So, these fuel sensors?

From the description on the press conference video, these seem pretty crude
devices, relying on the resistance of wire in cryogenic submesion to
generate the wet signal.

It does rather amaze me that so many launchers still use such devices, and
that the connections to them are also so crude. Of course, in a use once
environment, I suspect nobody thought about the cycling problems of tanking
and untanking, but still, although I did not quite follow the description of
how having four of these would impact fail dry or wet messages in the way
described, I'd have thought four would be enough...

I wonder if there is perhaps some mileage in the fast freading of these
sensors, as any connection derived resistance changes is going to be quite
a lot more rapid, I'd imagine, than the temperature sensitive element
changes. So if rapid fluctuations do occur, that sensor could be masked out.

Brian

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Makes note not to trust spellchecker suggestions so much in future....

Brian

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"Brian Gaff" wrote in message
. uk...
From the description on the press conference video, these seem pretty
crude
devices, relying on the resistance of wire in cryogenic submesion to
generate the wet signal.

It does rather amaze me that so many launchers still use such devices, and
that the connections to them are also so crude. Of course, in a use once
environment, I suspect nobody thought about the cycling problems of
tanking
and untanking, but still, although I did not quite follow the description
of
how having four of these would impact fail dry or wet messages in the way
described, I'd have thought four would be enough...

I wonder if there is perhaps some mileage in the fast freading of these
sensors, as any connection derived resistance changes is going to be
quite
a lot more rapid, I'd imagine, than the temperature sensitive element
changes. So if rapid fluctuations do occur, that sensor could be masked
out.

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________
__________________________________

"Brian Gaff" wrote:
From the description on the press conference video, these seem pretty crude
devices, relying on the resistance of wire in cryogenic submesion to
generate the wet signal.

Poor NASA. The get crapped on for using high tech, they get crapped
on for using low tech.

A hint for the armchair engineers out the Crude works. Simple
works.

D.
--
Touch-twice life. Eat. Drink. Laugh.

-Resolved: To be more temperate in my postings.
Oct 5th, 2004 JDL