Sikorsky XHJS

{{one source|date=April 2017}}  {{Infobox aircraft | name = Sikorsky S-53 / XHJS-1 | logo = | logo_size = | image = Sikorsky XHJS-1 helicopter in flight c1948.jpg | alt = | caption = | long_caption = | other_names = | aircraft_type = [[Helicopter]] | aim = | outcome = | related = | national_origin = United States | manufacturer = [[Sikorsky Aircraft]] | design_group = | designer = | builder = | issuer = | status = | owners = | primary_user = [[United States Navy]] | more_users = | service = | major_applications = | proposals = | prototypes = | number_built = 2 | construction_number = | civil_registration = | military_serial = | radio_code = | requirement = | aircraft_carried = | flights = | total_hours = | total_distance = | construction_date = | introduction = | retired = | first_flight = 22 September 1947 | initiated = | in_service = | last_flight = | expected = | developed_from = [[Sikorsky H-5|Sikorsky S-51]] | variants = | developed_into = | preservation = | fate = | predecessors = | successors = | concluded = }}

The '''Sikorsky XHJS-1''' (manufacturer designation '''S-53'''), was developed by [[Sikorsky Aircraft]] to meet a Naval requirement for a utility helicopter. The XHJS-1 was not ordered into production and only two prototypes were built.<ref name="Andrade" />

==Design and development== Powered by a {{convert|525|hp|kW|0|abbr=on}} [[Continental R-975|Continental R-975-34]], the S-53 was a development of the [[Sikorsky H-5|S-51]] designed for use on aircraft carriers. The tail rotor was raised above head-height to give more clearance and the landing gear was made stronger to enable operations from a moving deck. Other enhancements were a folding main rotor and the option for amphibious landing gear. Two prototypes were ordered by the United States Navy as the '''XHJS-1'''<ref name="Andrade" /> and the first flew on 22 September 1947. The type was evaluated against the [[Piasecki H-25|Piasecki XHJP-1]]. With the Piasecki design being ordered as the HUP-1 by the Navy, the S-53 was not developed further.

==Variants== ;XHJS-1 :Prototype naval utility helicopter, two built.<ref name="Andrade" />

==Specifications (XHJS-1)== {{Aircraft specs |ref= |prime units?=imp  |genhide= |crew=one |capacity=three |length m= |length ft= |length in= |length note= |span m= |span ft= |span in= |span note= |upper span m= |upper span ft= |upper span in= |upper span note= |mid span m= |mid span ft= |mid span in= |mid span note= |lower span m= |lower span ft= |lower span in= |lower span note= |swept m= |swept ft= |swept in= |swept note= |dia m= |dia ft= |dia in= |dia note= |width m= |width ft= |width in= |width note= |height m= |height ft= |height in= |height note= |wing area sqm= |wing area sqft= |wing area note= |swept area sqm= |swept area sqft= |swept area note= |volume m3= |volume ft3= |volume note= |aspect ratio= |airfoil= |empty weight kg= |empty weight lb= |empty weight note= |gross weight kg= |gross weight lb= |gross weight note= |max takeoff weight kg= |max takeoff weight lb= |max takeoff weight note= |lift kg= |lift lb= |lift note= |more general=  |eng1 number=1 |eng1 name=[[Continental R-975|Continental R-975-34]] |eng1 type= |eng1 kw= |eng1 hp=525 |eng1 kn= |eng1 lbf= |eng1 note= |power original= |thrust original= |eng1 kn-ab= |eng1 lbf-ab= |eng2 number= |eng2 name= |eng2 type= |eng2 kw= |eng2 hp= |eng2 kn= |eng2 lbf= |eng2 note= |eng2 kn-ab= |eng2 lbf-ab= |eng3 number= |eng3 name= |eng3 type= |eng3 kw= |eng3 hp= |eng3 kn= |eng3 lbf= |eng3 note= |eng3 kn-ab= |eng3 lbf-ab= |more power= |prop blade number= |prop name= |prop dia m= |prop dia ft= |prop dia in= |prop note= |rot number=1 |rot dia m= |rot dia ft=49 |rot dia in=0 |rot area sqm= |rot area sqft= |rot area note=  |perfhide=Y |max speed kmh= |max speed mph= |max speed kts= |max speed note= |max speed mach= |cruise speed kmh= |cruise speed mph= |cruise speed kts= |cruise speed note= |stall speed kmh= |stall speed mph= |stall speed kts= |stall speed note= |never exceed speed kmh= |never exceed speed mph= |never exceed speed kts= |never exceed speed note= |minimum control speed kmh= |minimum control speed mph= |minimum control speed kts= |minimum control speed note= |range km= |range miles= |range nmi= |range note= |combat range km= |combat range miles= |combat range nmi= |combat range note= |ferry range km= |ferry range miles= |ferry range nmi= |ferry range note= |endurance= |ceiling m= |ceiling ft= |ceiling note= |g limits= |roll rate= |glide ratio= |climb rate ms= |climb rate ftmin= |climb rate note= |sink rate ms= |sink rate ftmin= |sink rate note= |lift to drag= |wing loading kg/m2= |wing loading lb/sqft= |wing loading note= |disk loading kg/m2= |disk loading lb/sqft= |disk loading note= |power/mass met= |power/mass imp= |power/mass note= |thrust/weight= |thrust/weight note= |more performance=  |armament= |guns= |bombs= |rockets= |missiles= |hardpoints= |hardpoint capacity= |hardpoint rockets= |hardpoint missiles= |hardpoint bombs= |hardpoint other= |avionics= }}

==See also== {{aircontent| |related= * [[Sikorsky S-51]] |similar aircraft= *[[Piasecki H-25|Piaseckli XHUP-1]] |see also= |lists= }}

==References== {{commons category|Sikorsky XHJS}} ;Notes <references> <ref name="Andrade">Andrade 1979, p. 194</ref> </references>

;Bibliography * {{cite book |last= Andrade |first= John |title= U.S.Military Aircraft Designations and Serials since 1909|year=1979 |publisher=Midland Counties Publications|isbn= 0-904597-22-9}}

[[Category:Sikorsky aircraft|HJS]] [[Category:United States military helicopters]] [[Category:1940s United States military utility aircraft]] [[Category:1940s United States helicopters]] [[Category:Single-engined piston helicopters]] [[Category:Aircraft first flown in 1947]]