blue crackle.
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04-18-2010, 01:19 PM
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Join Date: Jan 2005
Location: Louisville, Ga
Posts: 7,840
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Yep...
...it's been discussed many times, Carl. Do a search and you'll get a bunch of info. Inside the cowl is a good place to paint excess epoxy you mixed and it will prevent oil-soaking later. There is a silver tape type of heat shield that guys use to prevent exhaust scorching where it's close,
Best,
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Pierre Smith
RV-10, 510 TT
RV6A (Sojourner) 180 HP, Catto 3 Bl (502Hrs), gone...and already missed
Air Tractor AT 502B PT 6-15 Sold
Air Tractor 402 PT-6-20 Sold
EAA Flight Advisor/CFI/Tech Counselor
Louisville, Ga
It's never skill or craftsmanship that completes airplanes, it's the will to do so,
Patrick Kenny, EAA 275132
Dues gladly paid!
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04-18-2010, 02:15 PM
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Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,389
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What Pierre said
Definitely worth sealing up the inside of the cowl before any chance of oil getting onto it 9and into pores). I used the 2-inch wide Al tape over about 1/3 of the inside of the cowl to protect from heat. I did this after flying a couple hours and seeing some of the browning of the inside. Every few hours during my Phase I, I would pull the cowl and look for heat issues and add tape as necessary.
greg
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Greg Arehart
RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
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04-18-2010, 02:20 PM
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Join Date: Jul 2008
Location: Morgan Hill, CA
Posts: 77
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The rvator a while ago had an article on refinishing the cowl inside- mix epoxy with acetone, squeegee small sections at a time- the acetone dries quickly. This is to seal the pinholes, which connect to the core, from the oil to come once you start flying. Afterwards line the inside of the cowl with the aluminum foil back with adhesive you can order from Van's. The cowls are highly optimized, lightweight but durable, so keeping the radiant heat down is good- a cool cowl is a happy cowl.
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04-19-2010, 08:53 PM
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Join Date: Mar 2008
Location: Hardin, KY
Posts: 135
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Why did I not think of using excess epoxy during my build......
Thanks guys! Starting inside of cowl tomorrow.
__________________
Carl Nank
Western KY Lakes Region
N39CN
RV7-A, Superior IO-360, 180HP, Hartzell, Dynon D100, D10 & HS34. Garmin 430W & 327 xp. PS Engineering 8000B audio w/3 light marker beacon. Approach Avionics Pro Hub.
Cut Instrument panel myself. I installed avionics myself. Panel is powdercoated a beautiful dark blue crackle.
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