1923: (Igor I) Sikorsky Aero Engr Corp. 1925: Sikorsky Mfg Co, Bridgeport CT (company funded in part by composer-pianist Sergei Rachmaninoff). 1926: Leased former L-W-F plant, College Point, Long Island NY. 1928: Sikorsky Aviation Div, United Aircraft & Transport Corp, Bridgeport. 1939: (Chance) Vought-Sikorsky Div, United Aircraft Corp. 1943: Sikorsky Aircraft Div, United Aircraft Corp. 1975: Sikorsky Aircraft Div, United Technologies Corp, Stratford CT. 199?: Sikorsky Aircraft Corp, United Technologies Corp
and to Jos Heyman for straightening out the military helo clutter)
AH-60 SEE H-60.
BLR-3 - 1937 bomber design project; cancelled, none built.
Sikorsky C-6 (USAAF)
Sikorsky C-6A [30-400] (Ron Dupas coll)
C-6, C-6A 1929 = 12pChwAm; two P&W R-1340-7; span: 71'6" length: 40'3" v: 112. Data similar to S-38A. POP: a single 12p S-38A was procured by the USAAC for evaluation as C-6 [29-406], also as Wright Field s/n XP-588eventually the ship, which had a length of 41'0", was used as a VIP aircraft. This was followed by 10 C-6A production aircraft [30-397/406], used mainly for transport duties and target towing.
C-28 SEE S-39-B.
CH-3 SEE H-3.
CH-53 SEE H-53.
CH-60, EH-60 SEE H-60.
Sikorsky CH-148 (Sikorsky Co)
CH-148 Cyclone (Canada) est: 2008 - H-92 variant as replacement for Sea King. Contracts for 28 maritime helicopters in Nov 2004.
Guardian 1927 = Twin-engine bomber joint project with Consolidated for Army evaluation. Test model, as Consolidated-Sikorsky Guardian, built by Sikorsky revealed major structural flaws in initial testing and the project was canceled.
H-3 (Model S-61) - Multiservice use, derived from S-61B. CH rg; two GE T58-GE-8C/F turboshafts; six-blade main rotor: 62'0" length: 54'9" v: 160/133/0 range: 625 ceiling: 10,800'. Water-tight boat hull. USN version HSS-2. The H-3 designation was applied to various versions of the S-61 basic design, including S-61B, -61D, -61F, and -61R. Service names include Jolly Green Giant, Seaking, and Pelican, depending on the user service. Built under license by United Aircraft in Canada as CHSS-2 and CH-124, broadly similar to SH-3A, also by Agusta (Italy), Mitsubishi (Japan), and Westland (UK).
CH-3B 1962 = USAF support helicopter for "Texas Tower" radar platforms. POP: 6 [62-12574/12576], plus 3 upgraded from SH-3A [62-12571/12573]. One later transferred to USN. (Until 1990, the Library of the USAF Museum erroneously filed details of these aircraft under the H-38 designation.)
H-4 SEE R-4.
H-5 SEE R-5.
H-6 SEE R-6.
H-7 - Cancelled development of XR-6.
Sikorsky H-18 [49-2889] (Sikorsky)
Sikorsky H-18 Turbine version [49-2890]
H-18 1945 = First US Army helicopter, based on commercial S-52. 4pCH; 245hp Franklin O-425-1; rotor: 33'0" length: 28'10" load: 1050# v: 100/92/0 range: 358 ceiling: 15,800'. Quad landing gear. POP: 4 as YH-18A [49-2888/2891], of which 2 converted as XH-39/-39A test-beds.
H-19 Chickasaw - 12pCH, USAF version of S-55. Quad landing gear; engine located in the nose. Became armed after 1950 tests at Ft Rucker. MATS Air Rescue versions designated SH-19B became HH-19B. USN versions HO4S, HRS. 547 license-built by Mitsubishi, Sud Aviation, and Westland.
Sikorsky YH-19 [49-2012] (USAF)
H-34 Choctaw - Similar to civil S-58 with 1425hp Lycoming-Wright R-1820-84. Originally designed for anti-sub patrol as USN XHSS-1; ff: 3/8/54.
H-34A, CH-34A 1954 = 20p or 2p + 8 litters. Data same as S-58A. POP: initial order of 10 after evaluation of XHSS-1; subsequent production orders totalled 427 [53-4475/4554, 54-882/937, -2860/2914, -2995/3050, 55-5241/5261, 56-4284/4342, 57-1684/1770, 58-1721] included 21 transfers from USN. Redesignated as CH-34A in 1962. In addition to redesignated ships, 21 H-34As were rebuilt as CH-34C.JH-34A 19?? = POP: 1 [53-4475].H-34B, CH-34B 1960 = H-34A conversion. POP: unk. Redesignated as CH-34B in 1962.
H-37 Mojave - US Army heavy transport version of S-56 with similar specs.
YH-37A 1953 = Ex-USMC XHR2S-1 for testing; ff: 8/18/53.
H-38-SI - Sikorsky's mystery plane, believed by historians to have been a helicopter of unknown design that was supplied to a foreign power, and wore USAF s/n [54-4047].
Sikorsky H-39 [49-2890] (Sikorsky)
H-39 1954 = US Army's evaluative conversion of H-18 to turbine power. 4pCH rg; 400hp Turbomèca XT51-T3; rotor: 35'0" length (fuselage): 41'0" (?>30'3") load: 1256# v: 146/138/0 range: 280 ceiling: 17,900'; ff: 6/1/54. Unarmed test-bed with four-blade rotor, inward- and forward-retracting gear. POP: 2 as XH-39A and XH-39 [49-2890/2891 respectively]. World helicopter speed record of 156mph on 8/26/54 (p: Bill Wester), soon after also set a world's helo altitude record of 24,521'. Civil counterpart was S-59.
Sikorsky HH-52A (Ken Freeze)
H-52 Seaguard 1962 = USCG SAR version of S-62 with similar specs. Originally ordered on 6/21/62 as HU2S-1G. POP: 99 as HH-52A [1352/1379, 1382/1413, 1415/1429, 1439/1450, 1455/1466].
H-53 - Multi-service 3-40pCH; two and three 2850hp GE T64-GE-3 turboshafts with 72'3" six-blade rotor (except H-53E) and tail rotor from S-64; length: 67'2" v: 170/x/0 range: 257. Watertight hull. S-80 was export "international" version.
Sikorsky CH-53 (USMC)
Sikorsky CH-54 (US Army / KYNG)
H-54 Tarhe - US Army version based on S-60.
CH-54A 1962 = Two P&W T73-P-1; rotor: 72'0" length: 88'6" v: 126/x/0; ff: 5/9/62. POP: 6 preproduction as YCH-54A [64-14202/14207] ([64-4256] probably is a cancelled order) and 54 production [66-18408/18413, 67-18414/18431, 68-18432/18459].
H-59 SEE S-69.
H-60 (Model S-70) - Multiservice utility CH with two 1560hp GE T700-700 in most UH-60s, and 1690hp T700-401 in most SH-60s, and other engines as specifically mentioned; four-blade main rotor: 53'8" length: 64'10" v: 190/160/0 ceiling: 19,300'. Export sales to Australia, Bahrain, Brunei, China, Colombia, Egypt, Greece, Israel, Japan, Jordan, Mexico, Morocco, People's Republic of China, The Philippines, Saudi Arabia, South Korea, Spain, and Turkey.
CH-60 19?? = USN version of UH-60L.Sikorsky SH-60 (Sikorsky Corp)EH-60A, YEH-60A Black Hawk, Quick Fix II 1981 = US Army communications intelligence. UH-60A conversions; ff: 9/24/81. POP: 1 prototype as YEH-60A [79-23301] and ?? production [84-24017/24028, 85-24465/24482, 86-24561/24578, 87-24657/24674].
Boeing-Sikorsky YRAH-66 Prototype (Boeing)
H-66, RAH-66 Comanche (Boeing-Sikorsky) 1996 - Army attack and recon/observation gunship to replace AH-1 and OH-58. 2pCH; two 1432# T800-LHTEC-801 turboshafts, five-blade rotor; rotor: 39'0" length: 43'3" v: 201/190/0 range: 300 ceiling: 14,980'; ff: 1/4/96. Tandem cockpits, anti-torque fan-tail; radar fire-control. c.$13m unit cost in 1995; POP: 2 prototypes by Sikorsky (Bridgeport CT) as YRAH-66 for flight testing through 2003 [94-0327, 95-0001]. Contract for scheduled production canceled on 2/23/04.
H-76 - Reputedly Sikorsky Co paper designation for S-76.
H-92 19?? = USAF strategic airlift and supply. 22pCH; rotor: 56'4" width: 17'3" length: 56'2" v: 174/151/0 range: 547. Loadable with folding rotor and tail pylon into a C-5 or C-17. 10000# external cargo hook.
HH-3 SEE H-3.
HH-53 SEE H-53.
HH-60 SEE H-60.
Sikorsky HJS (USN)
HJS (Model S-53) 1947 = USN version of S-53; 525hp Continental R-975-34; rotor: 49'0" v: 110/x/0; ff: 8/22/47. POP: 2 as XHJS-1 [30368, 30370].
HNS 1941 = USN version of VS-316A Hoverfly; 180hp Warner R-550-3; rotor: 38'0" length: 35'5" v: 77/x/0. POP: 3 YR-4Bs and 22 R-4Bs transferred from USAAF as HNS-1 [39033/39052, 46445, 46699/46700, 75727/75728]. SEE ALSO H-4.
HO2S 1945 = USN version of S-51 Dragonfly; 450hp P&W R-985-AN-5; rotor: 48'0" length: 41'10' v: 93/x/0. POP: 2 YR-5A transferred from USAAF as HO2S-1 [75689/75690], then in 1946 they were handed over to USCG as HO2S-1G.
HO3S 1946 = Similar to USAF R-5F; P&W R-985-AN-5; rotor: 49'0" length: 41'1", v: 105/x/0. POP: 92 as HO3S-1 [57995/57998, 122508/122529, 122709/122728, 123118/123143, 124334/124353], of which 9 transferred to USCG [1230/1238].
HO4S 195? = USN from S-55; P&W R-1340-57; rotor: 53'3" length: 42'1" v: 115/x/0. POP: 10 as HO4S-1 [125506/125515].
HO4S-2 - Projected version for USCG was not proceeded with.
Sikorsky HO5S-1 Civil mod [N8003E] (Eddie Coates)
HO5S 194? = USN version of S-52-2. 4pCH; Franklin O-425-1; rotor: 33'0" length: 28'4" v: 100/x/0. POP: 79 as HO5S-1 [125516/125527, 126696/126705, 128601/128620, 130101/130137], and 8 as HO5S-1G to USCG [1244/1251].
HOS 194? = USN version of VS-316B Hoverfly; Franklin O-405-9; rotor: 38'0" length: 38'3" v: 105/x/0. POP: 3 XR-6As transferred from USAAF to USN as XHOS-1 [46446/46448] followed by 38 Nash-Kelvinator-built R-6A transferred as HOS-1 [75589/75624 and 75729/75730], 27 of which were later were handed over to USCG as HOS-1G.
Sikorsky XHR2S-1 Prototype (Sikorsky Corp)
HR2S 1953 = USMC heavy transport version of S-56; two P&W R-2800-54; rotor: 72'0" length: 64'3" v: 130/x/0; ff: 12/18/53. POP: 4 prototypes as XHR2S-1 [133732/133735] and 55 production HR2S-1 [138418/138424, 140314/140325, 141603/141617, 145855/145875]. Redesignated as CH-37C in 1962.
HR3S - USMC assault helicopter project, as XHR3S-1, in competition with Boeing-Vertol HRB. Only a mock-up was built, but the design evolved into CH-3C and civil S-61R.
HRS 1953 = USN transport helicopter version of S-55; P&W R-1340-57; rotor: 53'3" length: 42'1" v: 115/x/0. First production as HRS-1, POP: 60 [127783/127842].
HRS-2 19?? = Minor equipment changes. POP: 101 [129017/129049, 130138/130205], of which several were converted to HRS-3 standards. Redesignated as CH-19E in 1962.
HSS Seabat - USN anti-submarine helicopter based on S-58; Wright R-1820-84; rotor: 56'0" length: 46'9" v: 123/x/0.
XHSS-1 1954 = Prototype; ff: 3/8/54. POP: 3 [134668/134670]; later redesignated as YHSS-1. Redesignated as YSH-34G in 1962.
HU2S, HH-52A 1958 = USCG version of S-62 with General Electric T58-GE-8; rotor: 53'0" length: 44'7" v: 109 mph; ff: 5/14/58. Ordered on 6/21/62 as HU2S-1G, but redesignated as HH-52A on 9/18/62 before delivery. POP: 99 #151; SEE H-52.
HUS 1955 = USMC/USCG utility helo version of S-58 with Wright R-1820-84; rotor: 56'0" length: 46'8" v: 123/x/0. POP: 470 to USMC as HUS-1 [143961/143983, 144630/144654, 145713/145812, 147147/147201, 148053/148122, 148753/148822, 149318/149402, 150195/150264, 150552/150580, 150691, 150717/150729]. Production continued as redesignated UH-34D after 9/18/62.
HUS-1A 195? - Amphibious gear. POP: 8 built [144655/144662] and 32 converted from HUS-1. Redesignated as UH-34F in 1962.
JR2S 19?? = Three VS-44 Excalibur passenger flying boats for American Export Airlines were completed as XJR2S-1 for the Navy, but flown by AEA under contract; span: 124'0" length: 76'2" v: 227. Civil regs [NC41880/41882] were allocated, as well as USN s/ns [12390/12392] ([04396/04398] were cancelled and possibly refer to the same aircraft). The designation JR2S-2 was used as an alternative.
Sikorsky JRS-1  (William T Larkins) + [?] (USN)
JRS 1940 = USN version of S-43. ChwMAm; two P&W R-1690-23; span: 86'0" length: 52'1" v: 185 ceiling: 20,700'. POP: 17 as JRS-1 [0504/0506, 1054/1063, 1191/1194]. USAAF version as OA-8 and -11.
MH-53 SEE H-53.
MH-60 SEE H-60.
Sikorsky Y1OA-8 (USAAF)
OA-8, -10, -11 1937 = Military use of S-43 for personnel and cargo. 2-12pChwMAm; two 750hp P&W R-1690-23 Hornets; span: 86'0" length: 52'1" v: 185 ceiling: 20,700' (specs similar to S-43). POP: 5 as Y1OA-8 [37-370/-374] and 1 as OA-11 VIP transport [42-01]. USN version JRS.
Sikorsky XP2S-1 [A8642] (USN via W T Larkins coll)
P2S 1932 = 4pOBFb; two 400hp P&W R-985A (?>550hp R-1340) tandem pusher/tractor in interwing nacelle; span: 56'0" length: 44'1" v: 1270 ceiling: 13,900'. POP: 1 as XP2S-1 [A8642].
Sikorsky XPBS-1  (US Navy)
PBS (Model S-44) 1937 = ChwMFb; four 1200hp P&W Wasps. Essentially USN version of S-36; span: 124'0" length 76'2" v: 227/x/64 range: 4030 ceiling: 20,800'; ff: 8/23/37. POP: 1 as XPBS-1 , sank in San Francisco Bay in 1942. Major elements of design went into VS-44A.
PS - USN patrol, based on S-36 and -38. 3-4pO/CswBAm.
Sikorsky XPS-1 [A-8005] (USN via Dan Shumaker coll)
R-4 (Model S-47) - US Army version of Vought-Sikorsky VS-316A. To USCG as HNS, to RAF/RNAS as Hoverfly I.
Sikorsky XR-4 [41-18874] (Sikorsky Corp)
R-5, H-5, Hoverfly I (Model S-48, S-51) - US Army general-purpose version of Vought-Sikorsky VS-327. Redesignated as H-5 in 1948.
XR-5, -5A 1943 = 4pCH; ff: 8/18/43. POP: 5 [43-28236/28239, -47954], of which 2 were fitted with British equipment and redesignated as XR-5A.
R-6, Hoverfly II (Model S-49) - From Vought-Sikorsky VS-316B. Redesignated as H-6 in 1948, to USN as HOS.
XR-6 1943 = 225hp Lycoming O-435-7; ff: 10/15/43. POP: 1 prototype [43-47955].
R-7 - Cancelled development of XR-6A.
RH-3 SEE H-3.
RH-53 SEE H-53.
RS - USN and USMC utility transport. 6pO/CswBAm; two 450hp P&W R-1340.
RS-1 1933 = S-41 purchased by USN in 1930 for evaluation; span: 78'9" length: 45'2" v: 131. POP: 3 [A8842/8844].
RSRA SEE S-72.
Sikorsky S-29-A Original with Hisso and bold markings, and rebuild with Liberty  (Aviation)
Sikorsky S-29-A  (1000aircraftphotos.com)
S-29-A 1924 = 16pO/CB; two 400hp Liberty 12; span: 69'0" length: 49'10" load: 4225# v: 115/100/56 ceiling: 12,300'; ff: 5/4/24. Igor Sikorsky. First Sikorsky built in the US, originally had 220hp Hispano-Suizas, but was repowered with Liberty 12s in rebuild after damage in a forced landing . The suffix "-A" denoted "Made in America," as 28 previous S-numbers were all built and utilized in Russia. An historic machine, it was owned by Roscoe Turner and made many long-distance flights in the East and Midwest 1925-27, was even used to deliver two grand pianos. Sold to Howard Hughes' film company in 1928 and appeared as the German Gotha-type bomber in "Hell's Angels" 1930, where it was destroyed in the filmed crash.
S-30 1925 - 10pCB; two 200hp Wright J-4; load: 1800# v: 100 range: 500. Data are from an advertisement; the airplane was never built.
Sikorsky S-31 (David Hatfield coll)
Sikorsky S-31 (Skyways)
S-31 1925 = 3pOswB; 200hp Wright J-4; span: (upper) 45'0" (lower) 32'0" length: 26'0" load: 1200# v: 124/110/35 range: 500± ceiling: 15,000'. Company's first commercial order was from Fairchild Co, at the time not in the airplane business, for aerial surveying. POP: 1. One publicity photo shows it with a machine-gunner in rear cockpit, suggesting plans for a military export version.
Sikorsky S-32 (Frank Rezich coll)
Sikorsky S-32 on floats (Skyways)
S-32 1926 = 5pOswB; 400hp Liberty 12; span: (upper) 58'4" (lower) 38'0" length: 36'0" load: 2100# v: 133/x/40 ceiling: 16,000'. Three cockpits. POP: 1 for a Canadian mining company for use in South American exploration; mounted on floats at one time.
S-33, -33A Messenger 1925 = 1pOswB; 60-70hp Anzani and Lawrence; span: (upper) 32'0" (lower) 20'0" load: 400# v: 115/90/35 ceiling: 15,000'. POP: 1 S-33 and 1 S-33A racer for Al Krapish.
Sikorsky S-34 [X883] (Sikorsky Corp)
S-34 1926 = 7pOhwMFb; two 200hp Wright J-4; span: (upper) 50'5" (sponsons) 12'0" length: 34'0" load: 1600# v: 111/90/52 range: 360 ceiling: 15,000'. Engines were mounted above the parasol wing. POP: 1 [X883], crash-landed at sea and sank in Nov 1927 after experiencing motor trouble during a test flight.
S-35 1926 = 4pCswB; three 420hp Gnôme-Rhône Jupiter (originally had two motors); span: (upper) 101'0" (lower) 76'0" load: 15,710# ceiling: 16,800'; ff: 8/23/26. Original span, before extra bays were added: 76'0"; original load: 6600#. Estimated v: (3 motors) 160/140/59 (2 motors) 135/115/59. POP: 1 built for René Fonck's transatlantic attempt; a twin refitted with three motors at Fonck's request. Overloaded, it crashed on take-off 9/21/26 and burned.
Sikorsky S-36 (Leo Opdyke via Skyways)
S-36 1927 (ATC 2-275) = CswBAm/Fb version of S-34 with various seating arrangements, powerplants (usually two 200hp Wright J-4) and specifications; spans: 56'0"- 72'0" (latter span for the long-range version) length: 34'0" load: 2000-2500# v: 120/x/47 ceiling: 16,000'. Sikorsky's first amphibian (or as the oft-seen alternate spelling "amphibion"). POP: 5; [NX1282, 3001 (temporary, cancelled), X3699, 4567] and 1 to USN as XPS-1 [A8005].
Sikorsky S-37-1 AIA in Lima Perú [R1283] (Sergio de la Puente coll)
S-37-1 Guardian 1927 = 20pO/CswB; two 520hp Gnôme-Rhône Jupiter; span: (upper) 100'0" (lower) 58'0" length: 44'0" load: 7000# v: 135/115/57. $15,955; POP: 1 for René Fonck as [X1283] Ville de Paris, but his planned flight to Europe was cancelled; ship was sold in 1929 to American International Airways and reregistered [R1283]. Modified as 16p with 525hp P&W Hornet (the Jupiters went to S-37-B) for service in South America; scrapped by PAA in 1930.
Sikorsky S-37-2 [NR942M] (Frank Rezich coll)
Sikorsky S-38-A [NC5933] (Peter Bowers coll)
Sikorsky S-38-A [NC8019] (Sikorsky Archives)
S-38-A, -B, -C 1928 (ATC 60) = 10-12pCswBAm; two 400hp P&W Wasp; span: (upper) 71'8" (lower) 36'0" length: 40'3" load: 4480# v: 125/103/57 range: 500-700 ceiling: 18,000'. Once was described as "a collection of spare parts flying in formation." POP: 11 [NC8000, NC8005, NC8019/8022, NC8043/8044] 10p prototype [NC5933], subsequent production for airline service, with one special luxury model as a personal transport for John H Whitney [NC8005], 1 to AAF as XC-6, 2 to USN as XPS-2 [A8089/8090].
S-38-AH 1928 (ATC 2-36) = 525hp P&W Hornet A.
Sikorsky S-39-A Paul Mantz at 1939 Worlds Fair, Treasure Island [NC804W] (William T Larkins)
S-39, S-39-A 1929 (ATC 340) = 4-5pChwMAm; 300hp P&W Wasp Jr; span: 52'0" length: 31'11" load: 1145-1300# v: 115/97/54 range: 375 ceiling: 18,000'. $17,500; POP: 13 [NC42V, NC802Y, NC803W/809W, X813M=X963M, NC887W], of which the prototype S-39 [X813M] was experimentally converted with two 115hp Cirrus Hermes Mk I [X963M]; crashed during testing.
Sikorsky S-39-B [NC55V] (Frank Rezich coll)
Sikorsky S-40 (Pan American)
Sikorsky S-40 under construction (Sikorsky Corp)
S-40 1931 (ATC 454) = 44pChwMAm/Fb; four 575hp P&W R-1690 Hornet; span: 114'0" length: 76'8" load: 9252# v: 130/108/65 range: 500-875 ceiling: 13,000'. Hull length 48'0"; ff: 8/31/31 (p: Boris Sergievsky, S Gluhareff) (data from flight report by M Gluhareff, observer). Twin-boom, twin-tail; parasol wing. First of the Pan American Clippers, and world's largest amphibian at the timea wing float alone was as large as a sport flying boat hull and, with its maze of struts, it was nicknamed "The Flying Forest". Seaplane version had 11,000# load, slightly higher speed. $139,000; POP: 3 [NC80V/81V, NC752V], c/ns 2000/2002. ALSO SEE The PAA Flying Clippers.
S-40-A 1935 (ATC 562) = Conversion of PAA S-40 to four 660hp P&W supercharged Hornets; load: 10,813# v: 140/120/65 range: 900. POP: 3 conversions.
S-41-A, -B, -C 1931 (ATC 418, 2-286) = 18pChwMAm; two 575hp P&W Hornet B; span: 78'9" length: 45'2" load: 5700# v: 133/115/66 range: 575-900 ceiling: 13,500'. $62,500; POP: 6. 2 S-41-Bs had modifications as 13p under (2-286) [NC41V, NC60V], 1 converted to S-41-C [NC784Y], 3 to USN as RS-1.
Sikorsky S-42 (Pan American)
S-42, Clipper 1934 (ATC 544) = 37pChwMFb; four 750hp P&W Hornet; span: 114'2" length: 67'8" load: 18,236# v: 188/165/65 range: 1200; ff: 3/29/34. Parasol wing; four passenger compartments. First of the long-distance clipper-type flying boats proved its worth by establishing a new world load-carrying altitude record in lifting a 16,608# load to over 16,000' on 4/26/34 (the mark to beat was 6,561') (p: Boris Sergievsky, Raymond Quick), then increasing this record to 20,407' less than a month later. $197,892; POP: 3 [NC822M/824M] to PAA as Clippers.
Sikorsky S-42-B [NC16734] (William T Larkins)
Sikorsky S-43 Harold Vanderbilt 1938 flying yacht [NC16925] (William T Larkins)
Sikorsky S-43-B [X16927] (Frank Rezich coll)
S-43, -43-A, -B, -H 1935 (ATC 593) = 16-25pChwMAm/Fb; two 750hp P&W Hornet; span: 86'0" length: 51'2" load: 6750# v: 194/167/65 range: 775 ceiling: 17,500'; ff: 6/5/35 (p: Boris Sergievsky). POP: 22 S-43 [NC15061/15068, NC16925, NC16928, NC16934, NC20698], 1 S-43-A, 3 S-43-B [NC16926/16927, NC16931/16933], 1 S-43-H [R440]; 5 to Army as OA-8 and 1, an impressed civil model in 1941, as OA-11; 17 to USN as JRS-1. S-43-H went to Howard Hughes for a proposed 1938 world flight; crashed at Lake Mead NV in 1943, repaired and stored at Hughes Tool Co in Houston TX until 1977, then sold to Van Kregten Enterprises of San Jose CA for planned museum display.
S-43-W, -WB 1937 (ATC 623) = 19-25pChwMAm/Fb; two 760hp Wright Cyclone; span: 86'0" length: 52'3" load: 6040# v: 186/177/65 range: 775. POP: 4 [NC16929/16930, PKAFT, PKAFU]. S-43-WB was flying boat conversion.
S-44 SEE PBS.
S-45 - Proposed six-engine flying boat for Pan Am. Never built.
S-46 SEE VS-300.
S-47 Hoverfly 19?? = HNS-1, R-4, VS-316.
S-48 SEE R-5.
S-49 SEE R-6.
S-50 - No data.
S-51 (TC H-2) 1946 = 4pCH; 450hp P&W Wasp; rotor: 48'0" length: 57'1" load: 1250# v: 103/85/0 range: 260; ff: 2/16/46. Three-blade main rotor. World's first commercial helicopter, inaugurated Philadelphia's Helicopter Air Transport service. Modified from a military design for the civil market as shuttle, cropduster, surveyor, etc. Prototype for S-53. To USAF as R-5F, and USN as HO3S-1. Licensed production in Great Britain as Westland-Sikorsky Dragonfly (with 520hp Alvis).
Sikorsky S-52 Civil prototype (Sikorsky Corp)
Sikorsky H-18 [49-2889] (Sikorsky Corp)
S-52 1946 = 2-3pCH; 175hp Franklin O-425; rotor: 49'0" length: 28'10" load: 650# v: 110/87/0 ceiling: 14,000'. Known as the S-52-1, development began in late 1945 with a first flight in 1946. Slightly modified to carry four passsengers, four S-52-2s were ordered by the US Army as YH-18A [49-2888/2891] and first flew in July 1950. [49-2890] was later converted as XH-39A and [49-2891] was converted as XH-39. Set world speed and altitude records in 1948.
S-53 1947 = Modified S-51 with 525hp Continental R-975-34, tricycle gear, small tail rotor pylon, and a tailplane; ff: 8/22/47. POP: 2 [30368, 30370]. To USN as XHJS-1.
Sikorsky S-54 (Sikorsky Corp)
S-54 1948 = USAF R-4B modified to the 'sesqui-tandem' configuration once tested on the VS-300, with an open observer's seat added aft of the main rotor. The resulting S-54 was first flown on 12/20/48 and logged about 4.5 hours flying time before being abandoned in early 1949, probably when work started on the S-55.
Sikorsky conceived this model to study the twin-rotor configuration, which he ultimately abandoned since he considered that at cruising speed the tail rotor did not absorb any more power than that lost becaue of rotor interference with twin rotors. ( Robert Conner 9/9/01)
Sikorsky S-55 (Sikorsky Corp via Ron Dupas)
S-55 1953 = Passenger and cargo transport. 12pCH; 600hp P&W R-1340-S1H2; three-blade main rotor: 53'0" length: 42'3" load: 2250# v: 101/85/0 range: 440; ff: 11/10/49. First commercial passenger helicopter, inaugurating New York Airways on 7/8/53. To Army/AF as H-19, USN/USCG as HO4S, USMC as HRS Seabat. Licensed production in Great Britain as Westland Whirlwind, and in France by Sud-Est as Elephant Joyeux.
S-55-GW 19?? = 700hp Wright R-1300.
S-56 19?? = Passenger and cargo transport. 36pCH; two 2100hp P&W R-2800; five-blade main rotor: 72'0" length: 60'0" v: 130/115/0. Set speed record of 162.64mph on 11/11/56 (p: R L Anderson). To Army as H-37, USMC as HR2S.
S-57 - Proposed single-blade, stowing-rotor delta-wing. Not built.
S-58A 1955 = Passenger and cargo transport. 12-20pCH; 1275hp Wright C-989HE-2; four-blade main rotor: 56'0" length: 46'9" load: 5370# v: 123/98/0 ceiling (hover) 4,000'; ff (as USN XHSS-1): 3/x/54. Set three world helicopter speed records in 1958 at 141.9mph (100k course), 136mph (500k), and 132.6mph (1000k). POP: unk as S-58A. POP total all S-58s to 1970: 2,261.
S-58B 1956 = 1525hp Wright R-1820-84; load: 5150# v: 130/101/0 range: 247 ceiling: 9,500. Army as H-34, USN as HSS, USMC as HUS.
Sikorsky S-59/H-18 [49-2890]
S-59 c.1950 = Turbine-powered S-52/H-18 [49-2890], redesignated as H-39 (qv).
Sikorsky S-60 (Sikorsky Corp)
S-60 Skycrane 19?? = Concept demonstrator, a modification of S-56. POP: 1. Displayed for many years at New England Air Museum (CT), believed destroyed in a tornado that hit the museum.
S-61 - Civil, multi-service, and export CH. Became H-3.
S-61A 1959 = Generally similar to SH-3A. POP: 9 to Royal Danish Air Force, 1 to a civil operator.S-61A-4 Nuri 19?? = Export version of SH-3A for Malayasia. POP: 38.S-61F, NH-3A 1965 = US Army/USN; SH-3A with stub wings and two P&W J60 turbojets. Achieved speed of 242 mph. Flown with both five- and six-blade rotors. Fuselage used as ejection system test-bed for S-72 RSRA.
Sikorsky S-62 (Sikorsky Corp)
S-62 1958 = 10pCH rg; 1250hp GE T-58-8B turboshaft; three-blade rotor: 53'0" length: 44'7" v: 175/x/0 range: 412 ceiling: 11,200'. S-55 rotor system on an amphibious fuselage. Served with USCG, as HH-52A, and some civil operators. Also built under license in Japan by Mitsubishi.
S-62A 19?? = Commercial version.
S-63 1958 = S-62 with S-58 rotor system, originally designated S-62B.
S-64 Skycrane 1962 = Heavy-lift Skycrane helicopter powered by two P&W JTFD12-4A turboshafts; six-blade main rotor: 72'0" v: 109/x/0 range: 230 ceiling: 9,000'; 5/9/62. Set five helicopter altitude and three time-to-climb records in 1971-72. Army version CH-54.
S-64E 196? = Civil version of CH-54A. Capable of lifting cargo weighing up to 20,000#.
S-65 1964 = CH hybrid with a scaled-up fuselage based on S-61R, and its rotor, transmission system, and other dynamic components from S-64. POP: 1 commercial demonstrator, later sold to NASA. Military version H-53.
Sikorsky S-65A (Sikorsky Corp)
S-66 - Proposed AAFS gunship, similar to S-67. Not built.
Sikorsky S-67 (Sikorsky Corp)
Sikorsky S-67 Ordnance load (Sikorsky Corp)
S-67 Blackhawk 1970 = 2pCH rg; two GE T58-GE-5 turboshafts; five-blade main rotor: 62'0" length: 74'4" v: 193/x/0 ceiling: 17,000'; ff: 8/20/70. S-61 rotor system and engines with new gunship fuselage and 27'4" wings. Proposed to US Army as AH-3. Set world 3-5km helicopter speed record of 216.84 mph on 12/14/70 (p: Byron Graham), and 15-25km speed record of 220.89 mph on 12/19/70 (p: Kurt Cannon). Equipped for a time with a fan-in-fin anti-torque device for US Army tests. Destroyed in a crash at 1974 Farnborough air show. POP: 1.
S-68 - Proposed Super S-58T. Not built.
Sikorsky S-69 [73-21942] (Sikorsky Corp)
S-69, H-59 -59B 1973 = Advancing Blade Concept demonstrator with P&W-Canada PT6T-3 Turbo Twin-Pac and two P&W J60 turbojets; two stacked, contrarotating 36' rotors. As a pure helicopter, achieved 184 mph level flight speed, 221 mph in a dive; with auxiliary propulsion, achieved 274mph (?>322mph) in level flight. POP: 2 to Army as YH-59A [73-21941/21942], later to NASA. XH-59B with PT6T-3 and shrouded fan proposed, but never built.
It is alleged that one XH-59A was ordered with s/n [71-1472] but there is no photographic evidence of this aircraft, and the serial does not fit in the 1971 fiscal year. The YH-59A had two additional P&W J60-P-3As, and two aircraft were built [73-21941/21942]. The first flew on 7/26/73, but crashed on 8/24/73. The second aircraft, which was allegedly rebuilt from [71-1472], flew on 7/21/75, and in Mar 1977 the two J60s were installed for forward flight. It (or the XH-59A) was to be converted with two T700-GE-700s, contrarotating rotors, and a tail-mounted pusher prop. This project, which was designated XH-59B, was not proceeded with. ( Jos Heyman 1/11/02)
Sikorsky S-70 (Sikorsky Corp)
S-70 198? = 8-11p executive transport. ALSO SEE H-60.
S-70A 1988 = Export Army H-60s as civil designation S-70A-1 to -30 and C-1 to -6. A-1 to Saudi Arabia, A-5 to Philippines, A-9 to RAAF, A-11 to Jordan, A-12 to Japan, A-14 to Brunei, A-16 to Westland, A-17 to Turkey, A-18 to Korea, A-21 to Egypt [88-26121/26122], A-22 to Korea, A-24 to Mexico, A-25/-26 to Morocco, 27 to Hong Kong, A-28 to Turkey, A-29 to Brunei, A-30 to Argentina, C-1 to ROCAF, C-2 to PRC, C-5 to Brunei, C-6 to Colombia.
S-71 - Proposal for AAH (won by Hughes AH-64) based upon S-70 rotor system. Not built.
Sikorsky S-72 (NASA)
S-72, RSRA 1976 = Rotor Systems Research Aircraft built under NASA contract; two GE T58-GE-5 turboshafts; five-blade rotor: 62'0" length: 70'7" load: 3900-5178# v: (helo) 184/160/0 (compound) 361/230/x ceiling: 10,000'. H-3/S-61 rotor system and engines on new fuselage similar to S-67. Crew seated on seats with rocket extraction system (the blades would be blown off at the start of ejection sequence). Could be flown with wings and two GE TF-34s. Was flown in all combinations, even with no tail rotor (NOTAR). POP: 2, with 1 modified as X-wing demonstrator.
S-73 - Army Advanced Armored Reconnaissance Vehicle, proposal only.
S-74 - Original designation of S-76.
Sikorsky S-75 (Sikorsky Corp)
S-75 1984 = 2-8pCH with S-76A rotor system and engines on a new carbon-fiber fuselage; two 650hp Allison 250-C30S turboshafts; rotor: 44'0" length: 43'8" load: 2050# v: 159/184/0 range: 398 ceiling: 13,500'; ff: 7/x/84. POP: 2 demonstators built under an Army contract.
S-76, H-76 19?? = H-76 is thought to be Sikorsky's own "militarizing" of this model, perhaps for clandestine sales. Original designation was S-74.
S-76A 1977 = 14pCH with two 650hp Allison 250-C30; main rotor: 44'0" v: 178/167/0. Set nine speed and two time-to-climb records, and one altitude record in two weight classes over a five-day period in Feb 1982. POP: 284.S-76A+ 1987 = Medical. Retrofitted with two 681hp Turbomèca Arriel 1S. POP: 17.Sikorsky S-76B Shadow [N765SA] (Sikorsky Corp)
S-78 - Project version of S-70 (H-60) with an enlarged cabin. Not built.
S-80 see H-53E.
Sikorsky S-92 (Sikorsky Corp)
S-92 Superhawk 1998 = S-70 growth rotor on a new 19-22p fuselage. CH rg; two GE 1450hp CT7-6D turboshafts with four-blade 56'4" rotors; width: 17'3" length: 56'10" v: 178/160/0 range: 575. Flotation gear for over-water ops. Awarded 2002 Collier Trophy.
SH-3 SEE H-3.
SH-19 SEE H-19.
SH-60 SEE H-60.
Sikorsky XSS-2  (USN via Freidrich Huggler)
Sikorsky XSS-2  (USN)
SS (Model X1200) 1933 = Scout-observation experiment for carrier duty. 2pChwMAm; 550hp P&W R-1340D; span: 42'0" length: 32'0" v: 159 ceiling: 22,600'. Attractive gull-wing design with pylon-mounted engine nacelle. POP: 1 , originally XSS-1, then modified as XSS-2.
Sikorsky Standard [X802W] (Frank Rezich coll)
Sikorsky Standard [X802W]
Standard J-1 with Sikorsky wing [NC6703] (Leo Opdyke coll)
Standard c.1930 = 2-3pOhwM. Standard J-1 rebuilt with Sikorsky high-lift parasol wing. [NC6703, X/NX802W, et al]. [X802W] with a Stearman-built fuselage.
UH-3 SEE H-3.
UH-60 SEE H-60.
Sikorsky UN-4 [C2044]
UN-4 1927 (ATC 2-23) = 2pOhwM; 90hp Curtiss OX-5. Modified Curtiss JN-4D fuselage with a Sikorsky-Gluhareff high-lift wing. [C2044, 5469, et al]. Wing adapted for other types, as wellTravel Air, Standard, etc.
V-2 1953 - Design study based on S-57; none was built.
VH-3 SEE H-3.
VH-60 SEE H-60.
Vought-Sikorsky VS-44A Wartime paint [NC41881] (Joe Juptner coll)
VS-44A (Vought-Sikorsky) 1942 (752) = 35pChwMFb; four 1050hp R-1830 Twin Wasp; span: 124'0" length: 79'3" load: 27,300# v: 210/175/67 range: 4900 ceiling: 16,600'. Michael Gluhareff. Developed from USN Sikorsky XPBS-1. POP: 3 Excalibur [NC41880], Excambian [NC41881], and Exeter [NC41882]. Excalibur crashed in Newfoundland in Oct 1944. Excambian ended up in Catalina Island (CA) service 1957, then as Antilles Air Boats, retired in 1969 and was donated to the Naval Air Museum at Pensacola FL, finally to New England Air Museum (CT) after rebuild by Sikorsky volunteers. Exeter crashed in Uruguay in Aug 1947.
Sikorsky VS-300 First flight (clip: Popular Science)
Sikorsky VS-300 on tether [NX28996] (Sikorsky Corp)
Sikorsky VS-316 [NX28996] (Sikorsky via Clark Scott coll)
VS-300, -316 (Vought-Sikorsky) 1939 = 1pOH; 75hp Franklin with 28'0" three-blade rotor, single tail rotorlater, after a wind-induced crash, two small horizontal tail rotors were added on outriggers; quad-gear. The first successful US helicopter used a Sikorsky-patented single-rotor design of 1931, and had 18 major modifications times during it brief lifespan; ff: (tethered) 8/14/39, (untethered) 11/x/39 (?>5/13/40). POP: 1 [NX28996]. Although the Breguet-Dorand Gyroplane and the Focke-Achgelis Fa.61 were the first helicopters to take-off and land vertically, and hover and fly in any direction, they were essentially experiments. It was VS-300 that paved the way for production models capable of carrying useful loads. Unlike in Europe, Sikorsky/United Aircraft had a secure industrial base for massive development and production.
Sikorsky VS-300A [NX28996] (Sikorsky Corp)
Vought-Sikorsky XF5U-1 (Vought Corp)
VS-315, F5U (Vought-Sikorsky) 1942 = 1pC circular-wing; two 1350hp P&W R-2000-7; span: 32'0" length: 27'10". Used four-blade F4U props. POP: 1 as XF5U-1. Charles H Zimmerman, based on his V-173 concept; nicknamed "Flying Flapjack." Project cancelled in 1947 by the Navy, then favoring development of jets, and was scrapped.
Sikorsky VS-316A (Sikorsky Corp)
VS-316 (Vought-Sikorsky) 1941 = Initial production (as VS-316A Hoverfly with 180hp Warner R-550) in 1942 for US Army as XR-/YR-4
VS-327 SEE R-5, S-48