Wes,
Although I had 34 good years at Lockheed, tool and die maker, tool designer,
numerical control programmer, draftsman, loftsman, and computer geek, I am
not an engineer. Titanium's sensitivity to chlorine is dependant on the
alloy and the environment. Exhaust valves would be sensitive, spring
retainers wouldn't and so on. Fred Larsen is one of my heroes. He once asked
us why we brought all those spare parts and tools to the salt (we
traditionally bring everything in the garage that will fit in the trailer).
All he had was the flatbed trailer with the liner an alternate engine in the
back of the El Camino and the tools to change it. "You guys are supposed to
do all that tune up stuff before you get here", was his comment.
Jim in Palmdale, in the sunshine but cold, well cold for a desert rat
anyway.
----- Original Message -----
From: Wester S Potter <wspotter@jps.net>
To: Jim Dincau <jdincau@qnet.com>
Cc: land-speed list <land-speed@autox.team.net>
Sent: Thursday, February 17, 2000 8:18 AM
Subject: Re: Titanium-Brake clean
> Jim, List,
> You know, I feel a lot like the comment Fred Larsen made when he was
talking
> about the body on his #115 streamliner. He said;
> "We were sitting around the kitchen table, having a cup of coffee and
> talking, and I asked Lynn Yeakle (who I knew worked at Lockheed) if he
knew
> anyone up there who knew anything about aerodynamic design. He hemmed and
> hawed a bit and finally admitted that he had graduated from college with a
> degree in aerodynamics. I was sitting there in my own kitchen with a
> *#!@"*& genius and didn't even know it!"
> Lynn, as many of you know, then designed the body on the #115 car ...
> perhaps the most underrated piece of aerodynamic design on the salt.
> These snippets of information along with the broad range of technical know
> how that come out on this list are fascinating and for me, as well as I am
> sure for many of you, welcome information / trivia / solid engineering to
> just hear.
> Thanks!
> Wes
> ----------
> > From: "Jim Dincau" <jdincau@qnet.com>
> > To: "Higginbotham Land Speed Racing"
> <saltrat@pro-blend.com>,<land-speed@autox.team.net>
> > Subject: Re: Re: Titanium-Brake clean
> > Date: Wed, 16 Feb 2000 21:50:35 -0800
> >
> >Hi all,
> >Lockheed had trouble with titanium parts for the SR-71 becoming
> contaminated
> >by chlorinated water being used to rinse parts. The chlorine gets into
the
> >metallic crystal lattice and causes stress fractures when exposed to
> thermal
> >cycling.
> >Jim in Palmdale
> >
> >
> >----- Original Message -----
> >From: Higginbotham Land Speed Racing <saltrat@pro-blend.com>
> >To: <land-speed@autox.team.net>
> >Sent: Wednesday, February 16, 2000 6:16 PM
> >Subject: Fwd: Re: Titanium-Brake clean
> >
> >
> >> >Date: Wed, 16 Feb 2000 18:15:15 -0800
> >> >To: Dick J <lsr_man@yahoo.com>
> >> >From: Higginbotham Land Speed Racing <saltrat@pro-blend.com>
> >> >Subject: Re: Titanium-Brake clean
> >> >
> >> >Close! Here's another one!
> >> >Chlorinated solvent and water makes hydrochloric acid under the right
> >> >temperature conditions. Not good for anything that is corrosion
> >susceptible.
> >> >Especially aircraft hydraulic systems. Which sometimes have Titanium
in
> >them.
> >> >Skip Higginbotham ( 80 today)
> >> >
> >> >At 11:21 AM 2/16/00 , you wrote:
> >> >>
> >> >>
> >> >>--- DOUG ODOM <popms@thegrid.net> wrote:
> >> >>> List, I just came across this.
> >> >>> "Do not use chlorinated solvents such as
> >> >>> "Brake Parts Cleaner" around
> >> >>> or on any titanium components (valves,
> >> >>> retainers, etc.)"
> >> >>> Does anybody know the reason for this or what
> >> >>> is the problem.
> >> >>
> >> >>
> >> >>I'll take a SWAG (scientific wild ass guess) at
> >> >>this. The titaniaum brake systems are composed
> >> >>of several pieces, some of which will probably be
> >> >>more common steel. The chlorinated liquid
> >> >>solvent could react between the steel parts,
> >> >>which act as a cathode, and the titanium part,
> >> >>which act as an anode, and you end up with a
> >> >>primitive chemical battery. The solvent changes
> >> >>it's chemical characteristics from straight
> >> >>chlorine to any number or chorides (salts) and at
> >> >>the same time changes the chemical composition of
> >> >>the steel and titanium, probably making them more
> >> >>brittle, if not actualy disolving them after long
> >> >>periods of time. Not good for brakes. How
> >> >>'bout one of you rocket scientists grading my
> >> >>paper and if it's right, I want to print it and
> >> >>take it home to my high school daughter! hee hee hee.
> >> >>
> >> >>=====
> >> >>.............................
> >> >>..........Dick J.............
> >> >>......(In East Texas)........
> >> >>....FX/GMR SC/P250-2........
> >> >>.....Shelby 427 Cobra.......
> >> >>.Hemis and Flatheads Forever.
> >> >>.............................
> >> >>Do You Yahoo!?
> >>
> >
> >
>
>
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