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Clark,
The all-metal nuts we used on AF
jet engines exceeded the tensile strength of
AN components for equivalent
size fasteners, but I don't have the data for these specific parts. One
consideration is that the MS nuts don't have as much bearing surface, so I'd
suggest using only the standard (vice the thin) washers with them when applying
to composite and other "soft" materials, and carefully watch the tightening
torque. From personal experience, the thin washers, combined with overtightening
that is typical without aid of a torque wrench, will "cone" the washers and
supporting material--especially composites.
Although I don't see how you could spare it, most of the rest of us
could achieve even better weight savings, and improve our general lot in life in
by a modest diet...
Bob
Anyone have any guidance on what
applications of standard AN365 stopnuts one should NOT replace with the
lighter MS21042 all metal stopnuts (~40% the weight of an equivalent
AN365)? Any comments Brent R.?
With the fuselage still open, one
could replace almost every nut in the plane in a day and save 2-3
pounds. But maybe there are some nuts (e.g. large structural ones in the
gearbox) I should leave as AN365.
Any suggestions? Thanks, Clark
Still (New York, 100% TB20, 44%
LIVPT)
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