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UTC is in the process of acquiring Schweizer , and will merge it with Sikorsky. The product lines of the two firms are complementary, and have very little overlap, as Sikorsky primarily concentrates on large helicopters, and Schweizer concentrates on small helicopters, UAVs, gliders, and light planes. The Schweizer deal was signed on August 26, 20042004 is a leap year starting on Thursday (the link is to a full 2004 calendar), and has also been designated the: International Year of Rice International Year to Commemorate the Struggle against Slavery and its Abolition Elections are to be held in 73 co, exactly one week to the day after the death of Paul Schweizer , the company's founder and majority owner.

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Sikorsky designates nearly all of its models with S-numbers; numbers S-1 through S-20 were designed by Igor Sikorsky in Russia. Later models, especially helicopters, received multiple designations by the military services using them, often depending on purpose (UH, SH, and MH for instance), even if the physical craft had only minor variations in equipment. In some cases, the aircraft were returned to Sikorsky or to another manufacturer and additionally modified, resulting in still further variants on the same basic model number.

• Sikorsky S-29-AThe Sikorsky S-29-A was an all-metal, twin-engine biplane airliner, first flown in 1924. It was the first aircraft aviation pioneer Igor Sikorsky built after coming to the United States, hence the special "-A" suffix signifying "America". The pilot and me
• Sikorsky S-30
• Sikorsky S-31
• Sikorsky S-32
• Sikorsky S-33
• Sikorsky S-34
• Sikorsky S-35
• Sikorsky S-36 - 8-seat two-engine flying boat
• Sikorsky S-38The Sikorsky S-38 was sometimes called "The Explorer's Air Yacht". Indeed, the S-38 was Sikorsky's first widely produced flying boat which in addition to serving successfully for Pan American World Airways and the U. Army, also had numerous private owners - 8-seat two-engine flying boat (1928)
• Sikorsky S-39 - five-seat single-engine variant of S-38
• Sikorsky S-40 - successful 28-passenger flying boat (1931)
• Sikorsky S-41
• Sikorsky S-42The Sikorsky S-42 was the first real transoceanic flying boat. Flying for Pan American World Airways, a total of ten aircraft were built, manufactured by the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation in Stratford, Connecticut. - four-engine flying boat
• Sikorsky S-43 - two-engine version of S-41
• Sikorsky S-52 - helicopter with all-metal rotors (1947)
• Sikorsky S-55 - utility helicopter (1949)
• Sikorsky S-56 - twin-engined helicopter, H-37A Mojave (1953)
• Sikorsky S-58 - improved S-55 (1954)
• Sikorsky S-60 - prototype "flying crane" helicopter, crashed 1961 (1959)
• Sikorsky S-61 - ASW helicopter, many variants including HH-3 "Jolly Green Giant" (1959)
• Sikorsky S-62 - HH-52 Seaguard amphibious helicopter (1958)
• Sikorsky S-64 - CH-54 Tarhe "flying crane" (1962)
• Sikorsky S-65 - CH-53 Sea Stallion, CH-53E Super Stallion heavy lift helicopters (1964, 1974)
• Sikorsky S-67 - prototype attack helicopter (1970)
• Sikorsky S-69 - prototype with counterrotating props, no tail (1972?)
• Sikorsky S-70 - UH-60 Black Hawk, SH-60 Sea Hawk (1974)
• Sikorsky S-72 - rotor systems research for NASA (1987)
• Sikorsky S-76 Spirit - 14-seat commercial (1977)
• Sikorsky S-92 and military Sikorsky H-92

• Sikorsky Cypher - Doughnut-shaped UAV (1992)
• Sikorsky Cypher II - development of above (2001)