Long hood

For other uses, seeHood.

ANorfolk SouthernEMD GP38-2operating long hood forward throughRidgewood, New Jersey.

Thelong hoodof ahood unit-stylediesel locomotiveis, as the name implies, the longer of the two hoods (narrower sections of the locomotive body in front and behind of the cab) on a locomotive, particularly American-type freight locomotives.

Equipment

The long hood normally contains thediesel engine(prime mover), the maingeneratororalternator,the locomotive's coolingradiators,thedynamic brakeresistor grids if fitted, and most of the locomotive's auxiliary equipment.Head-end powerequipment, if fitted, is normally in the long hood;steam generatorsfor heating olderpassenger carsmay be either in the long orshort hoods.

Operating direction

Normally, the long hood is the rear of the locomotive. For early hood unit models, this was not the case; railroads preferred to run with the long hood at the front and the cab at the rear (referred to as operatinglong hood forwardorLHF). It is a common misconception that locomotives were run LHF to provide greater protection, although it may have been a secondary benefit. Southern Railway and Norfolk and Western Railway operated their locomotives bidirectionally to make coal shifting more efficient. By putting the engineer on the right side with the Long Hood Forward, the engineer could see signals down the long hood and around theshort hoodfor operations in both directions.Later, preferences changed to having the short hood at the front and the long hood at the rear for better visibility and with the advent of Wide, orComfort, cabs.Visibility became a deciding factor when more powerful engines required larger, visibility-obscuring radiator units.

United States

The railroads that held out the longest for long-hood leading were theNorfolk and Western Railwayand theSouthern Railway(later merged into theNorfolk Southern Railway). When Southern Railway received their firstEMD GP7s,they were delivered with a high short hood, and Southern Railway pointed the locomotive LHF for crew safety. After the first GP7s hit the Southern Railway System, subsequent locomotives were ordered with the high short hood and the long hood designated (starting after the SD45 order) as the front. Here is a list of each locomotive Southern ordered with a high short hood, and operated LHF.

General Motors Electro-Motive Division

• GP7,
• GP9,
• GP18,
• GP38,
• GP38-2,
• EMD GP40
• GP40X(SOU 7000-7002),
• GP49(SOU 4600-4605),
• GP50(SOU 7003-7092),
• SD7,
• SD9,
• SD35,
• SD40,
• SD40-2,
• SD45

(note: theSD50and theGP59are the first units ordered with the low, short hood, and pointed LHF)

General Electric Transportation Systems

• B30-7,
• U23B,
• B23-7,
• U30C,
• U30B,
• U33C,

American Locomotive Company

• ALCO RS-11
• ALCO RSD-7
• ALCO RSD-12
• ALCO RSD-15

The Norfolk and Western Railway (NW) operated as Southern Railway did, with the long hood toward the front; the only difference between NW locomotives and Southern locomotives was the position of the bell. NW had the bell on the short hood while Southern had the bell on the long hood.

Many early diesel locomotive builders designated the long hood end of theirroad switchersas the front. Examples include models manufactured by theAmerican Locomotive CompanyandBaldwin Locomotive Works.

Long hood forward is a fading practice. Most modern locomotives produced in the USA feature wide-noseCanadian comfort cabswith desktop style controls, which bar the ability to operate the unit long hood forward because the desktop style prevents the engineer from turning in his or her chair to face the other end of the locomotive.

Great Britain

The term 'long hood forward' is not used in Britain, as the hood would be described as a "bonnet" or "engine compartment". Most British diesel locomotives have a cab at each end, so the term does not apply. Where a single-cab design was used, it was designed to be operated long hood forward, but, in practice, it might operate in either direction, like a steamtank locomotive.Apart fromshunters,the only single-cab class still in service in Britain is theclass 20.These are now usually operatedcab forward(often in pairs) to give the driver a better view of the track ahead, while some have been fitted with nose-mounted video cameras for use when working long hood forward.

Philippines

Philippine National Railwaysis operating long hood forward on their locomotives on passenger operations depending on what direction the locomotive is facing.

Indonesia

A CC 201 45 (CC 201 83 07) operating long hood forward with Argo Dwipangga train throughCikini Station.

PT Kereta Api Indonesiaformerly operated locomotives long hood forward for both passenger & freight operations. It now operates most trains short hood forward for safety reasons, but at least one train still runs long hood forward.

See also

• Short hood