Baltimore and Ohio Class N-1
- Baltimore and Ohio Class N-1
Infobox Locomotive
name=B&O #5600 "George H. Emerson"
powertype=Steam
gauge=4 ft 8½ in (1435 mm)
caption=Baltimore and Ohio Railroad #5600 "George H. Emerson"
builder=Mt. Clare Shops
builddate=1931
whytetype=4-4-4-4
railroadclass=N-1
numinclass=1
roadnumber=5600
cylindercount=4 (duplex)
cylindersize=18 in × 26½ in (457 mm × 673 mm)
driversize=76 in (1.93 m)
boilerpressure=350 lbf/in² (2.41 MPa)
totalsurface=4,857 ft² (451 m²
superheaterarea=1,312 ft² (122 m²)
gratearea=80.5 ft² (7.48 m²)
fueltype=coal
tenderc
_coal,_22,000_US_gallons_(83,000_L)_water)
locotenderweight=736,500 lb (334,000 kg)
weightondrivers=238,000 lb (108,000 kg)
length=!117 ft 0¼ in (35.67 m)
railroad=Baltimore and Ohio Railroad
officialname="George H. Emerson"
The Baltimore and Ohio Railroad's sole Class N-1 steam locomotive, #5600 "George H. Emerson", was the first duplex locomotive and the first 4-4-4-4 locomotive ever built. It was designed and built by the railroad's own shops in 1937. The rear set of cylinders were placed beside the firebox. This allowed the locomotive's wheelbase to remain the same. The space beside the firebox was hot and dirty, which caused premature cylinder wear, and the placement of the cylinders limited the size of the firebox. These same problems occurred on the PRR Q1, which also placed the rear cylinders by the firebox.
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