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  2. Pennsylvania Railroad Q2 class - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Railroad_Q2_class

    The Pennsylvania Railroad 's class Q2 comprised one prototype and twenty-five production duplex steam locomotives of 4-4-6-4 wheel arrangement built between 1944 and 1945. [1][3][4][2] They were the largest non- articulated locomotives ever built and the most powerful locomotives ever static tested, producing 7,987 cylinder horsepower (5,956 kW ...

  3. Thermoplastic-sheathed cable - Wikipedia

    en.wikipedia.org/wiki/Thermoplastic-sheathed_cable

    Black: 6 or 8 AWG wire (13.3 mm 2 or 8.37 mm 2) for 60- and 45-amp circuits, respectively Grey: usage for underground installations, designated as "underground feeder" (UF) cables [4] The outer jacket is labeled with letters that show how many insulated wires are concealed within the sheath. This does not include the uninsulated ground wire.

  4. 4-4-6-4 - Wikipedia

    en.wikipedia.org/wiki/4-4-6-4

    4-4-6-4. A 4-4-6-4, in the Whyte notation for the classification of steam locomotives by wheel arrangement, is one that has four leading wheels followed by four coupled driving wheels, a second set of six coupled driving wheels and four trailing wheels. The Pennsylvania Railroad 's Q2 class were the only locomotives ever to use this arrangement.

  5. 4-6-4+4-6-4 - Wikipedia

    en.wikipedia.org/wiki/4-6-4+4-6-4

    4-6-4+4-6-4. Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-6-4+4-6-4 is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-6-4 locomotives operating back to back, with the boiler and cab suspended between the two engine units. Each engine unit has two pairs of leading ...

  6. Pennsylvania Railroad E6 class - Wikipedia

    en.wikipedia.org/wiki/Pennsylvania_Railroad_E6_class

    PRR 460 on display, remainder scrapped. Class E6 on the Pennsylvania Railroad was the final type of 4-4-2 "Atlantic" locomotive built by the railroad, and second only to the Milwaukee Road 's streamlined class A in size, speed and power. Although quickly ceding top-flight trains to the larger K4s Pacifics, the E6 remained a popular locomotive ...

  7. 4-4-6-2 - Wikipedia

    en.wikipedia.org/wiki/4-4-6-2

    4-4-6-2. AT&SF locomotive no. 1300, a 4-4-6-2 Mallet type. Under the Whyte notation for the classification of steam locomotive wheel arrangements, a 4-4-6-2 is a locomotive with two pairs of leading wheels, one set of four driving wheels, a second set of six driving wheels, and a pair of trailing wheels. The equivalent UIC classification is ...

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