Amtrak P40s that didn’t make the first cut for rebuilding wait their turn in Bear, Del., on June 7, 2010. Bob Johnston Q Whatever became of Amtrak’s P40s? They were numbered in the 800 series and looked very similar to the P42s in service today. What’s the difference between them? Does Amtrak still have any […]
This odd-looking signal serves to warn motorists. Sherman Cahal Q What can you tell me about this signal? – Carl Lehman, San Antonio A The photo was taken along the Baltimore & Ohio’s line in Greenfield, Ohio, and faces Baltimore Avenue, which runs parallel to the tracks through the city. The single top light will […]
An eastbound express Metra train, operating in push mode, pauses at Western Springs, Ill., on Sept. 10, 2009. You can see the engineer in the window of the cabcar. Paul Hoffmann Q What’s the difference in touch or feel for an engineer running in push mode versus pull mode? Is there a limit to the […]
Duluth & Northeastern No. 14 fills up at Cloquet, Minn., in 1958. William D. Middleton Q How did railroads in northern states keep water in tanks from freezing in the winter? Were the tanks heated and insulated, or filled just before use? – James Alain, Chassell, Mich. A Many water towers in colder climates had […]
CN SD60Fs meet train 393 as they move eastward at Aldershot West, Burlington, Ont., on May 5, 2006. Greg McDonnell Q I recently saw Canadian National Railway diesel No. 5553 switching a cut of cars in Cedar Rapids, Iowa, and was unable to determine who built this locomotive. It had six axles and no running […]
Southern Pacific cab-forward 4-8-8-2 No. 4219 leads an extra train at Dunsmuir, Calif., in August 1948. Guy L. Dunscomb, Martin E. Hansen collection Q On some early Union Pacific and Southern Pacific steam and diesel locomotives there is an “X” in front of the number. Why is this done? – Leon Bassik, Langhorne, Pa. A […]
Cummins QSK95 test locomotive No. 1919 uses Selective Catalytic Reduction aftertreatment of its exhaust. The system is located in the wing overhang; a urea and water solution tank is inside the forward portion of the fuel tank below the forward air reservoir. Chris Guss With Environmental Protection Agency Tier 4 emission regulations in effect for […]
Q I heard the term “nitrogen blanket” in reference to a tank car. Could you explain what this is and what types of tank cars have these nitrogen blankets? – Mike Riley, Manchester, Mo. A The term “nitrogen blanket” refers to a padding (or a layer) of nitrogen gas put into a tank car to: […]
A sleeping berth shown set for feet first in the direction of travel on an Amtrak long-distance train. Bob Johnston Q I previously understood that the safest position to sleep while traveling by train was with feet first, but the past Amtrak trips I took had the bed set up head first. Is there an […]
Home for the heaviest rebuild, repair, and repaint work on the Norfolk Southern system is the sprawling former Pennsylvania Railroad Juniata Shops in Altoona, Pa. The backshop is the heart of this operation in the Keystone State. Alex Mayes Diesel locomotives are amazing. They are built to withstand the rigors of service, running 24 hours […]
Dots painted on trilevel auto racks indicate clearance heights. Rob Burnet Q I have seen colored painted dots on freight cars, mostly multilevel auto rack cars. What do they signify? – Rob Burnet, Etobicoke, Ont., Canada A Colored marks on auto multi-levels are to designate slightly different deck height clearances on trilevels. Orange dots indicate […]
On Aug. 6, 2012, a single Illinois Central manned helper locomotive brings up the rear of a southbound Canadian National intermodal train working up Byron Hill on the Waukesha Subdivision near Byron, Wis. Tom Danneman Q How do locomotive engineers know they are doing equal work on trains equipped with manned helpers? – Robert A. […]
