. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . about 105 mileswest of Roanoke, and extends from Blue-field to Vivian, a distance of about 30miles. This section is double track per cent, for miles, and finally up per cent, grade for three miles intoIduefield, the easterly end of the 60 per cent, of the line is on curves,the maximum being about 12 degrees. The electrification of this section isfor the purpose of more readily collect-ing from the mine sidings and yards inthe coal fields the entire eastbound coaltonn
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . about 105 mileswest of Roanoke, and extends from Blue-field to Vivian, a distance of about 30miles. This section is double track per cent, for miles, and finally up per cent, grade for three miles intoIduefield, the easterly end of the 60 per cent, of the line is on curves,the maximum being about 12 degrees. The electrification of this section isfor the purpose of more readily collect-ing from the mine sidings and yards inthe coal fields the entire eastbound coaltonnage and transporting it over the sum-mit to Rluefield. From thence it is is about 6 miles per hour, taking about7 minutes, while the electric locomotivespass through the tunnel in 3 minutes. The heavy trains of 3,250 tons requiredthree steam locomotives over the entiresection. These locomotives are of theheavy Mallet type, equipped with super-heaters and mechanical stokers. Underelectric operation a single road engineis used over the division, and a pusher,also electric, is added up the and 2. TYPE OF ELECTRIC LOCOMOTIVE ON THE NORFOLK & WESTERN RAILWAY. throughout, except in the Elkhorn tun-nel, which is single track. There is alsoa large amount of third track, or passingsidings and branches into the coal work-ings, and yard trackings. The grades vary from per cent, atthe west end to per cent, up thegrade, to and through the summit tunnel,a distance of about 10 miles, thendescends on a per cent, grade forabout a mile and rises again about shipped east to various points, chiefly tothe companys marine shipping pier atLamberts Point, near Norfolk, Va. Theheavy freight trains are moved by electriclocomotives at a speed up the grades of14 miles per hour, as compared withabout 7lA miles per hour under steamoperation. The effect of increased speedis especially marked at Elkhorn tunnel,3,000 feet long on per cent, grade,where under steam the speed up grade per
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