Identifier: railwaymechanica90newy (find matches)
Title: Railway mechanical engineer
Year: 1916 (1910s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York, N.Y. : Simmons-Boardman Pub. Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
present-day British locomotive practice, stead of a disproportionate amount of power being absorbedby moving the locomotive itself. As an example of a modern design of the 4-4-0 type loco-motive in England, there is illustrated herewith an engineof the Director class introduced on the Great Central Rail-way by the chief mechanical engineer, John G. Robinson.These engines have proved successful in every way in haul-ing the fastest and heaviest trains on that road. They areeconomical in fuel consumption, and as test runs have shownare capable of reaching very high speeds with heavy trainloads. In these engines it was sought to combine the neces-sary features for the development of a high power capacitywhile retaining a general construction which is simple. Thecylinders are placed between the frames at a distance of 2 ft.1 : in. between centers. Superheated steam is distributedto the cylinders by outside admission piston valves 10 in. in 395 396 RAILWAY MECHANICAL ENGINEER Vol. 90, No. 8
Text Appearing After Image:
ill t*>L--iz~**j*nw<»: .*i;-.n \l... -I. ll(l RAILWAY MECHANICAL ENGINEER 397 diameter which work above the cylinders. The cylinders arefitted with the Robinson pressure release valve, the two valvesat each end of the cylinder being combined in a single casting; thai is to say, there are two such castings, each containing two valves which communicate by means of a perforated connecting pipe. These pressure release valves combine thefunctions Of air valves, water relief valves and compression release valves when running without steam. The valve spindle packing, which is exposed to the super-heated steam, is composed of a special bronze instead of theusual lead and antimony white metal. The piston rod pack-ing which, owing to the expansion of the steam in the cylin-der, is always at a much lower temperature, is of the usualh .id antimony mixture. The packings are of the standardtype as used on non-superheater locomotives, as it is foundthat no need exists for special (lacking eve

Note About Images