Sikorsky Aircraft S-48 / S-51 (R-5, H-5, WS-51 & Dragonfly)

Light Utility Helicopter

Westland WS-51 Dragonfly HR Mk.5, Royal Navy, WG719, c/n WA/H/50 © Karsten Palt
Photo ©: Karsten Palt
The Sikorsky S-48 & S-51 is a light 4-seat single-engine utility helicopter built by the American manufacturer Sikorsky Aircraft. The S-48 military variants were YR-5, R-5A and R-5D. S-51 military versions were R-5F / H-5F, H-5G, H-5H (USAF) and HO3S-1/-1G operated by the US Navy and US Coast Guard.
The S-51 was basically a commercial variant of the S-48, later also used for military service. The total production of 444 S-48 & S-51 helicopters include 65 S-48, 220 S-51 built by Sikorsky and 159 WS-51 built in license in England by Westland (WS-51 and Dragonfly). A further development is the Westland WS-51A Widgeon, with enlarged cabin and the rotor system of the Westland Whirlwind.
Crew1
Passengers3
Propulsion1 Radial Engine
Engine ModelPratt & Whitney R-985-AN-5 Wasp Junior
Engine Power336 kW450 hp
max. Cruise Speed167 km/h90 kts
  104 mph
Speed198 km/h107 kts
  123 mph
Service Ceiling4.511 m14.800 ft
Rate of climb610 m/min2000 ft/min
Range452 km244 NM
281 mi.
Empty Weight1.837 kg4.050 lbs
max. Takeoff Weight2.495 kg5.500 lbs
Rotor Blades (main/tail)3/3
Main Rotor Diameter14,63 m47 ft 12 in
Tail Rotor Diameter2,44 m8 ft 0 in
Rotor Disc Area175,3 m1887 ft
Length (Fuselage)12,45 m40 ft 10 in
Length17,40 m57 ft 1 in
Height3,90 m12 ft 10 in
First Flight18.08.1943
Production Statusout of production
Total Production444
ICAO CodeS51
FAA TCDSH-2
Data for (Version)Sikorsky S-51 (commercial)
VariantsS-48 (XR-5, YR-5A, R-5A, R-5D), S-51 (R-5F, H-5F, H-5G, H-5H, HO3S-1, HO3S-1G), WS-51, Dragonfly

[Photo-ID: 6686] Karsten Palt 2013-05-17
Westland Dragonfly HR.3 (WS-51), Royal Navy, WP495, c/n WA/H/80, Karsten Palt, 2013Westland
Dragonfly HR.3 (WS-51)
Royal Navy
Reg.: WP495
c/n: WA/H/80
 
displayed in BEA c/s as G-AJOV
Royal Air Force Museum Cosford [Shifnal, Shropshire]
[Photo-ID: 7028] Karsten Palt 2013-05-18
Westland Dragonfly HR.5 (WS-51), Royal Navy, WH991, c/n WA/H/67, Karsten Palt, 2013Westland
Dragonfly HR.5 (WS-51)
Royal Navy
Reg.: WH991
c/n: WA/H/67
 
Yorkshire Air Museum [Elvington]
[Photo-ID: 960] Karsten Palt 2008-06-21
Westland Dragonfly HR5 (WS-51), Royal Netherlands AF / Koninklijke Luchtmacht, 8-1, c/n WA/H/62, Karsten Palt, 2008Westland
Dragonfly HR5 (WS-51)
Royal Netherlands AF / Koninklijke Luchtmacht
Reg.: 8-1
c/n: WA/H/62
 
ex WG752
Nationaal Luchtvaart-Themapark Aviodrome [Lelystad (EHLE / LEY)]
[Photo-ID: 7551] Karsten Palt 2013-07-19
Sikorsky H-5 Dragonfly, Royal Canadian Air Force, 9601, c/n 5118, Karsten Palt, 2013Sikorsky
H-5 Dragonfly
Royal Canadian Air Force
Reg.: 9601
c/n: 5118
 
Canadian Warplane Heritage Museum [Hamilton, Mount Hope]
[Photo-ID: 7552] Karsten Palt 2013-07-19
Sikorsky H-5 Dragonfly, Royal Canadian Air Force, 9601, c/n 5118, Karsten Palt, 2013Sikorsky
H-5 Dragonfly
Royal Canadian Air Force
Reg.: 9601
c/n: 5118
 
Canadian Warplane Heritage Museum [Hamilton, Mount Hope]
[Photo-ID: 11192] Karsten Palt 2015-06-03
Sikorsky H-5 Dragonfly, United States Air Force (USAF), 48-0548, c/n , Karsten Palt, 2015Sikorsky
H-5 Dragonfly
United States Air Force (USAF)
Reg.: 48-0548
 
ex N9845Z
Pima Air and Space Museum [Tucson, AZ]
[Photo-ID: 6441] Karsten Palt 2013-02-09
Sikorsky H-5A (S-51), Royal Thai Air Force (RTAF), H1K-1/96, c/n , Karsten Palt, 2013Sikorsky
H-5A (S-51)
Royal Thai Air Force (RTAF)
Reg.: H1K-1/96
 
Royal Thai Air Force Museum [Bangkok]
[Photo-ID: 6442] Karsten Palt 2013-02-09
Sikorsky H-5A (S-51), Royal Thai Air Force (RTAF), H1K-1/96, c/n , Karsten Palt, 2013Sikorsky
H-5A (S-51)
Royal Thai Air Force (RTAF)
Reg.: H1K-1/96
 
Royal Thai Air Force Museum [Bangkok]
[Photo-ID: 5580] Karsten Palt 2012-04-29
Sikorsky H-5H (S-51), United States Air Force (USAF), 49-2007, c/n 51-197, Karsten Palt, 2012Sikorsky
H-5H (S-51)
United States Air Force (USAF)
Reg.: 49-2007
c/n: 51-197
 
The War Memorial of Korea [Seoul]
[Photo-ID: 11196] Karsten Palt 2015-06-03
Sikorsky HO3S-1 Dragonfly, United States Coast Guard, 232, c/n 51-232, Karsten Palt, 2015Sikorsky
HO3S-1 Dragonfly
United States Coast Guard
Reg.: 232
c/n: 51-232
 
ex N4925E
Pima Air and Space Museum [Tucson, AZ]
[Photo-ID: 1090] Karsten Palt 2008-07-11
Westland WS-51 Dragonfly HR Mk.5, Royal Navy , WG719, c/n WA/H/50, Karsten Palt, 2008Westland
WS-51 Dragonfly HR Mk.5
Royal Navy
Reg.: WG719
c/n: WA/H/50
 
The Helicopter Museum [Weston-super-Mare]
[Photo-ID: 6492] Karsten Palt 2013-02-09
Westland WS-51 Dragonfly Mk.1A, Royal Thai Air Force (RTAF), H1-4/96, c/n WA/H/120, Karsten Palt, 2013Westland
WS-51 Dragonfly Mk.1A
Royal Thai Air Force (RTAF)
Reg.: H1-4/96
c/n: WA/H/120
 
Royal Thai Air Force Museum [Bangkok]
[Photo-ID: 5524] Karsten Palt 2012-01-11
Sikorsky YH-5A Dragonfly, United States Air Force (USAF), 43-46620, c/n 164, Karsten Palt, 2012Sikorsky
YH-5A Dragonfly
United States Air Force (USAF)
Reg.: 43-46620
c/n: 164
 
National Museum of the United States Air Force [Dayton, Ohio / USA (Wright-Patterson AFB)]