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"Stretched" aluminum

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Jaybannist(at)cs.com
Guest

Posted: Mon Oct 09, 2006 4:19 pm Post subject: "Stretched" aluminum

Hey folks,  I just completed the fitting of the XL canopy inside flashing.  I did the "stretching" on the top flange called for in the photo guide to make the panel curve to fit.  It fits, but it looks like "hammered hell" !!.  Has anyone else had this result and, if so, what did you do to improve the appearance?  I haven't drilled for the top angle, so I am thinking about just adding a cut-to-fit piece of .025 to the top of the inside flashing.  Any suggestions?

 

 Jay in Dallas, working on XL canopy

 Do not Archive  [quote][b]

larry(at)macsmachine.com
Guest

Posted: Mon Oct 09, 2006 4:49 pm Post subject: "Stretched" aluminum

Jay,

When you hammer a flashing that curves, you place the hammer on the 

inside of the sheet and the side that will be seen should be on a smooth 

piece of steel.

Then all the marks will be on the inside and the surface showing will 

mirror the surface of the steel block.  See links of pieces.  Template 

ink curve is a gage on the table.



http://www.macsmachine.com/images/canopy/full/flashinghammered.gif

http://www.macsmachine.com/images/canopy/full/canopycurvegap.gif



This also applies to the piece you form to join the fuselage skin to the 

wing.



http://www.macsmachine.com/images/canopy/full/cnpyrailcover.gif

I'd do it over again. Doesn't take that much time to get it right.  

Otherwise, you might just beat on it from the correct side and see if 

you can get rid of the marks.

Worst case, sand prime and fill the imperfections, but it would take 

less time to redo it than make excuses for why you added a "fudge cover".

Respectfully,



Larry McFarland - 601HDS at www.macsmachine.com



Jaybannist(at)cs.com wrote:



 	  Quote: 	
		   Hey folks,  I just completed the fitting of the XL canopy inside 

 flashing.  I did the "stretching" on the top flange called for in the 

 photo guide to make the panel curve to fit.  It fits, but it looks 

 like "hammered hell" !!.  Has anyone else had this result and, if so, 

 what did you do to improve the appearance?  I haven't drilled for the 

 top angle, so I am thinking about just adding a cut-to-fit piece of 

 .025 to the top of the inside flashing.  Any suggestions?



 Jay in Dallas, working on XL canopy

jeffrey_davidson(at)earth
Guest

Posted: Mon Oct 09, 2006 5:07 pm Post subject: "Stretched" aluminum

Jay,  

            I had the same effect on the inside canopy frame trim.  I just painted it while I had the pieces separated and moved on!  A shrinker/stretcher tool might have left a better looking result despite the marks it leaves.   

            Jeff Davidson  

   

Hey folks, I just completed the fitting of the XL canopy inside flashing.  I did the "stretching" on the top flange called for in the photo guide to make the panel curve to fit.  It fits, but it looks like "hammered hell" !!.  Has anyone else had this result and, if so, what did you do to improve the appearance?  I haven't drilled for the top angle, so I am thinking about just adding a cut-to-fit piece of .025 to the top of the inside flashing.  Any suggestions?

 

 Jay in Dallas, working on XL canopy

 Do not Archive   [quote] [b]

Jaybannist(at)cs.com
Guest

Posted: Mon Oct 09, 2006 5:13 pm Post subject: "Stretched" aluminum

Larry, Thanks for the advise.  I'll probably start over and do it right this time.  

 

 I am surprised about your comment regarding "the piece to connect the fuselage skin to the wing."  My kit has a rubber fairing strip.  Has something changed?  Or is this just a better way to do it?

 

 Jay in Dallas

 Do not archive  [quote][b]

nfivesl(at)yahoo.com
Guest

Posted: Tue Oct 10, 2006 4:36 am Post subject: "Stretched" aluminum

Jay - I used a shrinker and it came out pretty good.  Larry M. always has great ideas and I'd use his idea of hammering on the back side if you don't have access to a shrinker.  If you are building an XL you won't have the fuselage flashing.  



The shrinker leaves little "teeth" marks but they easily sand out.  



Keep up the good work,

Scott Laughlin

610XL/Corvair

See my engine running here:

http://www.cooknwithgas.com/Videos.html



---

larry(at)macsmachine.com
Guest

Posted: Tue Oct 10, 2006 5:38 am Post subject: "Stretched" aluminum

Jay,

I forgot you are doing an XL and my HDS has this kind of structural to 

connect to a permanent center section.



Larry

do not archive



Jaybannist(at)cs.com wrote:



 	  Quote: 	
		   Larry, Thanks for the advise.  I'll probably start over and do it 

 right this time. 



 I am surprised about your comment regarding "the piece to connect the 

 fuselage skin to the wing."  My kit has a rubber fairing strip.  Has 

 something changed?  Or is this just a better way to do it?



 Jay in Dallas

 Do not archive



*

*

rge177(at)yahoo.com
Guest

Posted: Tue Oct 10, 2006 2:26 pm Post subject: "Stretched" aluminum

I just finished my canopy and had the same problem.  I

think I got a little carried away with the hammering

on the first piece of flashing.  The second piece I

placed the bottom of the flange on an anvil, and

hammered (easily) the top side with a ball pin hammer,

then turned it over and with the flat side of the

hammer worked the indents out.  It worked ok, but like

Jay said, still kind of looks like "hammered hell."  I

painted mine flat black, and it looks a little better,

kind of hides some of the marks.  I chose not to make

another, because I don't think it would look much

better than the first.  I'll just live with it.



Ron

Ft Worth, TX



Jaybannist(at)cs.com wrote:



 	  Quote: 	
		   Hey folks,  I just completed the fitting of the XL

canopy inside 
	


 	  Quote: 	
		   flashing.  I did the "stretching" on the top flange

called for in the 
	


 	  Quote: 	
		   photo guide to make the panel curve to fit.  It

fits, but it looks 
	


 	  Quote: 	
		   like "hammered hell" !!.  


	


__________________________________________________

agustafson(at)chartermi.n
Guest

Posted: Tue Oct 10, 2006 5:13 pm Post subject: "Stretched" aluminum

Hammer?  Did you ever make a ring out of a nickel by tapping on it w/ a tea 

spoon? Takes patience but you end up w/ a finely finished  ring. Same w/ 

stretching aluminum! do not archive



Aaron

---

Jaybannist(at)cs.com
Guest

Posted: Tue Oct 10, 2006 5:32 pm Post subject: "Stretched" aluminum

Ron, Larry McFarland wisely suggested I start over, hammering only the bottom side of the top flange, and I was going to do that.  Then I realized #1 that I had already drilled the inside flashings to the canopy frame.  I don't know how I could manage to hit those holes with a new flashing; and #2 I studied the back side of the top flange and it was nearly as ugly as the top!  I really had to pound those flanges to get the curve I needed. I have now coated the mangled flanges with JBWeld and sanded them down to an acceptible appearance.  There really must be a better way!

 

 Jay in Dallas

 Do not archive  [quote][b]

davgray(at)sbcglobal.net
Guest

Posted: Thu Oct 12, 2006 3:00 am Post subject: "Stretched" aluminum

The local hardware sells Felt weather striping that  is gray in color about 5/8 " wide that was perfect to run along the top flange  of the inside cowl flashings.  I no longer see the stretch  marks.

  

 [quote]   ---

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