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  #1  
Old 03-26-2017, 11:25 PM
dave4754 dave4754 is offline
 
Join Date: Oct 2009
Location: Edson, Alberta, Canada
Posts: 400
Default Cowling disappointment

Hello:

Well after careful studying, reading, and measuring and measuring some more i have come up with a rather disappointing gap in between my forwad skin and the cowling on my RV 7. Looks like i sanded a little more than I needed, Also the piano hinge seen through gap looks unsightly.

Any ideas on how to narrow the gap now? The manual is practically useless on this stuff it seems to me.

I have seen Bertrands excellent posts and others and yes I have already searched the posts before, looking for any help or suggestions. Thanks.





Dave
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Last edited by dave4754 : 03-26-2017 at 11:55 PM. Reason: new picture location
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  #2  
Old 03-27-2017, 06:01 AM
bobnoffs bobnoffs is offline
 
Join Date: Jul 2012
Location: n. wi
Posts: 424
Default

at least it is easy to fit parts together and see how much gap you have!
anyway, i did it too in places. easy but a little time to fix. scarf the edge 3 widths and put something [masking tape, thin alum. strip] against one side of the cowl. make a thick mix of flox/epoxy and add it on. sometimes you have to get a little creative to keep mix from moving until it sets. this works good for up to 1/8''. when it sets remove excess on inside and outside of cowling and reassemble cowling and mark your cut line again.
sounds tedious and it is a little but end result will be unnoticeable.
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  #3  
Old 03-27-2017, 07:42 AM
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DanH DanH is offline
 
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http://www.vansairforce.com/communit...70&postcount=1
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  #4  
Old 03-27-2017, 07:45 AM
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MikeyDale MikeyDale is offline
 
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I scarfed mine twice! Just didn't learn my lesson the first time!
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RV 7 FLYING SINCE 4/2015!
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  #5  
Old 03-27-2017, 08:15 AM
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airguy airguy is offline
 
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Location: Garden City, Tx
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I'm about to tackle this same problem on my cowl, prior to paint. All it takes is time...
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  #6  
Old 03-27-2017, 08:57 AM
dave4754 dave4754 is offline
 
Join Date: Oct 2009
Location: Edson, Alberta, Canada
Posts: 400
Default Sounds encouraging

Thanks for the thread, I searched for everything cowling and this did not come up.

My gap fill will easily be 1/8 of an inch.

I wonder with the vibration and all will it hold up over time over vibrate and chunk off?

The plans and manual are very disappointing regarding this step.

Thanks for your responses, make me feel better and yes I will take the time to fix as the thread suggests.

Dave
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Dave Cobb
=VAF=2017 Donation - and a bit extra for great work!
Empennage RV 7 - Tipper
Wings complere

Fuse coming along, Canopy looking good!
AME reviewed and repaired O-320-Lyc installed
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  #7  
Old 03-27-2017, 10:39 AM
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mike newall mike newall is offline
 
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Location: Yorkshire, England
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It won't come off if you follow Dan's method.

I have repaired all sorts of items with West and flox/glass. Quite remarkable what it will stick to.

It pays to make up some decent sanding blocks as well. Get some 1" MDF, if you can find it with laminate on, even better. Go to Home Despot and get 3 or 4" sanding belts. I would suggest 1 coarse - I mean 30 grit coarse and one at say 80 grit. Cut the belt and use contact adhesive to attach to the MDF, trim as necessary. The block should be as long as the belt is when cut across.

What you now have is a great 'sanding plane'. Use in smooth forward strokes, like a plane and voila, you get a good cut, doesn't clog the belt and great control. Move from the 30 to the 80 and then finish as needed.

If it does clog, get a rubber belt cleaner - like a big pencil eraser - cleans the abrasive really well.

Once you have them, they become invaluable. I made curved ones up for the canopy as well.
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  #8  
Old 03-27-2017, 10:46 AM
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LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
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That's what I did. Saved the pieces I cut off... put them back on...started again.

For a little assurance that you're not alone in your struggles, I give you the Cowling Chonicles

Episode 1

Episode 2 (talks about putting fiberglass back)

Episode 3

Episode 4

Anyway, keep your chin up. All is not lost. And when you're done, your plane will look fabulous.
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St. Paul, MN.
Blog: Letters From Flyover Country
RV-12iS fuselage
Builder log

Last edited by LettersFromFlyoverCountry : 03-27-2017 at 10:51 AM.
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  #9  
Old 03-27-2017, 01:08 PM
dave4754 dave4754 is offline
 
Join Date: Oct 2009
Location: Edson, Alberta, Canada
Posts: 400
Default Thank you Bob for flyover......

I thourohly enjoyed "the chronicles" and they were very well done!

The encouragement to move beyond helps as well. There are days the for sale sign goes over the part where the prop goes!

Then I pick up my tools and start again.

Dave
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Dave Cobb
=VAF=2017 Donation - and a bit extra for great work!
Empennage RV 7 - Tipper
Wings complere

Fuse coming along, Canopy looking good!
AME reviewed and repaired O-320-Lyc installed
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  #10  
Old 03-27-2017, 03:49 PM
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LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
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Quote:
Originally Posted by dave4754 View Post
I thourohly enjoyed "the chronicles" and they were very well done!

The encouragement to move beyond helps as well. There are days the for sale sign goes over the part where the prop goes!

Then I pick up my tools and start again.

Dave
Yep. We've all been there. Pressing on from our little disappointments, figuring them out, fixing them, elevating our confidence in the process is what you're gonna miss once you're flying that thing.

Come find me whenever you get stuck. Whatever you did, I've done worse and I ended up with a **** of a fine airplane.
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Blog: Letters From Flyover Country
RV-12iS fuselage
Builder log
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