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To my knowlege, nobody ever modified any F4s. They
stayed "redundant". Not at all sure if any of the more current types
were designed with "scattered resources".
Same engineers that designed the F105 and F4 ... Jim S.
David Staten wrote:
The air force
and ANG had F4's as well.. did they re-design THOSE as well? or did
they just pray not to get nailed by the magic BB?
Dave
Jim Sower wrote:
<... When you route all 3 lines in the
same path ...>
I know. That's the difference between a "backup" system and a
"redundant" system.
In the mid '60s, the Air Force spent millions re-routing the backup
hydraulic system of the F-105 to the other side of the airplane from
the primary. The Navy wasn't so astute. ALL of the hydraulics of the
F4 came together like in one giant manifold in the center of the belly
(interestingly, right at the aim point :o) where one round would make
you ballistic.
Great engineering ... Jim S.
David Staten wrote:
Yea.. I believe it was an L-1011.. but the
problem was the uncontained engine failure caused the breach of all 3
engine driven hydraulic systems. When you route all 3 lines in the same
path.. well..
There IS a limit to the amount of redundancy you can have.. and how
much you can "armor" fluid lines and cable paths..
You can put enough redundant and protected systems into your craft that
it would be named "The Dodo Bird" because it would be too damn heavy to
fly.
Dave
Jim Sower wrote:
<... You do not have to have more than
one level of redundancy to basically eliminate any chance of total
failure of the system with failures in the 1000 hour range ...>
You might want to talk to the crew of that 757 or L1011 or whatever it
was that crashed in Souix City(?) a few years back because it lost ONE
of THREE engines and immediately went ballistic.
The devil made me say that :o) ... Jim S.
WALTER B KERR wrote:
Ian
I would think that in the case of airliners they have so many redundant
systems that if one goes down they have two or three others to continue
with, so there is no emergency situation in there case.
Georges
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You do not have to have more than one level of redundancy to basically
eliminate any chance of total failure of the system with failures in
the 1000 hour range such as fuses as long as the pilot has time to try
the backup system? I will take reduncancy ever day of the week compared
to a single CB circuit albeit it I have parallel master switch circuit
breaker's but I do not intend to reset one as long as the other is
working :>)
I know we are not changing anyone's veiws on CB vs fuses, but it has
been an interesting dialogue.
Bernie
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