Experimental locomotives

The ' () or rail zeppelin' was a one-off experimental locomotive which resembled a Zeppelin airship in appearance. It was designed and developed by the German aircraft engineer Franz Kruckenberg in 1929. Propulsion was by means of a pusher propeller located at the rear: it accelerated the railcar to setting the land speed record for a petrol powered rail vehicle. Only a single example was ever built, which due to safety concerns remained out of service and was finally dismantled in 1939.

thumb|right|A remaining section of the Aérotrain track near Saran, Loiret, 2006

The Aerowagon or Aeromotowagon () was an experimental high-speed railcar fitted with an aircraft engine and propeller traction invented by Valerian Abakovsky, a Soviet engineer from Latvia. It produced speeds of up to . The Aerowagon was originally intended for the express transportation of important documents and to carry Soviet officials on government business.

thumb|Bombardier’s experimental JetTrain locomotive toured North America in an early-2000s attempt to raise the technology's public profile. The JetTrain was an experimental high-speed passenger train concept created by Bombardier Transportation in an attempt to make European-style high-speed service more financially appealing to passenger railways throughout North America. It was designed to use the same LRC-derived tilting car Acela trains that Bombardier built for Amtrak in the 1990s, which used all-electric locomotives. Unlike the Acela, powered electrically by overhead lines, the JetTrain

electric propeller-based suspension railway

uses a boiler and steam turbine as a power source

locomotive powered by jet engines

class of 26 American duplex 4-4-6-4 locomotives

Experimental jet-powered railcar

prototype Advanced Passenger Train tilting train unit

class of 1 American four-cylinder duplex 6-4-4-6 locomotive

locomotive class

locomotive class

German-built 3500hp diesel-hydraulic locomotives sold to USA and Brazil

class of 3 coal-fired steam-turbine-electric locomotives

prototype French diesel-hydraulic locomotive

Prototype dual cab steam locomotive

Canadian experimental diesel-hydraulic locomotive

Railway locomotive with piston engine

prototype 4000-hp diesel locomotive

class of 2 prototype French 4000hp C′C′ diesel-electric locomotives

prototype British gas-turbine locomotive

prototype British gas turbine locomotive