Sikorsky HO5S-1
notes: label: Summary
content: Sikorsky HO5S-1
label: Summary
content: The HO5S-1 served as the Marine Corps’ primary medical evacuation helicopter in the final year of the Korean War. Able to carry wounded on internally-mounted litters with an attendant, it was an improvement over other light utility helicopters that required the wounded to ride outside of the fuselage while exposed to harsh conditions. The HO5S-1 featured an opening front bubble for easy access, a rear-mounted (and severely underpowered) engine configured to maximize internal carrying capacity and offset rotor blade flapping hinges to improve control and stability, which made it ideal for night flying.
label: Summary
content: In July 1952, this HO5S-1, one of only a handful of surviving Korean War helicopters, was one of the first examples delivered to Observation Squadron VMO-6, which performed the majority of helicopter-borne medical evacuations for wounded Marines in Korea, evacuating over 5,000 seriously wounded personnel. Postwar, it served with Orlando Helicopter Airways as an air taxi and crop sprayer, as well as a platform to test an all-electric drive system.
label: Summary
content: Rotor diameter:10.1 m (33 ft)
label: Summary
content: Length:9.1 m (29 ft 9 in)
label: Summary
content: Height:2.6 m (8 ft 7 in)
label: Summary
content: Weight, empty:802 kg (1,768 lb)
label: Summary
content: Weight, gross:1,225 kg (2,700 lb)
label: Summary
content: Top speed:185 km/h (115 mph)
label: Summary
content: Engine:Aircooled Motors, O-425-1, 245 hp
label: Summary
content: Manufacturer:Sikorsky Aircraft Div., United Aircraft Corp., Bridgeport, Conn., 1952
setName: label: See more items in
content: National Air and Space Museum Collection
label: Location
content: Steven F. Udvar-Hazy Center in Chantilly, VA
label: Exhibit Station
content: Korea and Vietnam Aviation
creditLine: label: Credit Line
content: Gift of the Nancy and Fred Clark Family.
dataSource: label: Data Source
content: National Air and Space Museum
identifier: label: Inventory Number
content: A20070091000
objectType: label: Type
content: CRAFT-Rotary Wing
objectRights: label: Restrictions & Rights
content: CC0
physicalDescription: label: Materials
content: Metal, Plexiglas
label: Dimensions
content: 28ft. 8in. x 8ft. x 8ft. 9in.