The Pennsylvania Railroad's class B1 comprised 42 switcher-type

electric locomotive An electric locomotive is a locomotive powered by electricity from overhead lines, a third rail or on-board energy storage such as a battery or a supercapacitor. Locomotives with on-board fuelled prime movers, such as diesel engines or g ...

s built between

1926 Events January * January 3 – Theodoros Pangalos declares himself dictator in Greece. * January 8 **Abdul-Aziz ibn Saud is crowned King of Hejaz. ** Crown Prince Nguyễn Phúc Vĩnh Thuy ascends the throne, the last monarch of Viet ...

and 1935. They were of 0-6-0

wheel arrangement In rail transport, a wheel arrangement or wheel configuration is a system of classifying the way in which wheels are distributed under a locomotive. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and c ...

in the

Whyte notation Whyte notation is a classification method for steam locomotives, and some internal combustion locomotives and electric locomotives, by wheel arrangement. It was devised by Frederick Methvan Whyte, and came into use in the early twentieth cen ...

with 700 horsepower. As built, the first 28 locomotives in the 1926 order formed semi-permanently coupled

pairs Concentration, also known as Memory, Shinkei-suijaku (Japanese meaning "nervous breakdown"), Matching Pairs, Match Match, Match Up, Pelmanism, Pexeso or simply Pairs, is a card game in which all of the cards are laid face down on a surface and tw ...

grouped in three classes. The first, class BB1, were AC powered and served as prototypes. The second, class BB2, were DC powered and served in the New York Terminal district, specifically between

Sunnyside Yard Sunnyside Yard is a large coach yard, a railroad yard for passenger cars, in Sunnyside, Queens in New York City. Description The yard is owned by Amtrak and is also used by New Jersey Transit. The shared tracks of the Long Island Rail Road (LIR ...

and

New York Penn Station Pennsylvania Station, also known as New York Penn Station or simply Penn Station, is the main intercity railroad station in New York City and the busiest transportation facility in the Western Hemisphere, serving more than 600,000 passengers ...

. The third, class BB3, was AC powered and built for the Long Island Rail Road's electrified freight operation on the

Bay Ridge Branch The Bay Ridge Branch is a rail line owned by the Long Island Rail Road (LIRR) and operated by the New York and Atlantic Railway in New York City. It is the longest freight-only line of the LIRR, connecting the Montauk Branch and CSX Transporta ...

. In 1934 a follow-up order of 14 locomotives were built as single unit class B1 for the expanding main line AC electrification system. In addition to these new units all previous BB classes were split into single units and the BB2 class were re-powered for AC operation as that system replaced the old 650 V DC system in the New York terminal. At this point all 42 units were re-classed as PRR B1. Most of the B1 fleet spent its time shuttling trains around Sunnyside Yard or between there and Penn Station. Other B1s were assigned to the Penn Coach Yard at Philadelphia

30th Street Station 3 (three) is a number, numeral and digit. It is the natural number following 2 and preceding 4, and is the smallest odd prime number and the only prime preceding a square number. It has religious or cultural significance in many societie ...

and a few units even made their way to the PRR Harrisburg Station. As passenger traffic decreased in the 1950s and 1960s the need for dedicated electric switchers diminished with only the Sunnyside B1s surviving into the

Penn Central The Penn Central Transportation Company, commonly abbreviated to Penn Central, was an American class I railroad that operated from 1968 to 1976. Penn Central combined three traditional corporate rivals (the Pennsylvania, New York Central and the ...

era. After retirement all B1s were scrapped except for a single example preserved at the

Railroad Museum of Pennsylvania The Railroad Museum of Pennsylvania is a railroad museum in Strasburg, Lancaster County, Pennsylvania. The museum is located on the east side of Strasburg along Pennsylvania Route 741. It is administered by the Pennsylvania Historical and Mus ...

References

* * (simple drawing and specifications, for general reference by railroad staff). Co locomotives B1 11 kV AC locomotives Electric locomotives of the United States Railway locomotives introduced in 1926 Standard gauge locomotives of the United States Collection of the Railroad Museum of Pennsylvania {{US-rail-transport-stub Shunting locomotives