[Diy_efi] Newbie with a simplified Motronic project

[Mike]

Gold is pretty good - you can bubble oxygen through molten white
hot gold and it wont react !

Nickel/Vanadium/Chromium superalloys are quite good though :)

Rgds

Mike
PS: Not the original poster, and anyway all above are time dependent
on normal proton decay in 10^31 years <sigh>



At 09:05 AM 4/11/2002 +1300, you wrote:
>
>----- Original Message -----
From: "Adam Wade" <espresso_doppio at yahoo.com>
>To: <diy_efi at diy-efi.org>
>Sent: Sunday, November 03, 2002 4:34 PM
>Subject: Re: [Diy_efi] Newbie with a simplified Motronic project
>
>
>> --- Eric D Byrd <klox at juno.com> wrote:
>>
>> > Every electrical component ever manufactured
>> > eventually -- eventually -- experiences changes in
>> > its operating characteristics due to age, especially
>> > if heat is involved, and more especially if extreme
>> > variation of temperature is involved.
>>
>> True, except this isn't a sensor in the traditional
>> sense.  It's simply a resistive wire, and if that
>> changes its resistance vs. temperature profile, then
>> we'll have to rewrite physics!  :D
>>
>> If there is a solid-state temperature sensor involved,
>> then there's definitely more of a reason to worry
>> about calibration changing, however.
>Any time you want precision comparison (or measurement) you should be
>worried about the comparison (or measurement) device changing value.  How
>accurately you want to measure corresponds to how much you should worry...
>
>
>> > And you are right, physics does not go out of
>> > calibration.  The trouble is, the devices we build
>> > often don't account for physical effects that seem
>> > irrelevant, or that we don't know about.
>>
>> Therein lies the learning curve.  ;)  Many of these
>> manufacturers (Bosch especially) have been doing this
>> for eons, just about, and they don't tend to get
>> surprised too often.  ;)
>>
>> > It's a mistake to assume a device will never
>> > experience variations in its response, from
>> > physical effects we haven't accounted for.
>>
>> Again, it would be a pretty spectacular upheaval of
>> the laws of physics if a stable metal changed its
>> resistive characteristics over time, AFAIK.  ;)
>
>What's a stable metal???
>Certainly none that I know of.
>Iron reacts with oxygen to give various IronOxides.
>Aluminium reacts with oxygen to give AluminiumOxide
>Copper easily tarnishes, and reacts with oxygen, chlorine, bromine, pretty
>mcuh anything
>Sodium can jetboat around on water, before bursting into flame.
>
>I'm not sure of where you can obtain a stable metal.
>
>
>> > It's worthwhile to educate, and be educated.  But I
>> > have better things to do with my time, than trade
>> > verbal abuse.
>
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