Setting a New Trend

The two locomotives you see on the front of this post card are Geep 7s.

The first diesel powered locomotives appeared on the American railroad scene in the middle of the 1920s. These locomotives were used mostly for rail yard switching because the locomotives themselves were small and did not have a lot of horsepower. In 1934 Burlington Railroad introduced the Zephyr streamlined passenger train. It was diesel powered and could achieve speeds over 100 miles per hour. The railroad industry took notice. However, the transition from steam to diesel was slowed by World War II when locomotive factories were more focused on war production than on modernization. After the war, railroads started to replace their steam with diesels en masse. Still recovering from their focus on the war effort, most railroads were not interested in spending their hard-earned cash for diesels locomotives that would probably spend most of their lives in services in yards and on secondary route. To satisfy this need General Motor’s Electro Motive Division (EMD) designed the GP7 as cheaply as possible. The locomotive was also given the name “General Purpose”. This was shortened to “Geep”; so, the locomotives you see on the front of this post card are called Geep 7s. To keep costs down, EMD incorporated as many redundancies into the model as possible, enabling the GP7 to perform practically any task from switching and branch line assignments to general road service. The GP7 utilized EMD's standard prime mover at the time - also found in the popular F7 - the 16-cylinder, model 567B. Internal components were also similar; a model D12B main generator, D27C traction motors, and Blomberg trucks. The GP7 was offered in six different gear ratios, depending on a railroad's needs. The low cost encouraged railroads to replace their steam locomotives. By about 1960, the conversion was basically finished. The “Geep 7” was so effective and cost-efficient and useful that the total built was 2,729 between October of 1949 and May of 1954. For a great history of the "Geep 7" (and following models) go to https://www.american-rails.com/9227.html

The picture on the front of the post card was taken by Robert R. Harmen. Robert has published at least twelve articles in Railfan, Trains, CTC Board, Short Line, and probably something else. The post card was published by Audio Visual Designs. Established in 1964 by Carl H. Sturner of Earlton, NY, Audio-Visual Designs originally focused on providing railroad post cards and reel to reel audio tapes of trains in action. I have 333 of their post cards in my collection; that is 10% of my collection!! Here is a link to their website: https://www.audiovisualdesigns.com/