only)
On 11/22/2011 01:35 AM, Nigel Graham wrote:
> Don't forget that this mounting point was originally designed and
> stressed to mount the outrigger on the original mono-wheel. Consider if
> you will, the compressive shock loads imposed by an unforgiving landing
> on rough grass,
Yes, I realize that. But what is the duration of a landing roll compared
to a whole night in constant movement due to the wind? it is unlikely
that you will experience metal fatigue just due to the landings, but how
about prolonged rocking in the wind? Isn't this the same reason why we
try to restrain the flight controls while parked in the wind? Normal
rudder use is different than constant movement due to the wind, although
the movement by itself is similar.
> or the lateral loads imposed during turning.
I don't have a mono but I think the lateral load is taken up solely by
the main gear, and the outrigger just keeps the wing of the ground.
I doubt that the hinge attach points will see any sideways loads at all
during their life, that is, if they are used for their intended purposes
only.
It is just a piece of metal sticking out of the wing, I can imagine that
it can easily develop metal fatigue just at the edge where it protrudes
if you wiggle it long enough. The material and the construction both
indicate that it is not designed for this kind of movement, but I'm not
a metallurgist so I could be wrong.
Frans
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