Brodhead Pietenpol Association

Original Posted By: "glich7(at)juno.com"
I am ready to start cutting some metal fittings and need the sheet metal for my firewall as well. I have seen some different alloys suggested for cutting the fittings from other than the one suggested in the plan. What is the best option for the fittings? What would be the proper guage of stainless for the firewall? -Scott Schreiber________________________________________________________________________________

Original Posted By: Rcaprd(at)aol.com
Subject: Re: Pietenpol-List: Sheet metal suggestions for fittings and firewallIn a message dated 12/3/2006 8:36:42 PM Central Standard Time, got22b(at)subarubrat.com writes:What is the best option for the fittings?Scott, I'm not sure I understand your question. I will say that the fittings should be built AFTER you have the wood portion built, and then do the fittingsto fit the wood. If you build the fittings first, you will likely be doing some of them over. However, I had this conversions stored in the bits & bytes of my computer: (I think Greg Cardinal originally posted it)Gage to decimal for TUBING 11 ga .120 12 ga N/A 13 ga .095 14 ga .083 16 ga .065 17 ga .058 18 ga .049 20 ga .035 22 ga .028 Gage to decimal for SHEET 11 ga .125 12 ga .100 13 ga .090 14 ga .080 16 ga .063 18 ga .050 20 ga .040 22 ga .032 or .025 Chuck G.NX770CG________________________________________________________________________________

Original Posted By: walt evans
If, God forbid the worst happens and there is a fire, won't the galvanizing burn off and make a poisonous gas? I remember WW saying something about how bad the fumes were from his teaching of welding days.dennis Engelkenjohn ----- Original Message -----

Original Posted By: Gary Gower

Original Posted By: "Catdesigns"
Subject: Re: Pietenpol-List: Sheet metal suggestions for fittings and firewallIn a message dated 12/5/2006 6:09:59 PM Central Standard Time, wingding(at)usmo.com writes:If, God forbid the worst happens and there is a fire, won't the galvanizing burn off and make a poisonous gas? I remember WW saying something about how badthe fumes were from his teaching of welding days.dennis EngelkenjohnDennis,Although it is an acceptable material, that's a possibility that I hadn't thought of. Might be the reason that most certified aircraft have Stainless Steel firewalls (.016" - .018"). I've welded and braized on galvanized, and itdefinitely puts off fumes (poisonous) that I felt in my throat. Just another reason I would vote for a Stainless Steel firewall, backed up with FibreFax material.Chuck G.NX770CG________________________________________________________________________________

Original Posted By:

Original Posted By: Rcaprd(at)aol.com
Subject: Re: Pietenpol-List: Sheet metal suggestions for fittings and firewallIn a message dated 12/6/2006 6:04:25 AM Central Standard Time, harvey.rule(at)bell.ca writes:I don=99t see how a hand extinguisher is going to work anyway since as soon as you reliese the extinguishing gas it will just blow back into your face.I have a hand extinguisher in my aircraft and to be quite frank,I think it is just excess baggage.Once stopped and on the ground it may do some good providing the wind isn=99t blowing.I have a small fire extinguisher in my cockpit, next to my left hip. It is there in case I am on fire...forget about trying to put out the burning plane with it.Chuck G.NX770CG________________________________________________________________________________

Original Posted By: Ben Ramler
Subject: Re: Pietenpol-List: Sheet metal suggestions for fittings and firewall"chkval...In a message dated 12/6/2006 6:05:34 AM Central Standard Time, redsglass(at)hotmail.com writes:What is the drawback of a check valve on an aviation engine. I understand that it is one other piece in the fuel system that could cause a power loss but it would be a great safeguard in a crash. I suppose the tank would rupture if the crash was severe enough and a fuelcell could help that. I think I heard someone say planes are not built to crash. What do you guys think?Forget about the check valve in the fuel line of an aircraft. The vast majority of engine failures are fuel related...no sense adding another piece thatcould cause the big fan to stop turning..."If it ain't there, it can't break".Build your plane light, with quality construction and maintenance. In other words - build it Airworthy, not Crashworthy.Chuck G.NX770CG________________________________________________________________________________Date: Wed, 6 Dec 2006 16:04:50 -0800 (PST)