2024年12月16日 · In 1940 the first, true cow-calf model was outshopped by EMD; designated class TR (TRansfer), it was based on the popular 1,000 horsepower NW2. However, instead of Winton prime movers the locomotive featured EMD's …

Late 1950 EMD demonstrated their TR-6 set, numbered 1600 and 1600B, on the SP's Mina and Fallon branches. Due to the success of these, SP purchased these demonstrators, (in April 1951), kept the attractive two-tone red paint, and simply overpainted the Electro-Motive name with Southern Pacific.

The following is a list of locomotives produced by the Electro-Motive Corporation (EMC), and its successors General Motors Electro-Motive Division (GM-EMD) and Electro-Motive Diesel (EMD). EMC participated in the construction of a number of motorized railcars, integrated streamliner trainsets, and experimental locomotives in the 1930s.

The TR6 is a SW8 based cow/calf combination. 657B, 8 cyl. the companion TR6A was no.1103.

Section 7 is devoted exclusively to a description and discussion of the operation of the TR5 and TR6 Transfer locomotives. The principle articles of each section are numbered consecutively for ready reference, as is each page of the section. Articles and pages are numbered in the 100 series type of numbering.

2014年10月24日 · Technically a cow and calf are two switch engines both with prime movers permanently coupled together where one does not have a cab. Only made by EMC and EMD. A switch engine and a slug are not a cow calf. Neither is every cabless road unit a calf, e.g. all the GP9B, GP30B, SD24B, SD45B, etc. are not calves they are just B units.

In December, 2004, the Feather River Rail Society added another historic locomotive to its collection at the Portola Railroad Museum. The unit is an EMD TR6 switching locomotive built as a demonstrator and sold to Southern Pacific. A brief his-tory follows: Electro Motive Corporation was a builder of gas-electric motor cars and diesel engines.

Model: TR6 Prime Mover: EMD 8-567B Builder: Electro-Motive Division. Horsepower: 800 Built: Oct 1950

As delivered in 1951, the TR-6 had a single-chime horn mounted on the cab front wall. Not until the 1980 shot does the three-chime horn show up on the roof, at the front. The TR-6 A & B units, in common with the SW-8's, were equipped with small pilot plows, on the 'front' end only. This detail would require different mounting of the footboards.

In 1940, EMC built 3 drawbar-connected cab-and-booster NW2 sets for moving trains short distances from one railroad to another. These transfer units were nicknamed "Cow-Calf". Unlike Slugs, the "B" units had prime mover diesel engines, with exhaust stacks and radiators.