draisine

A draisine () is a light auxiliary rail vehicle, driven by service personnel, equipped to transport crew and material necessary for the maintenance of railway infrastructure.

The eponymous term is derived from the German inventor Baron Karl Drais, who invented his '' Laufmaschine'' (German for "running machine") in 1817, which was called ''Draisine'' in German (''vélocipède'' or ''draisienne'' in French) by the press. It is the first reliable claim for a practically used precursor to the bicycle, basically the first commercially successful two-wheeled, steerable, human-propelled machine, nicknamed hobby-horse or dandy horse.

Later, the name draisine came to be applied only to the invention used on rails and was extended to similar vehicles, even when not human-powered. Because of their low weight and small size, they can be put on and taken off the rails at any place, allowing trains to pass.

In the United States, motor-powered draisines are known as speeders while human-powered ones are referred as handcars. Vehicles that can be driven on both the highway and the rail line are called road–rail vehicles, or (after a trademark) Hy-Rails.

Dressin, velorail, trolley, or railbike

"Draisines", called ''dressin'' in Swedish, ''dresin'' in Norwegian, ''dræsine'' in Danish, and ''resiina'' in Finnish, refers to pedal-powered rail-cycles which were used by railroad maintenance workers in Finland, Sweden, and Norway until about 1950, as handcars were elsewhere.

Draisines nowadays are used for recreation on several unused railway lines in Germany, Sweden, Norway, Poland, some other European countries and South Korea. Several companies rent draisines in Sweden. In the United States, railbike tours have operated in several states nationwide: California, Maine, Oregon, the Adirondack Mountains of upstate New York, and Delaware.

Until 2007, Finland hosted an annual competition, ''Resiina-ralli'' (''Draisine Rally''), involving several draisine teams travelling for many days on the railways from one corner of the country to another.

Types

Image:Drezyna 442.jpg, Hand-lever draisine handcar
File:Dresina.jpg,
Image:Draisine outdoor exhibition Metelen.jpg, Functioning draisine
Image:Three-wheelDraisineSRM.jpg, Three-wheeled draisine at the Saskatchewan Railway Museum exhibited by a railway history museum in Metelen, Germany
Image:Tricicle combined railway bike combined pedal and hand driven Khabarovsk Russia museum of Amur bridge.jpg, Combined pedal and hand driven railway bike in museum of Khabarovsk Bridge, Russia
Image:RailVelocipede.jpg, Three-wheeled handcar designed to be operated by a single person, widely known in the United States as a handcar or velocipede
Image:Schienenfahrrad.JPG, Pedaled four-wheel rail-cycle draisine
Image:HotchkissBikeRR.JPG, Purpose-built bicycle for riding the Hotchkiss Bicycle Railroad
File:Draisines in Broby, 2009-09-02.jpg, A row of draisines for hire: The railway runs between Broby and Glimminge, Sweden
Image:USFSRailcarWilliams5171.JPG, Speeders is another term for a small motorized draisine.
Image:Speeder-Draisine-SMR.jpg, Motorized draisines are known as speeders, trolleys, or “jiggers” in the United States and Canada
Image:Draisine Namibia.jpg, Draisine for crew transport and railway track inspection in Namibia 2017
Image:Rail bus01.jpg, Even this small railbus is related to the draisine

Automotive draisines

File:StateLibQld 2 164431 Jeep shunting empty coal hoppers, Brisbane.jpg, Jeep shunting empty coal hoppers, World War II
File:France Paris Champs Elysees Dodge.JPG, And the "Big jeep" (or "Beep"), the WWII Dodge WC model, was also used for draisine duty
Image:GAZ-13 Chaika draisine.jpg, Car (Russian GAZ-13 Chaika) converted into a railroad speeder, at the Hungarian Railway Museum
Image:VW T1-BD 20-5031.JPG, ''Deutsche Bundesbahn'' railroad speeder based on the Volkswagen Type 2

Military use

The military use of draisines concerned, first of all, armoured draisines. They were light armoured rail motor vehicles, intended for reconnaissance, scouting, track patrolling, and other auxiliary combat tasks, usually belonging to armoured trains. Early vehicles of this kind were built in Russia during World War I. Later, often armoured cars were used as armoured draisines, after exchanging their wheels to railroad ones, or fitting them with additional retractable railroad rollers. Some countries, however, manufactured purpose-built armoured draisines between the wars, such as the USSR and Czechoslovakia. Peculiar vehicles were Polish armoured draisines - they were tanks or tankettes fitted with special rail chassis, able to be used on rails or on the ground, leaving the rail chassis on the rails. Some countries developed railtrack armoured draisines, with retractable tracks railroad wheels; they were not widely used, however. Different armoured draisines were used during the Second World War, starting from the invasion of Poland by Nazi Germany.

Prior to World War II, the Japanese Empire had already made extensive use of draisines such as the Sumida M.2593 in the Japanese invasion of Manchuria and the Sino-Japanese War. From 1952, the Wikham Armoured Trolley was used by British security forces during the Malayan Emergency.

Construction

People have been putting bicycles on railroad tracks ever since there have been both bicycles and railroads. From time to time, factory-built models have been available, beginning with a device marketed in 1908 through the Sears catalogue for just US$5.45 ().

There are many designs of draisine. However, certain fundamentals of railbike design must be adhered to, foremost among them the reconciliation of a bicycle's stability with adaptation to riding on a railway track: bicycles are kept upright by the rider steering in the direction of an impending fall, but this ability is sacrificed when the bicycle is constrained by rails. Simply adding flanged wheels to a conventional bicycle would make it impossible to balance, so the typical approach to stabilization is to add an outrigger, with roller(s), across to the second rail from near the bicycle’s rear wheel. Even such an outrigger system is not without its complications, as tracks that are no longer perfectly parallel — common on sections of abandoned track — can result in derailment. Additional guide rollers can help alleviate this problem at the expense of greater weight.

See also

* Balance bicycle
* Handcar
* History of the bicycle
* Human-powered land vehicle
* Norry, improvised draisines used in Cambodia
* In the film ''Frog Dreaming'' (1986), the young protagonist builds and uses a railbike.
* Railbus
* Railroad speeder
* Railway Mokes
* Taiwanese push car railways

References

External links

Railriders
Video produced by Oregon Field Guide

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