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  #31  
Old 02-10-2010, 09:51 AM
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thomasyost thomasyost is offline
 
Join Date: Sep 2009
Location: Keaau, HI
Posts: 41
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I'm glad that I'm not the only only person who has had this happen. My "oil-canning" is limited to only the first forward section and I expect it to be eliminated when it is connected to the fuselage.

If I had to do it again, I would use three saw horses during the initial cone assembly (while upside down). I have a suspicion that there may have been some undesirable flexing occurring towards the first bulkhead.
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  #32  
Old 02-10-2010, 10:43 AM
JBPILOT JBPILOT is offline
 
Join Date: Nov 2007
Location: Jesup, Iowa
Posts: 1,657
Default Hey Tom

Sorry to say, I think you will still have the problem once you connect the fuse to the tail cone. You likely will have to shim it on the right first section. Seems to be a problem with the largest frame in that area. If you just get with it, you can shim it out in a couple hours of careful work. I used the trimmed off pieces of the wing ribs for shims.

John Bender

Last edited by JBPILOT : 02-11-2010 at 06:08 AM.
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  #33  
Old 06-23-2010, 11:38 AM
mnmisage mnmisage is offline
 
Join Date: Feb 2010
Location: Austin, Texas
Posts: 37
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I finished the tail cone this weekend and I also have the ripples and oil canning. While I am waiting on the wing kit, I was wondering if I could get some suggestions on whether I should just let it be for now or if I should shim it up. Also, if some of you have used shims, could you give me some suggestions on how this is done.
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  #34  
Old 06-23-2010, 11:58 AM
Andy J Andy J is offline
 
Join Date: Mar 2007
Location: Minden, NV
Posts: 145
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The oil canning in my tailcone went away when I joined it to the fuselage. I would let it be for now.

I am undecided on shimming later to relieve the minor ripple or indentation by the bulkheads - not sure it is that important to me and it could bring back the oil canning, but either way I don't think I would have gotten the shimming correct without the tailcone joined to the fuselage.
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Last edited by Andy J : 06-23-2010 at 12:07 PM.
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  #35  
Old 06-24-2010, 12:52 PM
ARPENN ARPENN is offline
 
Join Date: Feb 2009
Location: West Ossipee, NH
Posts: 141
Default Little ripples in the side skin

Sounds like a song once heard.

This is from the man himself. Van told me at Sun n' Fun that you can eliminate that condition by adding some of that extra angle stock left over from the kit and applying it inside the Tail Cone with some two-sided tape or glue to reinforce those rippled areas. The fix is not permanent and can be removed if someone objects. There will only be a slight weight and balance change depending on how many pounds of aluminum you use. Jusy kidding.
It should be only a few ounces.

Art Pennanen
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  #36  
Old 03-06-2011, 05:52 PM
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denmit denmit is offline
 
Join Date: Jun 2007
Location: Canberra Australia
Posts: 18
Default Oil Canning

G'day fellow RV-12 builders and particularly flyers, as you may have the answer to my question. I have oil canning in the F-1280 Left and Right Side Skins exactly as described by Joe (sys1jal) in this thread.

It has been more than 6 months since the last post on this subject and in the meantime many more 12s have been completed and flown. So what have you who have gone before us experienced with this issue?

Does joining the tailcone and forward fuse diminish or remove the problem?
Has anyone tried shimming the sides of the F-1208 Frame and, if so, did it work?
Does the gluing of foam or angle inside the affected area work?
Is it just accepted as part of the weight trade-off?

I'd sure appreciate any assistance and advice. It's a real bugger (as we say in Australia) when you go to some lengths to get a good fit and finish on the project but the design or kit execution lets it down.

Dennis Mitchell
Canberra Australia
Empennage finished
Wings under way
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  #37  
Old 03-06-2011, 06:49 PM
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DonFromTX DonFromTX is offline
 
Join Date: Oct 2010
Location: La Feria Texas
Posts: 3,822
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I am glad you brought this thread to the front. I just completed my tailcone, and was alarmed to find oilcanning on both sides, both at the same front to rear location, after I was so careful with the assembly. On mine the oilcan is a slight depression on each side, that with finger pressure on the inside reverts to straight sides. I think I could glue a short piece of aluminum to the inside and eliminate the depression AND the oilcanning, that might be noisy in flight. In fact that may well be a great idea regardless. Would that ProSeal not work well on that?
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  #38  
Old 03-06-2011, 07:50 PM
Threetracker Threetracker is offline
 
Join Date: Aug 2008
Location: Jefferson, Oregon
Posts: 86
Default You can shim till the cows come home...but you may want to fly?

We flew our 12 first on July 18, 2010 and today we went over 250 hours. There has been different amounts of rippling on the right side skin since day one and it will probably always be there. It actually is better in hot weather. The RV-12 operates beautifully...and I just can't see any ripples in flight.
Maybe that's because I can't see past my 'grin'?

I have never seen an RV-12 without a ripple; never expect to see one.

Jay Sluiter
N124CS
Albany, OR (S12)
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  #39  
Old 03-06-2011, 10:01 PM
Ted Farmin Ted Farmin is offline
 
Join Date: Mar 2005
Location: Sandpoint, Idaho
Posts: 104
Default Little ripples in side skin

As I clecoed the side skin before riveting I noticed the ripples so I shimmed the skin as I had to do a lot of shimming while building the RV-4. Looks good.

Ted Farmin
CFI RV-4 2007 550 hrs
Sonerai 1977
RV-12 -emp, wings done
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  #40  
Old 03-07-2011, 06:14 PM
GDS GDS is offline
 
Join Date: Mar 2009
Location: Big Bear lake, CA
Posts: 124
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Following up on my post of March 2009, the RV12 is in the paint shop. I shimmed the worst offender and it looks somewhat better, but you can see a disturbance where the shim is placed. The oil cans I did not shim are still there, but the paint made them look shiny and pretty. I'm sticking with my original thoughts, paint it, fly it and forget about it.

This is my first photo post, sorry in advance if it doesn't work too well.
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