ESD & EMI(AKA RFI) can be a real problem at
especially at Bonneville. My biggest surprise
was finding out that everything except Copper
and Silver are crappy conductors. Some relative
(Copper = 1) numbers:
Silver 1.064
Copper 1.000
Steel .087 - .133
Iron, Pure .178
Iron, cast .057
(source MIL-HDBK-419A)
Sooo.. proper grounding & shielding takes
a lot of copper. Using a steel chassis
for ground is, at best, fair.
Bryan Savage (that's from my list of things I
really didn't want to know)
Skip & Joyce Higginbotham wrote:
>
> Hi Mayf,
> I have lost my files on Aero due to a large computer crash.......
> Do you know the coefficient of drag for a '53 Stude? And how does it
> compare with a Firebird?
> Pretty frustrating when I can't find my stuff!
> Thanks in advance.
> Skip Higginbotham (Who has verified that the old and the new do not
> mix......Talk about systems integration....a Vertex and an EFI......EMI?
> #@$%*&^^ What fun.)
>
> At 09:03 AM 9/8/00 , you wrote:
> >I have been wathing both threads with some interest. After doing a little
> >thinking (very little, getting old), I remembered a cautionary note from deep
> >in the recesses of my mind on using Nitrogen to fill your race car tires.
> >When I first went to work for Boeing, about a thousand years ago, I worked in
> >Flight Test at Boeing Field. While thee there was a terrible accident in the
> >hangar. A mechanic had the task of filling a demounted 727, or maybe it was
> >a 707, main landing gear tire with Nitrogen. Boeing used a cart with I
> >believe it was 8 full K bottles (220 cu ft) of Nitrogen connected to a
> >manifold and regulator. He connected to fillinf hose to the tire, which was
> >laying flat on a pallet and began the filling process in which he set the
> >regulator to the proper pressure. The lunch bell rang and he went off to
> >lunch. He returned to the task right after lunch and when he reached the
> >tire, it exploded. It blew him completely in half with body parts going every
> >where. Of course he died instantly. Now, the investigation showed that the
> >regulator leaked and permitted the tire and K bottles to come to an equal
> >pressure, a very high pressure. The cautionary note for us is that the use of
> >nitrogen to fill our tires through regulators whic get very little attention
> >in the way of maintenance (prolly - assuming here), may prove to be a
> >dangerous task indeed. So if you go this way and it is a good way, be very
> >cautious in handling the regulator and oteher items and never leave the
> >system connected to the tire.
> >
> >On categories,,,did I read that to have another class, there needs to be at
> >least three cars requiring the new class. How many does it take for a new
> >category which may involve lots of new classes within that category? Are
> >there that many cars waiting to run and are now just running for time? I
> >have no doubt that the organizational effort needed to conduct more classes
> >is manageable because it is just book keeping. The only added effort is in
> >training inspectors to recognize the non allowable hardware. Being somewhat
> >cynical, I have to ask this question: why is this being contemplated? How
> >many cars are there that do not have a class in today's set of categories and
> >classes? Is this just and end run to allow a few more people to become record
> >holders with their present cars which are not competetive? Since I have a
> >little bit of familarity with the girly Camaro of Keith's IU'll use it as an
> >example, hoping he doesn't get angry with me. Keith could very well go to the
> >salvage yard and acquire a more aerodynamic Firebird body fairly easily.
> >Transferring the mechanicals to the new car would involve probably just
> >effort and little outlay. I am sure that this capabi;lity exists for others
> >as well, so where's the beef? Why is beiong contemplated? Spell it out for
> >me? Actually I don't care, but there seems to be a hidden agenda here. And as
> >fo Keith he is going to build a monster BMS vehicle soon, so I am sure this
> >doesn't affect him very much (I hope, he was the only car I could think
> >of...and he is my bud).
> >
> >mayf
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