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Posted for "Lance A. Neibauer" <lancen@lancair.com>:

A few points on naylaflow and then I will say no more on the subject.  The
first rule is the simple one we all know, "If it ain't broke, don't fix
it".  While I'm all for preventive medicine, the nylaflow tube is nicely
tucked away inside a very protective steel gear leg and is not subject to
all the harsh treatments of which Brent speaks.  Sorry Brent.  Secondly,
ten years of operations and not one incident should speak volumes to ears
that care to listen.  Kinking upon installation is indeed the only hazard
that must be avoided, it's easy to detect, easy to repair - go do whatever
you want, this is the end of discussion here for me.
    The cronology of the hydraulic system development is not quite as
suggested, not that it really matters.  I recall having fits with the
system first designed by an outside firm that we oddly enough, no longer
buy from!  I had already abandoned this troublesome approach and was knee
deep researching mechanical valves when a helpful customer suggested the
same approach.  Figuring two for two is good, I proceeded with the idea and
yes, to Ross's dismay, chose to spend a Sunday morning ripping out the
entire defunct system so that all eyes could focus on the mechanical
approach that was already on the workbench, come Monday morning.  All
pretty moot stuff except a customer recently asked to use those spool
valves and I indicated my same thoughts about them.
    Regarding who is or is not capable of building an aircraft:  I know
lots of good builders who would not feel at all confident pressing out a
large diameter plated steel axle from a large mass aluminum component, yet
history has proven that those same folks can indeed build a very nice, safe
aircraft.
    So that leave me with the question of would we certify nylaflo in a
retractable Columbia?  Damn, don't get me started down that path because I
could fill a year's worth of Marv's site here with war stories that
absolutely defy logic.  But the answer is yes, it's possible.
    Do I sound a tad irritable?  Maybe the wrong foot hit the floor first
this morning.
  Lance

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