A derivative of the world’s first truly amphibious helicopter, the Sikorsky HH-52A entered service with the US Coast Guard in 1962, and remained in service until 1989. The first turbine-powered helicopter operated by the USCG, the HH-52 could land and take off from the water. It had a boat-shaped hull and even carried an anchor.


Credited with saving over 15,000 lives, the HH-52A was small enough to be deployed from USCG cutters, but was designed to carry a crew of three and up to ten rescuees. It carried a record 12 rescuees, along with the crew, during the Burmah Agate maritime disaster in 1979.


Data on design, manufacture and status

Design authority: Sikorsky Aircraft Corp.

Primary manufacturer: Sikorsky Aircraft Corp.

Parent type: Sikorsky S-62/HH-52

Aircraft status: No longer flying


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 3

Crew seating: Side-by-side

Landing gear: Wheels (some retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 4.87 m 16.0 ft
Overall Length: 18.97 m 62.3 ft
Overall Width: 15.85 m 52.0 ft
Airframe Dimensions
Airframe Length: 13.58 m 44.5 ft
Airframe Width: 4.57 m 15.0 ft
Airframe Height: 4.33 m 14.2 ft
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track: 3.71 m 12.2 ft
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 3,765 kg 8,300 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 3,765 kg 8,300 lb
Empty Weight: 2,306 kg 5,084 lb
Useful Load: 1,459 kg 3,217 lb
Empty Weight Fraction: 0.612
Climb Performance
Max Rate of Climb:  
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 176 km/h 95 kts
Never Exceed Speed:  
Service Ceiling: 3,414 m 11,200 ft
Range and Endurance
Max Range: 741 km 400 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Number of engines: 1
Designation: GE T58-GE-8 (HH-52) turbine
Manufacturer: GE Aviation
Normal Ratings
Max continuous:  
Take-off / rated: 544 kW 730 hp
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Main Rotor Characteristics
Diameter: 15.85 m 52.00 ft
Direction of Rotation: Counterclockwise
Hub Type: Fully articulated
Main Rotor Blade Characteristics
Blade Construction:
Blade Chord: 0.417 m 1.37 ft
Blade Tip Geometry: Conventional
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 197.30 m² 2123.8 ft²
Disc Loading: 19.08 kg/m² 3.908 lb/ft²
Solidity: 0.0502
Main Rotor Blade Derived Characteristics
Blade area per blade: 3.30 m² 35.5 ft²
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

Tapered chord blade

Tail Rotor Characteristics
Diameter: 2.67 m 8.75 ft
Configuration: Pusher
Direction of Rotation: Top blade aft
Tail Rotor Blade Characteristics
Number of Blades: 2
Blade Construction:
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 5.59 m² 60.1 ft²
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

Related VFS Resources

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Related Public Resources

Resources related to the HH-52A (S-62C) Seaguard, provided by public sources across the internet.