S55 may refer to:
Aircraft
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Savoia-Marchetti S.55
The Savoia-Marchetti S.55 was a double-hulled flying boat produced in Italy, beginning in 1924. Shortly after its introduction, it began setting records for speed, payload, altitude and range.
Design and development
The S.55 featured many in ...
, an Italian flying boat
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Sikorsky S-55, an American helicopter
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Sukhoi S-55, a proposed Russian fighter aircraft
Automobiles
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BMW S55, an automobile engine
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Mercedes-Benz S 55 AMG, a luxury car
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Mercury S-55, an American full-size car
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Shorland S55, a British armoured personnel carrier
Rail and transit
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S55 (New York City bus) serving Staten Island
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S55 (St. Gallen S-Bahn), a former S-Bahn line in Thurgau, Switzerland
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S55 (ZVV), a former line of the Zürich S-Bahn
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FGC line S55, a suburban train line in Catalonia, Spain
Other uses
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S55 (star) in the constellation Sagittarius
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Ariel 1, a British satellite
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County Route S55 (Bergen County, New Jersey)
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Explorer S-55 (satellite)
Explorer S-55 was an American satellite launched by NASA on 30 June 1961, as part of the Explorer program. Explorer S-55, was launched using a Scout X-1 launch vehicle from the Wallops Flight Facility (WFF). Its mission was to evaluate the ...
, a failed American spacecraft
* , a submarine of the Indian Navy
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Siemens S55, a mobile phone
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Wandandian language
{{Letter-Number Combination Disambiguation