Shimmy effect on LG
Shimmy effect on LG
(OP)
What is the shimmy effect on the landing gears? does it deal with gyroscopic phenomena?
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RE: Shimmy effect on LG
RE: Shimmy effect on LG
a quick google for "landing gear shimmy" found lots of hits, including one with ...
"Shimmy is an oscillation in aircraft landing gear that can occur both on landing and take-off, typically in a band of velocities. It causes excessive wear on components and can cause accidents. The nose wheel is roughly like a caster on a shopping trolley: the horizontal axle of the wheel is mounted in an assembly that is free to rotate about a vertical axis. Shimmy is (or at least includes) oscillation of the wheel assembly about this vertical axis. The current engineering approach has little understanding of the physical mechanisms causing shimmy, but relies on the use of shimmy dampers, and on systematic maintenance and replacement of landing gear components."
hope that helps your assignment ...
RE: Shimmy effect on LG
h
B.E.
RE: Shimmy effect on LG
RE: Shimmy effect on LG
THAT was one hell of shimmy!!
RE: Shimmy effect on LG
Is that true? Or is just somebody expressing their own ignorance?
Cheers
Greg Locock
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RE: Shimmy effect on LG
The wheel may easily be statically balanced but dynamic balancing is more difficult to achieve. The average nose wheel won't fit an automotive wheel balancer.
RE: Shimmy effect on LG
It doesen't seem to be a factor much on takeoff.
In those photos, it looks like the pilot was running out of runway and braking hard. He may have just touched down too far down the runway or not had good control of his airspeed.
Sometimes, just going around and not trying to salvage a poorly executed approach can save a lot of money.
RE: Shimmy effect on LG