what are the methods to avoid shimming in aircraft nose wheel?

Question

my options are have twin tyres
have anti shimming device with restricted flow valve
anything else u can throw light on

Answer 1

I'm gonna guess you're talking about shimmy, which is when the wheel vibrates directionally in an uncontrollable fashion.

Most light aircraft that feature nose gear steering linked to the rudder pedals have a shimmy damper, which basically absorbs lateral shock loads, you can see them, or variants, on the handlebars of high end sportbikes in various configurations.

Beech, as a manufacturer, has stayed with shimmy dampers and a single nose landing gear. What's the point of adding another 30 pounds of tire and wheel as well as the additional hydraulics to pull it up when a single wheel and tire can carry the same load as easily and only require a 2 pound shimmy damper to stabilize it?

Some aircraft, such as the DA-20 Katana, utilize a castering nose landing gear, with a single tire, and have no method of controlling nose gear shimmy. Other aircraft, without positive nose gear steering inputs, such as the Grumman Albatross and the T-28, still feature shimmy dampers.

On aircraft with hydraulic NLG steering, a feature of the Piper Aerostar, (light piston twin,) and common to light jets, the steering actuator itself functions as a shimmy damper.

Even on aircraft with dual NLG tires, you still have to worry about shimmy in the event of a blowout, hydraulic failure, or electrical failure in some cases.

Think about it; you have a 12,000# or better tricycle, that you're riding along at 130mph, having twin front tires isn't going to save you in the event that one of them lets go, unless you have some other means to keep your remaining tire under control.

With a castering NLG, like the Katana or Cirrus, if you blow a single tire, you'll make it off the runway safely on landing. On a higher performance aircraft, with a blown single NLG tire, you're also likely to make it off the runway safely.

As there's already the equivalent of a shock absorber, (your anti shimming device,) incorporated into the landing gear of most aircraft, adding additional wheels and tires to the nose truck or more shimmy dampers, would actually decrease the performance of the aircraft, raise the (already expensive,) cost of flying and complicate maintenance.

And yes, I've taken apart shimmy dampers and put them back together. Do you have any idea how hard it is to get the smell of old hydraulic fluid out of your clothes?

Why not save yourself some effort? Leave engineering design to the engineers, production to the manufacturers, maintenance to trained professionals, and deciding what needs to be changed to the test pilots.

DGI

Answer 2

yeah, on landing roll, keep and hold the yoke until it is fully aft, keeping the weight of the aircraft on the wings much longer than putting it on the gear too quickly, inducing the shimmy. Brakes on to slow you down evenly after all wheels are down will help aswell

Answer 3

Different plane have one of a kind forms of nosewheel steerage. You ought to work out which plane's approach you wish to replicate then seem on the preservation manuals for that distinct plane.

Answer 4

Make sure the front wheel is balanced and the shimmy damper is working,

Answer 5

Hold the nose off the ground as long as possible

Answer 6

Have the suckers ballanced