. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . cf in the preceding paragraph. A 10-inch wrench is large enough to set upwedges with, and it is not so liable tostick the driver box as when a larger oneis used. Jas. Spellen, Road Foreman of Engines,B., R. & P. , Pa. Shields on Locomotives. Editor: The subject of shielding locomotives inorder to reduce atmospheric resistance,which is very considerable at high speeds,has been touched on briefly from time totime in the columns of railway engineer-ing magazines and there have appeareda
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . cf in the preceding paragraph. A 10-inch wrench is large enough to set upwedges with, and it is not so liable tostick the driver box as when a larger oneis used. Jas. Spellen, Road Foreman of Engines,B., R. & P. , Pa. Shields on Locomotives. Editor: The subject of shielding locomotives inorder to reduce atmospheric resistance,which is very considerable at high speeds,has been touched on briefly from time totime in the columns of railway engineer-ing magazines and there have appeareda few illustrations of certain locomotiveson European railways that have beenpartially equipped with these shields. Theincreased efficiency that such shieldswould give to our modern express loco-motives can be ascertained correctly onlyby experiment, yet a fair approximationto correct results can be obtained theoreti-cally by making use of a few well-knownprinciples in mechanics. In the treatment to follow it is as-sumed that the shielding is to be appliedonly to fast passenger locomotives run-. FIG. 2.—LOCOMOTIVE PROTECTED WITH WIND DEFLECTING SHIELDS. their greatest pull on the crank pins anddriver journals. This pull has a tend-ency to wear the cranks and journals outof round, and if we calliper the cranksand journals of locomotives after theyhave been in service for any length of time,we shall find that the smaller part ofthem is about where the engine is pass-ing the quarter, and the larger parts willbe where the centers are passed. Thenif we should place the engine on the topquarter and adjust the driver wedges andkey the rod brasses, we are doing thissetting and keying on the small part ofthe aforesaid bearings, and when the largepart of bearings come round, the driverbox brasses and the side and main rodbrasses are going to grip the parts wherethey are the largest, and the result is hot wedges. The adjustment can then bemade to a nicety. Rod brasses should bekeyed in t
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