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Again, I'm finding myself agreeing with Brent. This time re: hard vs. flex
hoses.

You all might be interested that on the B-1, we used HARD LINES on the nose
retraction transfer lines - that is, from hard, fixed fittings on the nose
well bulkhead, to the hydro actuators on the nose gear struts. These things
swing about 90 degrees and the hard lines are Ti tubes. The secret is, both
lines are coiled about four or five times to make a coil of about 12 inches
diameter. All the required flex is taken up by the coils winding up or
unwinding when the gear retracts or extends. Of course, flex lines are
notoriously unreliable at 6000 psi, but the concept could work anywhere.

Dan Schaefer

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