FADEC = complex

Kev writes:

Of course, neither setup can prevent a sudden cylinder failure, or oil
pump, or fuel pump, or vacuum pump, or other such mechanical
commonality.

Note, however, that digital systems are _far_ more likely to react to
unexpected events in a very extreme way. An oil-pump failure can
cause a catastrophic system failure almost instantly if the digital
system isn't designed to take into account the possibility of an
oil-pump failure.

--
Transpose mxsmanic and gmail to reach me by e-mail.

Of course, neither setup can prevent a sudden cylinder failure, or oil
pump, or fuel pump, or vacuum pump, or other such mechanical
commonality.

Note, however, that digital systems are _far_ more likely to react to
unexpected events in a very extreme way. An oil-pump failure can
cause a catastrophic system failure almost instantly if the digital
system isn't designed to take into account the possibility of an
oil-pump failure.

Utter nonsense. Tell us, how a oil pump failure is made worse, with FADEC?

Explain how FADEC could be made to take into account a oil pump failure, or how
not having FADEC makes the oil pump failure any better of a situation.

You are making things up as you go, now.

But that is what a troll does.
--
Jim in NC

Morgans writes:

Tell us, how a oil pump failure is made worse, with FADEC?

The software may not be designed to anticipate and react to an
oil-pump failure. The failure may cause the software to follow and
unexpected and unpredicted path, or it may cause a fault in the
software; both can produce catastrophic results.

The error may be one of system design (inadequate specifications), or
one of coding (careless writing or testing of code).

Explain how FADEC could be made to take into account a oil
pump failure, or how not having FADEC makes the oil pump failure
any better of a situation.

I'm not an engine specialist, so I'm not sure how best to deal with an
oil-pump failure.

--
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Mxsmanic,

I'm not an engine specialist,


Oh, really?

--
Thomas Borchert (EDDH)

Recently, Mxsmanic posted:

I'm not an engine specialist, so I'm not sure how best to deal with an
oil-pump failure.

Damn! You had *me* fooled!

Neil

"Mxsmanic" wrote in message
...
Morgans writes:

Tell us, how a oil pump failure is made worse, with FADEC?

The software may not be designed to anticipate and react to an
oil-pump failure. The failure may cause the software to follow and
unexpected and unpredicted path, or it may cause a fault in the
software; both can produce catastrophic results.

What type of catastrophic result? What would you expect the software to
anticipate? What type of path might it follow?

What exactly does FADEC control in a air cooled, opposed cylinder, internal
combustion airplane engine, anyway? Do you know?

The error may be one of system design (inadequate specifications), or
one of coding (careless writing or testing of code).

Surely with your vast knowlege of writing systems like FADEC, an occurance like
an oil pump failure would be easy for you to anticipate. What would you have
the FADEC system do, if it were you?

I'm not an engine specialist, so I'm not sure how best to deal with an
oil-pump failure.

That is the first accurate and truthful statement I have ever seen you write in
this forum. Congratulations.
--
Jim in NC

Morgans writes:

What type of catastrophic result?

I don't know; if you can predict a catastrophic result, you can avoid
the catastrophe.

What would you expect the software to anticipate?

I don't have specific expectations. One cannot really anticipate
everything, but the better the software, the more possibilities it is
designed to handle.

What exactly does FADEC control in a air cooled, opposed cylinder, internal
combustion airplane engine, anyway? Do you know?

That depends on the design of the FADEC, and of the engine.

Surely with your vast knowlege of writing systems like FADEC, an occurance like
an oil pump failure would be easy for you to anticipate.

I haven't written FADEC software, and every module is different,
anyway.

--
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Morgans wrote:
Utter nonsense. Tell us, how a oil pump failure is made worse, with FADEC?
[...]
You are making things up as you go, now.
But that is what a troll does.

Then you must be a troll, too. Here's an example of how a pump failure
ended up being worse because a FADEC was indirectly involved.

http://www.defenselink.mil/news/Apr2...200104093.html

Basically, the pump failed and a warning light came on. Following SOP,
the pilot recycled the computers. A software bug caused the FADEC to
cycle the rotor pitch. Eventually the recycling caused a crash,
killing four Marines.

If there'd been no FADEC, all that would've happened is that the pilot
would've seen a pump failure light and landed. (This aspect is covered
in other reports.)

Kev

In article .com,
"Kev" wrote:

If there'd been no FADEC, all that would've happened is that the pilot
would've seen a pump failure light and landed. (This aspect is covered
in other reports.)

FADEC wasn't the cause. The problem was the failure of the engineering
team not addressing basic safety considerations like system states during
reset/startup.

--
Bob Noel
Looking for a sig the
lawyers will hate