File:American engineer and railroad journal (1893) (14758992482).jpg

Identifier: americanengineer71newy (find matches)
Title: American engineer and railroad journal
Year: 1893 (1890s)
Authors:
Subjects: Railroad engineering Engineering Railroads Railroad cars
Publisher: New York : M.N. Forney
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation

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e coast line battle-ships save in one particular, but that an important one—the addi-tional accommodation for the crew afforded by the forecastledeck. This is a very valuable feature. The contract offered a bonus to the contractors at the rate of;50,000 for every quarter of a knot over the required 16 andtne vessel thus earned a premium of $200,000 for her builders.This vessel is the last of those in which the builder gets any bonusfor speed in excess of contract requirements. On the trial trip the total indicated horse-power of the main en-gines was 11,834, the starboard engine making 108.81 revolutionsand the port engine 110.51 revolutions per minute. The boilerpressure averaged 161 pounds. The total indicated horse-powerof the main engines, including air, circulating and feed pumps,was 11,933.13 and the total indicated horse-power of all enginesin operation during the trial was 12,104.8 horse-power. The speed,as already stated, was 17.087 knots. 180 AMERICAN ENGINEER, CAR BUILDER
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z g o a o g Q. w acgto S CD c IB CO w t- - <-= AND RAILROAD JOURNAL. 151 The Cost of Operating Compressed Air Cars in New YorkCity* The 125th street line of the Third Avenue Railroad has a length of10,854 feet, making the round trip 4.11 miles, over which cable carsare operated at intervals of 2J^ minutes. Air cars were substitutedfor two of these cable cars, the schedule calling for 19 round tripseach, or 78.0!! miles per car, or a daily service of 156.18 miles besides1.14 miles of switching to and from the car-house and street tracks,making the total distance covered daily 157.32 miles. Each car runsfrom 12.50 to 16 67 miles on a single charge of air. The switchingreferred to is unavoidable in operating this service, owing to thearrangement of the car-house in relation to the street tracks, itbeing some distance from the terminal of the road. During a portion of the time only single service was performed,as at present, so that the total average mileage per day from Aug.3 to March

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