The New Zealand Railways Magazine, Volume 4, Issue 6 (October 1, 1929)
Modern Methods in our Workshops
The air compressors used in most of the Railway Workshops prior to the reorganisation were steam-driven, and ran at a speed of from 90 to 100 revolutions per minute. These compressors were only large enough to supply a very limited number of pneumatic tools throughout the shops. Thus difficulty was not infrequently experienced in maintaining the necessary air pressure to enable the pneumatic drills, chippers, riveters, hoists and grinders to be worked at the maximum capacity. (One of these steam-driven compressors is shown in the illustration marked No. 1.)
With the coming of the new order in the Workshops and the introduction of modern pneumatic appliances, it was found necessary to instal electrically-driven high-speed compressors, running at a speed up to 300 revolutions per minute. A typical installation is shewn in illustration No. 2, which features a 100 h.p. motor coupled to an air compressor with Lennix short centre drive. The compressor has a capacity of 650 cubic feet of free air per minute.
Another great improvement affecting the supply of air has been the replacement of the old, small bore, service pipes with large pipes designed to deliver air to every part of the shops at a definite and maintained pressure with a minimum of pipe line friction, thus enabling all tools to be worked at their maximum efficiency. By virtue of these modern pneumatic installations much laborious manual work has been eliminated.
Work that had formerly to be done by hand can be more expeditiously performed by the use of power-driven tools. The use of compressed air and pneumatically operated appliances has proved to be a convenient and effective method of providing a flexible supply of power to portable machines, thus effecting a considerable saving in workshop operations.page break
“Its brilliant hues with all their beams unshorn, Resembling, ‘mid the torture of the scene, Love watching Madness with unalterable mein.”
A party of Railway excursionists at the foot of the famous Hochstetter Ice Falls, (flowing two miles wide into the Tasman Glacier), Southern Alps, South Island, New Zealand.