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Powder Coatings - after the fact

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John H Murphy

Joined: 03 Jan 2007
Posts: 78
Location: Henderson, NV

Posted: Sun Dec 23, 2007 6:07 pm Post subject: Powder Coatings - after the fact

My FS II is in need of paint on the boom area (where the boom support is located) and several other areas. Is there any reason I cannot have someone powder coat these areas? I live in an area with low humidity (Las Vegas, NV) so the reason is not rust, but cosmetics. Is there any gotchas to worry about?

planecrazzzy
Guest

Posted: Sun Dec 23, 2007 6:15 pm Post subject: Re: Powder Coatings - after the fact

You "DO" know that the powder coat process , calls for the paint to

"BAKE" at around 400 degrees.......



Gotta Fly...

Mike & "Jaz" in MN / Epoxy white Frame- FSII

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lcottrell

Joined: 29 May 2006
Posts: 1494
Location: Jordan Valley, Or

Posted: Sun Dec 23, 2007 9:22 pm Post subject: Powder Coatings - after the fact

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John H Murphy

Joined: 03 Jan 2007
Posts: 78
Location: Henderson, NV

Posted: Sun Dec 23, 2007 10:52 pm Post subject: Re: Powder Coatings - after the fact

Nope. Was not aware of that small fact. Sounds like it might not be that helpful to other parts of the aircraft...

The BaronVonEvil

Joined: 23 Jun 2006
Posts: 76
Location: Walla Walla, WA.

Posted: Sun Dec 23, 2007 11:32 pm Post subject: Re: Powder Coatings - after the fact

Hi John



I have a Firestar II  that I recovered the fuselage because the fabric had allot of wear and tear. I opted to powder coat the cage as I wanted a more durable finish to work with.



The powder coating process works best on steel parts. Because of the temperatures involved I would not coat aluminum parts especially tempered or hardened bits. If you decide to powder coat the cage you will need to remove the boom tube.



The only problem I had was that the cage had relaxed a bit causing an out of trim condition in the wings.  I used the English wing u-joints to correct the wing trim problem.



Otherwise I quite happy about the finish of the powder coating and its durability.



Carlos G

AKA

BaronVonEvil

rowedenny(at)windstream.n
Guest

Posted: Mon Dec 24, 2007 2:54 am Post subject: Powder Coatings - after the fact

John,

If you are just now building your airplane, powder coating the fuselage and 

boom tube is a fine idea.

If your airplane is already assembled than it will not be so easy.

My Mk-3  came from the old Kolb with the powder coated option on the boom 

and fuselage and it has held up well.



Denny Rowe, N616DR

gaman(at)att.net
Guest

Posted: Mon Dec 24, 2007 4:46 am Post subject: Powder Coatings - after the fact

About powder coating;

             Did all the metal parts,had some reservations  about the temps on 6063 or 6061 boom,but my guy said that they stay under those damaging temps ..almost 10 years ago.Chips pretty easy but still looks OK 



Denny Rowe <rowedenny(at)windstream.net> wrote:[quote] --> Kolb-List message posted by: "Denny Rowe" 



John,

If you are just now building your airplane, powder coating the fuselage and 

boom tube is a fine idea.

If your airplane is already assembled than it will not be so easy.

My Mk-3  came from the old Kolb with the powder coated option on the boom 

and fuselage and it has held up well.



Denny Rowe, [quote][b]

jb92563

Joined: 23 Mar 2007
Posts: 314
Location: Southern California

Posted: Wed Dec 26, 2007 10:38 am Post subject: Re: Powder Coatings - after the fact

I would worry about changing the temper(strength/durability) of aluminum parts.



Ask the shop what the tempering temps of various types of aluminum are and if they have no clue, choose a shop that does understand and care.

_________________
Ray

Kolb UltraStar (Cuyuna UL-202)
Moni MotorGlider
Schreder HP-11 Glider
Grob 109 Motorglider

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Steve Boetto

Joined: 11 Jan 2006
Posts: 365

Posted: Thu Dec 27, 2007 6:42 am Post subject: Powder Coatings - after the fact

In a message dated 12/26/2007 1:39:33 P.M. Eastern Standard Time,  jb92563(at)yahoo.com writes:

  	  Quote: 	
		  

I    would worry about changing the temper(strength/durability) of aluminum    parts.



Ask the shop what the tempering temps of various types of    aluminum are and if they have no clue, choose a shop that does understand and    care.



--------

Ray

	
  

 Years ago when Aluminum Scuba tanks were introduced there were a few cases  of ruptured tanks due to powder coating. So there may be some merit to your  concern.

  	  Quote: 	
		  

    

   Steve

Firefly 007/Floats

do not  archive

	


See AOL's top rated recipes and easy ways to stay in shape for winter.

  [quote][b]

Steve Boetto

Joined: 11 Jan 2006
Posts: 365

Posted: Thu Dec 27, 2007 6:54 am Post subject: Powder Coatings - after the fact

In a message dated 12/26/2007 1:39:33 P.M. Eastern Standard Time,  jb92563(at)yahoo.com writes:

  	  Quote: 	
		  

I    would worry about changing the temper(strength/durability) of aluminum    parts.



Ask the shop what the tempering temps of various types of    aluminum are and if they have no clue, choose a shop that does understand and    care.



--------

Ray

	
  

  

 Years Ago when Aluminum Scuba tanks were introduced there were 

  	  Quote: 	
		  

 	


See AOL's top rated recipes and easy ways to stay in shape for winter.

  [quote][b]

Dennis.Kirby(at)kirtland.
Guest

Posted: Fri Dec 28, 2007 9:32 am Post subject: Powder Coatings - after the fact

"The BaronVonEvil" wrote: <<... Because of the temperatures involved I

would not coat aluminum parts especially tempered or hardened bits.  If

you decide to powder coat the cage you will need to remove the boom

tube. Carlos G >>



This topic came up on the Kolb List several years ago when I asked the

same question: "Can I powder coat the aluminum boom tube?"  



It was determined (and I verified, to be sure) that the 6061 Aluminum

will not suffer any degradation of its strength properties by being

heated to 400 degrees F.  I consulted with a strength & structures

engineer.  We looked at several temp vs. strength graphs for 6061

aluminum.  Bottom line is: you're OK to powedercoat the boom tube.



I did mine in 2000, along with the cage and all steel parts in the Kit.

Works just fine.



Dennis Kirby

Mark-III, 912ul, Powerfin-72, N93DK

Cedar Crest, NM

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