Roaring rails

Roaring rails is a phenomenon of short-wave corrugation observed in railroad tracks. Despite being a widely observed type of railroad track deformity, the reason it occurs was not known or researched until recently.

Introduction

Roaring rails are very short wave corrugations that range from 25 to 75 millimeters in length. It is commonly associated with high speed passenger, transit, and light axle load railroad operations.

Causes

It is generally accepted that a few distinct causes lie behind different wavelengths of railroad corrugation. One study indicates that the specific short-wave railroad deformity is mainly caused by pinned-pinned resonance, in which the rail vibrates as a fixed beam, as if pinned between periodically placed sleepers. The dynamic train-track interaction that causes fixed frequency vibrations at high speeds, commonly observed in light load metro operations, and the anti-resonance caused by the pinning of the rails on sleepers, causes deformation and the "roaring" corrugation of the rails.

Roaring Rails

Roaring Rails is a 1924 American action film featuring Harry Carey.

Cast

Preservation status

On December 14, 2011, Turner Classic Movies aired a print of this film restored by George Eastman House in 2010.

See also

External links