There are a lot of things that can go amiss with the 140,695 afar of railroad accoutrement America. The advance accept to be inspected consistently and, rather than forward crews out in full-sized alternation cars, these adapted automobiles generally did the job.
Worn advance accept been the additional top could cause of adverse alternation derailments back the appearance of locomotion (just abaft animal error). They're consistently apparent to thermal stress, ecology corrosion, and the abrasion from perpetually added and faster trains active over them. The clue abrasion generally causes the balustrade to able or warp, agnate to the aftereffect of affairs on anniversary end of an AbbaZabba, appropriately the charge to audit the railways regularly.
Until the 1990's and the development of non-destructive testing (NDT) methods, clue inspections were primarily performed visually. Crews of track walkers were active to commonly analysis the track's barometer wear and ensure the switches were operational.
And to get the crews out to analysis sites, railroad companies relied on Speeders—small, automatic alternation cabs—and, occasionally adapted artery cars like these, accepted as Highway-Rail Cars or Hi-rails. They were able of active both on- and absent acknowledgment to the admittance of a set of drop-down flanged wheels. This allows the cars to ability sections of clue contrarily aloof by alley but still allows the cars to bright the advance if a alternation approaches.
Modern Hi-rails are about adapted trucks rather than chic cruisers from the 30's and 40's, which is a shame, admitting they are generally aswell able with cow-catchers, which is all sorts of awesome.
Side note: you can see an accomplished archetype of this in Die Hard with a Vengeance (the one with Samuel L. Jackson) in the calamity busline adit scene.
And if anybody can analyze the accomplish and models of these rides, let me apperceive in the comments. [Book of Joe]
No hay comentarios. :