EntityQ259458· pop 6S55Sign in to saveS55 may refer to:Article4 sectionsContentsAircraftAutomobilesRail and transitOther usesS55 may refer to:==Aircraft== Savoia-Marchetti S.55, an Italian flying boat Sikorsky S-55, an American helicopter Sukhoi S-55, a proposed Russian fighter aircraftRead full article (5 paragraphs)ConnectionsS-55EntityMercedes-Benz W220EntityCategoriesLetter–number combination disambiguation pages