Pennsylvania Railroad Class A1

Pennsylvania Railroad class A1 was a class of 0-4-0 type steam locomotives built for the Pennsylvania Railroad.

History[]

Built from 1886 to 1892, when the A1 was introduced into service, 0-4-0s were being used by other railroads just in time when the 0-6-0 came and other railroads neglected the 0-4-0.

But, on the Pennsylvania Railroad, this wasn't happening. This is because the PRR had a bunch of tight trackage and street trackage as well. The Pennsylvania Railroad elected to use a small locomotive to operate these tight and confined tracks.

By the 1920s the Pennsylvania Railroad class A1 was greatly replaced by the even larger class A5s, the largest 0-4-0s on the Pennsylvania Railroad's roster of 0-4-0s in service at the time. By the 1950s as the diesel switchers became available for easier and more efficient switching duties, the Pennsylvania Railroad started to replace the 0-4-0s and 0-6-0s notably the Pennsylvania Railroad class B6sb switchers with diesel switchers.

In 1957, as with all Pennsylvania Railroad steam locomotives still in service, they were completely replaced by the diesel locomotive. Shortly after they were scrapped.

Trivia[]

The Pennsylvania Railroad built 8 of the A1 class locomotives.

Locomotives of the Pennsylvania Railroad
A (0-4-0):	A1 • A2 • A3 • A4 • A5 • A6
B (0-6-0):	B1 (s) • B2 • B3 • B4 • B5 • B6 • B7 • B8 • B1 (e) • B28 • B29
C (0-8-0):	C1 • C29 • C30 • C31
D (4-4-0):	D1 • D2 • D3 • D4 • D5 • D6 • D7 • D8 • D9 • D10 • D11 • D12 • D13 • D14 • D15 • D16 • D17 • D18 • D19 • D20 • D21 • D22 • D23 • D24 • D25 • D26 • D27 • D27 • D28 • D28 • D29 • D30 • D31 • D32 • D33 • D34 • D35 • D36 • D37 • D38 • D39 • D61 • "Odd D" #10003
E (4-4-2):	E1 • E2 • E3 • E4 • E5 • E6 • E7 • E21 • E22 • E23 • E28 • de Glehn
F (2-6-0):	F1 • F2 • F3 • F21 • F22 • F23 • F24 • F25 • F26 • F27 • F30 • F31 • F61
G (4-6-0):	G1 • G2 • G3 • G4 • G5 • G53
H (2-8-0):	H1 • H2 • H3 • H4 • H5 • H6 • H7 • H8 • H9 • H10
I (2-10-0):	I1s
J (2-6-2 and 2-10-4):	J1 • J28
K (4-6-2):	K1 • K2 • K3 • K4 • K5 • K21s • K28s • K29s
L (2-8-2):	L1s • L2s • L5 • L6
M (4-8-2):	M1
N (2-10-2):	N1s • N2s
O (4-4-4):	O1
P (4-6-4):	P5
Q (4-6-4-4 and 4-4-6-4):	Q1 • Q2
R (4-8-4):	R1
S (6-4-4-6 and 6-8-6):	S1 • S2
T (4-4-4-4):	T1
Articulated steam locomotives:	CC1s • CC2s • HC1s • HH1 • HH1s • HH2s
Articulated electric locomotives:	AA1 • BB1 • BB2 • BB3 • DD1 • DD2 • FF1 • FF2 • GG1
Non-standard:	E2b • E3b • E3c • E44