|National origin||United States|
|Primary user||Pan American Airways|
|Developed from||Sikorsky S-34|
|Developed into||Sikorsky S-38|
The Sikorsky S-36 was an eight-seat amphibian sesquiplane designed and built by the Sikorsky Manufacturing Company in the late 1920s. The aircraft was ordered by Pan American Airways, the start of a long association with Sikorsky flying boats.
The S-36 was a modified and larger version of the earlier S-34 and was designed as a commercial aircraft for six passengers or freight. It was an amphibian sesquiplane with a boat hull fuselage and retractable landing gear. It was powered by two Wright Whirlwind J-5 engines and had a crew of two and room for six passengers on two facing bench seats. Only six aircraft were built.
One aircraft named Dawn was sold to Mrs. Francis Grayson, a wealthy divorcee, for an attempt to be the first woman to fly across the Atlantic. As a passenger in Dawn and after two false starts, Grayson, with Brice Herbert Goldsborough (navigator), Oskar Omdal and Fred Koehler (passenger) departed in the aircraft for the Atlantic attempt on 23 December 1927 but was not seen again. The weather was poor. The aircraft passed Cape Cod at 8 am, headed for Harbour Grace, Newfoundland. The last message from the aircraft before it disappeared was received by a radio station on Sable Island off the coast of Canada, consisting of the words "something's wrong here" with the aircraft's callsign. This resulted in the first-ever air relief expedition, including two destroyers and the dirigible USS Los Angeles. A message in a bottle was found on January 29, 1929; it read "1928, we are freezing. Gas leaked out. We are drifting off Grand Banks. Grayson." The aircraft and its occupants were never found.
- Production aircraft, five built.
- Evaluation aircraft with Wright J-5 engines for the United States Navy as the XPS-1, one built.
- One S-36B for evaluation by the United States Navy
Specifications (S-36 production version)
Data from 
- Crew: two
- Capacity: six passengers
- Length: 34 ft 0 in (10.36 m)
- Wingspan: 62 ft 0 in (18.9 m)
- Height: 12 ft 0 in (3.66 m)
- Wing area: 585 ft2 (54.35 m2)
- Empty weight: 3950 lb (1792 kg)
- Gross weight: 6000 lb (2722 kg)
- Powerplant: 2 × Wright Whirlwind radial engine, 200 hp (149 kW) each
- Maximum speed: 120 mph (193 km/h)
- Service ceiling: 15,000 ft (4572 m)
- Rate of climb: 600 ft/min (3.05 m/s)
- Best, Martin (2003). "Sikorsky American Fixed-Wing Aircraft, Part 2: Sikorsky S-36 to S-38". Air-Britain Archive. 2003 (1): 31. ISSN 0262-4923.
- The Illustrated Encyclopedia of Aircraft (Part Work 1982–1985). Orbis Publishing.
- "The Sikorsky S.36.B Amphibian: An Interesting Flying-Boat of Unusual Design". Flight. XIX (42): 738–739. October 20, 1927. Retrieved October 11, 2012. A contemporary technical article on the S-36.
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