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Would you like sauce with those?

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sky_ranger161

Joined: 07 Jun 2006
Posts: 91

Posted: Sun Jul 09, 2006 11:48 am Post subject: Would you like sauce with those?

OK, here's one for ya...

   

  I'm in the research phase of building the wing spars for my XL. While looking through the milspecs for solid riveting, I came across this:

   

  "3.5 Corrosion prevention. When the rivet material is dissimilar to the material being riveted (reference MIL-STD-171), the rivet hole, countersink, and rivet shall be coated with zinc chromate primer in accordance with TT-P-1757 prior to installation. The rivet shall be installed while the primer is in the wet condition."

   

  Since the solid rivet material is NOT dissimilar to the material being riveted, common sense tells me that I don't need to wet-dip the rivets for the spars. Well, my common sense has gotten me into trouble before, so my question is this...

   

  Did anyone who scratch-built their wing spars wet-dip their solid rivets, and would I be  wasting my time and money by doing so? Does Zenith dip theirs for the spars that are included with the kits? 

   

  I'm priming the rest of the entire internal structure with the NAPA rattle-can primer, so on the outside, that would appear to be enough. But... they ARE the wing spars for cryin' out loud, so what do you think - dip, or no dip?

   

  Thanks in advance for any insight.

   

  Debo Cox

  Nags Head, NC

  XL/Corvair

  WOW (working on wings)

   

  do not archive



  		Talk is cheap. Use Yahoo! Messenger to make PC-to-Phone calls.  Great rates starting at 1¢/min.

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larry(at)macsmachine.com
Guest

Posted: Sun Jul 09, 2006 1:21 pm Post subject: Would you like sauce with those?

Debo,

I don't know who's quoting mililtary standards, but Mil-Std-171 isn't 

even being used by the military.  Everything is performance standard and

technically, the requirement would be a waste of your time.  Worse, if 

you decided to paint your aircraft with any paint that doesn't like Zinc 

Chromate,

you'd have a mess to contend with if the rivets were part of the 

surfaces you need to put a finish to.  If the materials are so different 

that they would

work against each other, it might be necessary to consider the effects 

of corrosion, but there aren't any materials specified in the Zenith 

plans that

would do this to you.  No dip.........



Larry McFarland - 601HDS at www.macsmachine.com



Debo Cox wrote:



 	  Quote: 	
		   OK, here's one for ya...

  

 I'm in the research phase of building the wing spars for my XL. While 

 looking through the milspecs for solid riveting, I came across this:

  

 *"3.5 Corrosion prevention.* When the rivet material is dissimilar to 

 the material being riveted (reference MIL-STD-171), the rivet hole, 

 countersink, and rivet shall be coated with zinc chromate primer in 

 accordance with TT-P-1757 prior to installation. The rivet shall be 

 installed while the primer is in the wet condition."

  

 Since the solid rivet material is NOT dissimilar to the material being 

 riveted, common sense tells me that I don't need to wet-dip the rivets 

 for the spars. Well, my common sense has gotten me into trouble 

 before, so my question is this...

  

 Did anyone who scratch-built their wing spars wet-dip their solid 

 rivets, and would I be wasting my time and money by doing so? Does 

 Zenith dip theirs for the spars that are included with the kits?

  

 I'm priming the rest of the entire internal structure with the NAPA 

 rattle-can primer, so on the outside, that would appear to be enough. 

 But... they ARE the wing spars for cryin' out loud, so what do you 

 think - dip, or no dip?

  

 Thanks in advance for any insight.

  

 Debo Cox

 Nags Head, NC

 XL/Corvair

 WOW (working on wings)

  

 do not archive



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sky_ranger161

Joined: 07 Jun 2006
Posts: 91

Posted: Sun Jul 09, 2006 2:43 pm Post subject: Would you like sauce with those?

Cool. Thanks for clearing that up Larry. No dip it is then. FYI, I got the milspec info off the Zenith website - part of the "Chris Heinz Design College" section. I figured I knew the answer, but that's one of those things you just need to be sure about.

   

  Thanks again.

   

  Debo Cox

  XL/corvair

   

  do not archive

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randy(at)shadycreekoutlaw
Guest

Posted: Sun Jul 09, 2006 2:43 pm Post subject: Would you like sauce with those?

Let's hope they are no dip... I just finished mine  up today and none of them were dipped in anything...

  

 Randy

 XL Wings - Plans Only

 Do Not Archive

 http://www.n344rb.com

  

 [quote]   ---

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