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Firewall

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lo2u

Joined: 11 Apr 2006
Posts: 46
Location: Upstate New York

Posted: Tue Apr 25, 2006 8:19 am Post subject: Firewall

I am doing a scratch build and have been cutting aluminum. After viewing the Firewall construction photo section on the Zenith CD, reading the materials lists,and the aluminum cutting layouts, I still can't figure out what material is used for the Firewall. I notice the main "spar" is aluminum and see it is attached directly to the main Firewall.. but is the Firewall made of aluminum or some form of steel? If steel how is it protected from corrosion due to contact with aluminum?



Sorry to ask such a basic question but I am trying to plan ahead..



Thanks,



Ron Culver

CH-701 ..scratch from plans ..cutting aluminum at present..

JAPhillipsGA(at)aol.com
Guest

Posted: Tue Apr 25, 2006 8:41 am Post subject: Firewall

Ron, I think it is galvanized steel. I will put a magnet on mine this p.m. to 

confirm. Bill

p.mulwitz(at)worldnet.att
Guest

Posted: Tue Apr 25, 2006 9:29 am Post subject: Firewall

The firewall included in my kit is made of galvanized steel.



Paul

XL wings (still . . .)



At 09:17 AM 4/25/2006, you wrote:

 	  Quote: 	
		  am doing a scratch build and have been cutting aluminum. After 

viewing the Firewall construction photo section on the Zenith CD, 

reading the materials lists,and the aluminum cutting layouts, I 

still can't figure out what material is used for the Firewall. I 

notice the main "spar" is aluminum and see it is attached directly 

to the main Firewall.. but is the Firewall made of aluminum or some 

form of steel? If steel how is it protected from corrosion due to 

contact with aluminum?


	


---------------------------------------------

Paul Mulwitz

32013 NE Dial Road

Camas, WA 98607

---------------------------------------------

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Tue Apr 25, 2006 11:44 am Post subject: Re: Firewall

Yep, it's galvanized steel. I put some Zinc Chromate between them.



 	  lo2u wrote: 	
		  I am doing a scratch build and have been cutting aluminum. After viewing the Firewall construction photo section on the Zenith CD, reading the materials lists,and the aluminum cutting layouts, I still can't figure out what material is used for the Firewall. I notice the main "spar" is aluminum and see it is attached directly to the main Firewall.. but is the Firewall made of aluminum or some form of steel? If steel how is it protected from corrosion due to contact with aluminum?



Sorry to ask such a basic question but I am trying to plan ahead..



Thanks,



Ron Culver

CH-701 ..scratch from plans ..cutting aluminum at present..

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

larry(at)macsmachine.com
Guest

Posted: Tue Apr 25, 2006 11:55 am Post subject: Firewall

Ron,

  If you're scratch building, I'd recommend you look at .015 stainless 

as it's more durable and easier to mount structure to

than the typical galvanized metal recommended in the plans.



Larry McFarland - 601HDS at www.macsmachine.com

do not archive



Ron Culver wrote:



 	  Quote: 	
		  



I am doing a scratch build and have been cutting aluminum. After viewing the Firewall construction photo section on the Zenith CD, reading the materials lists,and the aluminum cutting layouts, I still can't figure out what material is used for the Firewall. I notice the main "spar" is aluminum and see it is attached directly to the main Firewall.. but is the Firewall made of aluminum or some form of steel? If steel how is it protected from corrosion due to contact with aluminum?



Sorry to ask such a basic question but I am trying to plan ahead..



Thanks,



Ron Culver

CH-701 ..scratch from plans ..cutting aluminum at present..

frank.hinde(at)hp.com
Guest

Posted: Tue Apr 25, 2006 12:13 pm Post subject: Firewall

I would agree...but I think stainless is harder to work, drill

etc...than galvnised.



Reason I would use SS is that its what Van's uses and everyone knows how

superior a Van's aircraft is....



But seriously, the one problem I found with the galvanised is that if

you use the cheesy overflow bottle provided you will eventually get

radiator fluid on the firewall....almost ubelievably the glycol strips

the galvanising straight off the firewall..then of course it rusts!



There is a much better overflow bottle by the way that does not have a

hole that glycol can leak out of, usually available at your local

autparts store.



Frank

601HDS 

RV7a..almost finished. 



--

Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Tue Apr 25, 2006 1:22 pm Post subject: Re: Firewall

Thank God the Corvair engine I'm installing doesn't need an overflow bottle.  

 	  frank.hinde(at)hp.com wrote: 	
		  

But seriously, the one problem I found with the galvanised is that if

you use the cheesy overflow bottle provided you will eventually get

radiator fluid on the firewall

-- 	


DO NOT ARCHIVE

_________________
W.R. "Gig" Giacona
601XL Under Construction
See my progress at www.peoamerica.net/N601WR

lo2u

Joined: 11 Apr 2006
Posts: 46
Location: Upstate New York

Posted: Tue Apr 25, 2006 1:44 pm Post subject: Firewall

Thanks guys.Very helpful as usual. Where would be the best source of 

Stainless or of Galvanized and is 0.015 standard for either or both..

Ron

---

dredmoody(at)cox.net
Guest

Posted: Tue Apr 25, 2006 1:44 pm Post subject: Firewall

Nor the Jabiru 3300 I'm going to install,



Ed



Do Not Archive



---- Gig Giacona <wr.giacona(at)cox.net> wrote: 

 	  Quote: 	
		   

 

 Thank God the Corvair engine I'm installing doesn't need an overflow bottle.  

 

 

 

 frank.hinde(at)hp.com wrote:

 > 

 > But seriously, the one problem I found with the galvanised is that if

 > you use the cheesy overflow bottle provided you will eventually get

 > radiator fluid on the firewall

 > --

 

 

 

 DO NOT ARCHIVE

 

 --------

 W.R. Gig Giacona

 601XL Under Construction

 See my progress at www.peoamerica.net/N601WR

 

 

 

 

 Read this topic online here:

 

 http://forums.matronics.com/viewtopic.php?p=30666#30666

mgraves(at)usmo.com
Guest

Posted: Tue Apr 25, 2006 2:36 pm Post subject: Firewall

The stainless will be lighter..



But



If you decide to go with galvanized sheet.   29 guage thickness is what you 

should ask for.   I got mine from a local coragated metal supply house. 

$4.00 for a 40in x 40in square...   They take huge coils of sheet and form 

them into corrigated roofing..... and snipped me off an end..... Metal 

roofing supply house in the yellow pages...    A heating and cooling duct 

work shop may also have some of the thinner 29 guage sheet,   Although its 

likely thinner than they use for standard duct work.



BTW if you find a local Metal roofing supply house that makes their 

corrigated roofing in the shop.   They will also most likely have a HUGE 

sheet brake with the proper radius for bending the .040 longerons as 

well.   They charged $5.00 to bend my 701 longerons the same day I picked 

up my firewall sheet.



Monty

At 05:43 PM 4/25/2006 -0400, you wrote:

 	  Quote: 	
		  



Thanks guys.Very helpful as usual. Where would be the best source of

Stainless or of Galvanized and is 0.015 standard for either or both..

Ron

Jari Kaija

Joined: 23 Feb 2006
Posts: 69

Posted: Tue Apr 25, 2006 11:32 pm Post subject: Firewall

 	  Quote: 	
		   I would agree...but I think stainless is harder to work, drill

 etc...than galvnised.


	


I made my firewall from stainless steel. It's a little "harder" to drill, 

but not too much. And when drilling, it's quite important, that you 

don't burn your drill bit.

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