kheindl(at)msn.com
Guest
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 Posted: Mon Jun 25, 2007 11:30 am Post subject: trigear vs. mono |
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Hello John,
I think there is a lot of truth in what you are hinting at. Us trigear
jockeys are having to pay dearly for shortcomings in the mono. I always
wondered if that mod 70 was based on a semi crash landing in a mono. All my
fittings are dead tight and hope they stay that way. Wasn't William's mono
involved also in a gear up landing ? As you say, the statistics about slop,
that has developed over time, would be very useful to know.
As a side issue I am again questioning the wisdom of mod 71 with the steel
springs. My Europa has turned into a bucking bronco on local grass strips,
and if I didn't take a firm grip on the control column, that mass balance
arm would be flying all over the place.
Karl
| Quote: | From: TELEDYNMCS(at)aol.com
Reply-To: europa-list(at)matronics.com
To: europa-list(at)matronics.com
Subject: Hole Enlongation vs. Landing Gear Type
Date: Mon, 25 Jun 2007 09:18:07 EDT
Greetings team,
As I read through the various theories of why the pin holes elongate I'm
left with a question that nobody seems to be asking (or maybe somebody did
ask
and I missed it).
This is a little out of my area of expertise, but it seems rational to me
that either a mono or a conventional gear Europa, i.e., one with a
tailwheel,
would transfer significantly more stress loads to the components in the
rear
of the aircraft, thus leading to more wear on everything back there. By
contrast, the trigear would dampen those stress loads by virtue of the main
gear
being a considerable distance from the parts in question, thus damping any
forces transferred to the tail area. Stresses transferred by a trigear
would
further be damped by the spring action of the main gear legs and the tires
(tyres).
Has anyone ever correlated pin wear to landing gear type? Are there more
mono's and conventional gear Europa's showing pin wear and or hole
elongation
than trigears?
In my case, N245E, a trigear, now has a bit over 100 hours TT. About 90%
of
the take offs and landings thus far have been made from my grass strip and
my
pip pins are still tight as a tick. I have observed no increased play in
the
tailplanes and only a slight amount of play in the trim tabs and that
hasn't
changed since day one. I've also looked closely at all the hardware in the
tail and I cannot detect any wear on any components whatsoever. I know
this is
anecdotal at best, but it seams reasonable for those in the know to
correla
te pin wear to landing gear type as they chase down the root cause of the
wear
that caused the tailplane flutter.
Regards,
John Lawton
Whitwell, TN (TN89)
N245E - Flying
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