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Sikorsky S-39

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American light amphibious aircraft

S-39
Sikorsky S-39 of the Civil Air Patrol, 1942
General information
Type	Flying boat
National origin	United States
Manufacturer	Sikorsky Aircraft
Number built	21
History
First flight	24 December 1929; 96 years ago (1929-12-24)

TheSikorsky S-39 is an American lightamphibious aircraft produced bySikorsky Aircraft during the early 1930s. The S-39 was a smaller, single-engine version of theS-38.^[1]

Operational history

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Spirit of Africa

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FilmmakersMartin and Osa Johnson used a giraffe-patterned S-39Spirit of Africa, with companion zebra-stripedS-38Osa's Ark, to explore Africa extensively, makingsafari movies and books.^[2]

Military usage

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One example of the S-39 was acquired by theUnited States Army Air Corps in 1932, given the designation Y1C-28. It was evaluated for use in coastal patrol and light transport roles; in 1934 it was redesignated C-28 and assigned as a liaison aircraft to theUnited States Military Academy.^[3]

At least one S-39 saw service with theCivil Air Patrol Coastal Patrol from 1942 to 1943. This was part of a fleet of civilian aircraft flown by volunteers along the Atlantic and Gulf Coasts, searching for both German submarines and for allied ships in distress. Seaplanes such as the S-39 were sometimes used for search and rescue if another aircraft crashed or went missing.^[4] A surviving CAP S-39, previously based atRehoboth Beach, Delaware, is currently on display at the New England Air Museum.

Yacht

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Edward A. Deeds had the yachtLotosland designed to incorporate aircraft capability. After loss of the planned aircraft on first loading Deeds ordered an S-39-A replacement the next day. The aircraft was intended to allow Deeds to quickly travel from his yacht to business and events ashore.^[5]^[6]^[7]

Variants

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S-39-A: 4-seat version^[8]
S-39-B: Improved 5-seat version of the S-39-A^[8]
S-39-C: Converted from S-39-B^[9]
C-28: One example of the S-39 acquired by theUnited States Army Air Corps

Surviving aircraft

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904 – S-39-B on static display at theNew England Air Museum inWindsor Locks, Connecticut.^[1]
Composite – S-39-C airworthy with atFantasy of Flight inPolk City, Florida.^[10]^[11] It was recovered from Alaska in 1965 and incorporated parts of five S-39s. It was restored by Dick Jackson and first flew in 2003.^[9]^[12]
920 – S-39-C under restoration with Frederick W. Patterson III ofAmerican Canyon, California. This is the last S-39 produced and was originally owned by Shell Eastern, the original name of the Shell Oil Company.^[13]^{[failed verification]}

Specifications (S-39A)

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Data from Aerofiles : Sikorsky,^[14] American flying boats and amphibious aircraft : an illustrated history^[15]

General characteristics

Crew: 1 or 2
Capacity: 4 or 5 pax / 1,145–1,300 lb (519–590 kg) payload
Length: 31 ft 11 in (9.73 m)
Wingspan: 52 ft 0 in (15.85 m)
Wing area: 320 sq ft (30 m²)
Airfoil: Sikorsky GS-1^[16]
Empty weight: 2,678 lb (1,215 kg)
Gross weight: 4,000 lb (1,814 kg)
Powerplant: 1 ×Pratt & Whitney R-985 Wasp Junior 9-cylinder air-cooled radial piston engine, 300 hp (220 kW)

Performance

Maximum speed: 115 mph (185 km/h, 100 kn)
Cruise speed: 97 mph (156 km/h, 84 kn)
Stall speed: 54 mph (87 km/h, 47 kn)
Range: 375 mi (604 km, 326 nmi)

References

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^^a ^b"Sikorsky S-39B "Jungle Gym"".New England Air Museum. Archived fromthe original on 21 September 2021. Retrieved21 September 2021.
^"Flying Expedition To Africa To Visit Forbidden Area."Popular Mechanics, April 1933.
^"Sikorsky Y1C-28."National Museum of the United States Air Force, June 24, 2009. Retrieved: July 15, 2017.
^Blazich, Frank A. Jr. (2020).An honorable place in American air power": Civil Air Patrol coastal patrol operations, 1942-1943(PDF).Air University Press. pp. 109–112.ISBN 978-1-58566-305-7. RetrievedSeptember 21, 2021.
^"The Diesel YachtLotosland".MotorBoating. February 1931. pp. 90–91. Retrieved23 October 2020.
^"Diesel YachtLotosland".Pacific Marine Review. San Francisco: J.S. Hines: 29. August 1929. Retrieved23 October 2020.
^"S38"(PDF).NEAM News. Windsor Locks, Ct.: New England Air Museum. Fall 1994. p. 4. Archived fromthe original(PDF) on 26 October 2020. Retrieved23 October 2020.
^^a ^b"A.T.C. #375"(PDF).Golden Wings Flying Museum. Retrieved7 August 2018.
^^a ^bJackson, Dick."40 Years and 40,000 Hours".Spirit of Igor. Richard Jackson. Retrieved7 August 2018.
^"1930 Sikorsky S-39".Fantasy of Flight. 17 September 2013. Retrieved7 August 2018.
^"FAA REGISTRY [N50V]".Federal Aviation Administration. U.S. Department of Transportation. Archived fromthe original on 7 August 2018. Retrieved7 August 2018.
^Jackson, Dick."40 Years and 40,000 Hours - Part 2".Spirit of Igor. Richard Jackson. Retrieved7 August 2018.
^"FAA REGISTRY [N58V]".Federal Aviation Administration. U.S. Department of Transportation. Archived fromthe original on 7 August 2018. Retrieved7 August 2018.
^Eckland, K.O."american airplanes: Sikorsky".aerofiles.com. Retrieved18 April 2019.
^Johnson, E.R. (2009).American flying boats and amphibious aircraft: an illustrated history. Jefferson, N.C.: McFarland & Co. pp. 188–189.ISBN 978-0-7864-3974-4.
^Lednicer, David."The Incomplete Guide to Airfoil Usage".m-selig.ae.illinois.edu. Retrieved16 April 2019.

External links

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Wikimedia Commons has media related toSikorsky S-39.

v t e Sikorsky aircraft
Fixed-wing aircraft (company designations)	S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 S-9 S-10 S-11 S-12 S-13 S-14 S-15 S-16 S-17 S-18 S-19 S-20 S-21 S-22/23/24/25/26/27 S-28 S-29-A S-30 S-31 S-32 S-33 S-34 S-35 S-36 S-37 S-38 S-39 S-40 S-41 S-42 S-43 VS-44 S-45
Fixed-wing aircraft (military designations)	C-6 C-28 JRS JR2S PS P2S RS XBLR-3 XPBS XSS XV-2
Helicopters (company designations)	VS-300 (S-46) S-47 S-48 S-49 S-50 S-51 S-52 S-53 S-54 S-55 S-56 S-57 S-58 S-59 S-60 S-61 S-61L/N S-61R S-62 S-63 S-64 S-65 S-66 S-67 S-68 S-69 S-70 S-71 S-72 S-73 S-74 S-75 S-76 S-80 S-92 S-95 S-97 S-100 S-102 S-103 S-300 S-333 S-434
Helicopters (military designations)	SH-3 Sea King HH-3E/F R-4 H-5 H-6 H-18 H-19 Chickasaw H-34 Choctaw CH-37 Mojave XH-39 HH-52A Seaguard CH-53 Sea Stallion CH-53E Super Stallion CH-53K King Stallion MH-53 CH-54 Tarhe UH-60 Black Hawk HH-60G Pave Hawk HH-60J/MH-60T MH-60R/S Seahawk SH-60B/F Seahawk H-60J/K VH-60 RAH-66 Comanche VH-92 Patriot CH-124 Sea King CH-148 Cyclone HLH
Experimental aircraft	Cypher/Cypher II Firefly Raider Raider X SB-1 X2 XBLR-3 XV-2

v t e United Statesmilitary transport aircraft designations, Army/Air Force andTri-Service systems
Army/Air Force sequence (1925–1962)	C-1 C-2 C-3 C-4 C-5 C-6 C-7 C-8 C-9 C-10 C-11 C-12 C-13¹ C-14 C-15 C-16 C-17 C-18 C-19 C-20 C-21 C-22 C-23 C-24 C-25 C-26 C-27 C-28 C-29 C-30 C-31 C-32 C-33 C-34 C-35 C-36 C-37 C-38 C-39 C-40 C-41 C-41A C-42 C-43 C-44 C-45 C-46 C-47 C-47F C-47T AC-47 C-48 C-49 C-50 C-51 C-52 C-53 C-54 C-55 C-56 C-57 C-58 C-59 C-60 C-61 C-62 C-63 C-64 C-65 C-66 C-67 C-68 C-69 C-70 C-70B C-71 C-72 C-73 C-74 C-75 C-76 C-77 C-77B–D C-78 C-79 C-80 C-81 C-82 C-83 C-83A C-83B C-84 C-85 C-86 C-87 C-88 C-89 C-90 C-91 C-92 C-93 C-94 C-95 C-96 C-97 KC-97 C-98 C-99 C-100 C-101 C-102 C-103 C-104 C-105 C-106 C-107 C-108 C-109 C-110 C-111 C-112 C-113 C-114 C-115 C-116 C-117 C-117D C-118 C-119 AC-119 C-120 C-121 C-121F EC-121 C-122 C-123 C-123A C-124 C-125 C-126 C-127² DHC C-127 Douglas C-127 C-128 C-129 C-130 C-130J AC-130 DC-130 EC-130/H HC-130 KC-130 LC-130 MC-130 WC-130 C-131 NC-131H C-132 C-133 C-134 C-135 KC-135 C-136 C-137² Boeing YC-137 DHC YC-137 C-137 C-138¹ C-139¹ C-140 C-141 C-142
Tri-service sequence (1962–present)	C-1 C-2 C-3 C-4 C-5 C-6 C-7² C-7 RC-7 C-8 C-9 C-10² C-10 KC-10 C-11 C-12 RC-12 C-13¹ C-14 C-15 C-16¹ C-17 C-18 C-19 C-20² C-20A–D C-20F–J C-21 C-22 C-23 C-24 C-25 C-26 C-27 C-27J C-28 C-29 C-30¹ C-31 C-32 C-33 C-34¹ C-35 C-36³ C-37 C-37B C-38 C-39¹ C-40 C-41 C-42¹ C-43¹ C-44¹ C-45 C-46
Revived original sequence (2005–present)	C-143 C-144 C-145 C-146 C-147
Non-sequential designations	C-767 C-880
Related designations	CT-39 CT-43 CV-2 CV-7
¹ Not assigned • ² Assigned to multiple types • ³ Unconfirmed

v t e Wright Field project numbers (1930–1934)
XP-900 XB-901 XP-902 XP-903 XP-904 905¹ XB-906 XB-907 XB-908 XC-909 XC-910 XO-911 XPT-912 XPT-913 XPT-914 XPT-915 916¹ XB-917 XC-918 919¹ XC-920 XB-921 922¹ XP-923 XO-924 XP-925 XO-926 XP-927 XC-928 XP-929 XPT-930 XPT-931 XO-932 XPT-933 XP-934 XBT-935 XP-936 XBT-937 XP-938 XO-939 XP-940 XC-941 XC-942 XPT-943 XP-944 XPT-945 946¹ 947¹ XP-948 949¹ XB-950
¹ Not assigned

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