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Sheet Metal Arrival condition

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brothapig(at)HOTMAIL.COM
Guest

Posted: Sun Jan 07, 2007 3:00 pm Post subject: Sheet Metal Arrival condition

I don't intend this email to be a supplier debate, thus I will leave out where I got my sheet metal from.  My question is, what is the generally accepted condition of aircraft metal that should arrive at your door from an aircraft supplier?  I received a sheet of 4' x 12' x .025" 6061, and there are numerous scratches, about 1/4" long on it.  I realize that in handling that will happen on smaller pieces, but they didn't need to cut this piece.  They are deep enough to get your fingernail in.  Normally I would just polish them out, but I will be making my spars out of them.  I will be asking my supplier about this, but today is Sunday, and I was just wondering if anyone had something to say about this.  

  

 Ryan Vechinski

  [quote][b]

larry(at)macsmachine.com
Guest

Posted: Sun Jan 07, 2007 3:22 pm Post subject: Sheet Metal Arrival condition

Ryan,

When I received my .016 material, several sheets were delivered with 

heel marks across mid and end sections.  Air Parts Kansas packed and 

sent these and there were no heel marks in the cardboard coverings 

either side.  I should have required they exchange the sheets, but 

received a discount in protest.  One heel mark showed up on my 

stabilizer which was replaced.  I'd recommend you return the material 

for full refund and start over with another supplier.



Larry McFarland - 601HDS at www.macsmachine.com

do not archive

Ryan Vechinski wrote:

 	  Quote: 	
		   I don't intend this email to be a supplier debate, thus I will leave 

 out where I got my sheet metal from.  My question is, what is the 

 generally accepted condition of aircraft metal that should arrive at 

 your door from an aircraft supplier?  I received a sheet of 4' x 12' x 

 .025" 6061, and there are numerous scratches, about 1/4" long on it.  

 I realize that in handling that will happen on smaller pieces, but 

 they didn't need to cut this piece.  They are deep enough to get your 

 fingernail in.  Normally I would just polish them out, but I will be 

 making my spars out of them.  I will be asking my supplier about this, 

 but today is Sunday, and I was just wondering if anyone had something 

 to say about this. 

  

 Ryan Vechinski

admin(at)arachnidrobotics
Guest

Posted: Sun Jan 07, 2007 3:27 pm Post subject: Sheet Metal Arrival condition

We order hundreds of sheets a week from multiple suppliers around here, and we still see about 10% of them in the condition that you describe.  Some of the damage happens in transit, some on the flattening line, and some at the mill.      You can try to grit your teeth and get used to it, or order the material with vinyl on both sides (about 7 cents per square foot additional cost, but well worth it).



Ryan Vechinski <brothapig(at)HOTMAIL.COM> wrote:[quote]    P { margin:0px; padding:0px } body { FONT-SIZE: 10pt; FONT-FAMILY:Tahoma }  I don't intend this email to be a supplier debate, thus I will leave out where I got my sheet metal from.  My question is, what is the generally accepted condition of aircraft metal that should arrive at your door from an aircraft supplier?  [quote][b]

naumuk(at)alltel.net
Guest

Posted: Sun Jan 07, 2007 3:48 pm Post subject: Sheet Metal Arrival condition

Ryan-    

     1/4" scratches are nothing- I've had  sheets of .025 come in with heel marks such as described by Larry. I was able to  work around them for the parts I needed, so I kept the sheets. I suppose by  rights I should have returned them, but that would have meant another week of no  progress.

     Your choice....

 Bill Naumuk

HDS Fuselage

Townville, Pa

 [quote]   ---

brothapig(at)HOTMAIL.COM
Guest

Posted: Sun Jan 07, 2007 5:26 pm Post subject: Sheet Metal Arrival condition

I understand that things happen, and I'll let my supplier know about the situation, but right now I think I'm just going to keep the sheets.  It's too much trouble to send it back, and, like you said, another week of no progress.  

  

 I'm just worried about my spar.  Will I need to polish out ALL evidence of the scratches, or will smoothing them out do?  (until I can no longer feel them with my fingernail?)

  

  

 Thanks for everyone's experiences and advice...very much appreciated.

  

 Ryan Vechinski



 [quote]  From: naumuk(at)alltel.net

To: zenith-list(at)matronics.com

Subject: Re: Zenith-List: Sheet Metal Arrival condition

Date: Sun, 7 Jan 2007 18:47:54 -0500



   .ExternalClass P {padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;} .ExternalClass {font-size:10pt;font-family:Tahoma;}   Ryan-    

     1/4" scratches are nothing- I've had sheets of .025 come in with heel marks such as described by Larry. I was able to work around them for the parts I needed, so I kept the sheets. I suppose by rights I should have returned them, but that would have meant another week of no progress.

     Your choice....

 Bill Naumuk

HDS Fuselage

Townville, Pa

 [quote] ---

agustafson(at)chartermi.n
Guest

Posted: Sun Jan 07, 2007 7:01 pm Post subject: Sheet Metal Arrival condition

Don't use it for your spar!!! What's longer, 2 weeks or  eternity???  Worry might keep you alive, but only if you heed  it.

 [quote]   ---

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Mon Jan 08, 2007 6:47 am Post subject: Re: Sheet Metal Arrival condition

[quote="brothapig(at)HOTMAIL.COM"]I don't intend this email to be a supplier debate, thus I will leave out where I got my sheet metal from.  My question is, what is the generally accepted condition of aircraft metal that should arrive at your door from an aircraft supplier?  I received a sheet of 4' x 12' x .025" 6061, and there are numerous scratches, about 1/4" long on it.  I realize that in handling that will happen on smaller pieces, but they didn't need to cut this piece.  They are deep enough to get your fingernail in.  Normally I would just polish them out, but I will be making my spars out of them.  I will be asking my supplier about this, but today is Sunday, and I was just wondering if anyone had something to say about this.  

  

 Ryan Vechinski

   	  Quote: 	
		  [b] 	




If the scratches are that deep, send it back. Tell them you're not accepting sheets with deep scratches in it. Regardless of whether it's an aircraft supplier or not, they oughta know damaged material is not good. You didn't put an order in for damaged materials, you put an order in for usable material.

Ron Lendon

Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI

Posted: Mon Jan 08, 2007 12:53 pm Post subject: Re: Sheet Metal Arrival condition

All good advice so far.  



I am building an XL and my wing spar webs are .040 and the spar caps are .032, as is the center spar web.  Don't know where you might be using the .025 for spar material, unless we are making different airplanes.



Zenith told me long ago the only place the grain really matters is in the wing spars.



I stand corrected, I must have read the print wrong and didn't notice the rear channels were spars also.

_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/

Last edited by Ron Lendon on Mon Jan 08, 2007 6:44 pm; edited 1 time in total

ashontz

Joined: 27 Dec 2006
Posts: 723

Posted: Mon Jan 08, 2007 1:02 pm Post subject: Re: Sheet Metal Arrival condition

 	  Ron Lendon wrote: 	
		  All good advice so far.  



I am building an XL and my wing spar webs are .040 and the spar caps are .032, as is the center spar web.  Don't know where you might be using the .025 for spar material, unless we are making different airplanes.



Zenith told me long ago the only place the grain really matters is in the wing spars. 	




The rear wing spar is .025 as is the spars in the stabilizer and the rudder.

naumuk(at)alltel.net
Guest

Posted: Mon Jan 08, 2007 3:24 pm Post subject: Sheet Metal Arrival condition

.025 SHEET, for skins.

Bill Naumuk

HDS Fuselage

Townville, Pa

---

naumuk(at)alltel.net
Guest

Posted: Mon Jan 08, 2007 3:36 pm Post subject: Sheet Metal Arrival condition

All-

     I misunderstood what the raw  material would be used for. Still, I don't think 1/4" scratches would be any  violation of structural integrity, even for a spar. 

     Of course, that depends on how deep the  scratches are. To be deeper than a couple of thou, you wouldn't have a scratch  but an impact blow.

     My opinion only, I bow out and leave  things to the experts.

 Bill Naumuk

HDS Fuselage

Townville, Pa

 [quote]   ---

brothapig(at)HOTMAIL.COM
Guest

Posted: Tue Jan 09, 2007 8:51 am Post subject: Sheet Metal Arrival condition

I'm sorry, let me clarify what the material will be used for.  I am building a 701, and the .025 is for the spar web.  The spar web then gets capped on the top and bottom with 3/4" x 3/4" x .093 angle.



I tried to polish the scratches out, and I can polish them out with a lot of elbow grease, but I think the list has swayed my opinion.  I'll use this sheet for the ribs and other wing items, and I'll order a new sheet for the spar web.  In the end I'll feel a lot better.  (as others have said)

By the way, my supplier was extememly helpful, and before I could even tell them that I didn't see the need to send them back, they said they will be sending out new sheets with prepayed package for the damaged sheets back to them.  But, I had already cut the sheets, and I'll need more .025 anyway.



Thanks everyone who chimed in on this question.  It's good to bounce questions off the group to see what others think.  I really appreciate it.



Ryan Vechinski

craig(at)craigandjean.com
Guest

Posted: Tue Jan 09, 2007 9:15 am Post subject: Sheet Metal Arrival condition

Because your vendor did the right thing can you tell us who they are?



-- Craig

pacificpainting(at)comcas
Guest

Posted: Tue Jan 09, 2007 12:20 pm Post subject: Sheet Metal Arrival condition

DO YOU MIND TELLING WHO THE SUPPLIER IS? THEY SOUND PRETTY REASONABLE TO 

WORK WITH.

---

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