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holley.com. Holley Performance Products is an automotive performance company based in Bowling Green, Kentucky. It was founded in 1896 in Bradford, Pennsylvania, by George Holley and Earl Holley. When the company was based in Michigan it was a major producer of carburetors for many Detroit-built automobiles. Later they manufactured carburetors ...
The Pennsylvania Railroad class Q1, #6130, was a single experimental steam locomotive designed for dual service. The locomotive entered service in 1942, and retired in 1949 after accumulating a relatively low 165,000 service miles. The Q1 had a 4-6-4-4 wheel arrangement, consisting of a four-wheel leading truck, two sets of driving wheels (six ...
The 4-6-4+4-6-4 was the fifth most common Garratt wheel arrangement, with 84 locomotives constructed, 74 by Garratt patent owner Beyer, Peacock & Company between 1936 and 1950 and ten under sub-contract from Beyer, Peacock by Belgian manufacturer Société Franco-Belge in 1952. [1][2] Only three railway systems used this wheel arrangement.
Unlike other experimental duplex engines like PRR's Class Q1 #6130 4-6-4-4, there were no flangeless wheels or blind drivers adopted on S1. In March 1938, a Chicago and North Western class E-4 4-6-4 "Hudson" #4003 was tested by PRR at Altoona. [9] Based on the test results, PRR decided to adopt 84" drivers and a cylinder pressure of 300 psi for ...
The 4-6-4 tank locomotive configuration was a popular type with the Western Australian Government Railways. The D class was introduced for suburban passenger service in 1912. Its successors, both also of the 4-6-4T wheel arrangement, were the Dm class of 1945 that was rebuilt from older E class 4-6-2 tender locomotives, and the Dd class of 1946.
4-6-4-4. In Whyte notation, a 4-6-4-4 is a railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of four driving wheels and four trailing wheels. The sole example of this arrangement was the PRR Q1. This locomotive was essentially a prototype in the development of the PRR Q2, a 4-4-6-4.
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