S56 may refer to:
Aircraft
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Blériot-SPAD S.56
The Blériot-SPAD S.56 was a family of France, French airliners developed in the 1920s as various refinements of the Blériot-SPAD S.33, S.33 design. All S.56 versions shared two new features: the first was a newly designed, all-metal wing, repl ...
, a family of prototype French airliners
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Savoia-Marchetti S.56
The Savoia-Marchetti S.56 was an Italian single-engine biplane flying boat trainer and tourer, built by Savoia-Marchetti.
Of unequal span, the upper longer than the lower, Donald 1997, p.820. of wooden construction. Instructor and student sat s ...
, an Italian flying boat
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Sikorsky S-56, an American helicopter
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Sukhoi S-56, a proposed Russian carrier fighter
Other uses
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S56 (Long Island bus)
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S56 (New York City bus) serving Staten Island
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County Route S56 (Bergen County, New Jersey)
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Explorer S-56 (satellite)
Explorer S-56 was a NASA satellite launched on 4 December 1960, at 21:14 GMT as part of the Explorer program. The satellite was composed of a diameter inflatable sphere, and was intended to study the density of the upper atmosphere. The Scout ...
, a failed American spacecraft
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GER Class S56
The GER Class S56 was a class of steams designed by James Holden for the Great Eastern Railway. Together with some rebuilt examples of GER Class R24, they passed to the London and North Eastern Railway at the grouping in 1923, and received ...
, a British steam locomotive
* , a submarine of the Indian Navy
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Prince Skyline (S56), a Japanese automobile
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S56: Dispose of this material and its container at hazardous or special waste collection point, a safety phrase
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* Siemens S56, a
Siemens mobile phone
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