Sikorsky HH-52A Seaguard

 

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.

 

 

Attribution

Attribution
Overview
Parent type Sikorsky S-62/HH-52
Variant *No Variant assigned
Design authority Sikorsky Aircraft Corp.
Primary manufacturer Sikorsky Aircraft Corp.
Key Characteristics
Operational status No longer flying
Max gross weight (ground) 3,765 kg 8,300 lb
Crew 3
Seating arrangement Side-by-side
Configuration
VTOL type Helicopter
Compound type None
Lift configuration Single main rotor
Control device type Tail rotor
Features
Number of engines 1
Number of propulsors 0
Number of lift devices 1
Number of control devices 1
Milestones associated with the Sikorsky HH-52A Seaguard
1979 A Sikorsky HH-52A rescues 22 people from the Burmah Agate maritime disaster

Sikorsky HH-52A Seaguard

 

Dimensions for HH-52

 

 

Image coming soon!

Overall Dimensions
Overall height   148 4.87 m 16.0 ft
Overall length   148 18.97 m 62.3 ft
Overall width   148 15.85 m 52.0 ft
Note: All dimensions may be governed by the the diameter of an external rotor.
Airframe Dimensions
Airframe height   148 4.33 m 14.2 ft
Airframe length   148 13.58 m 44.5 ft
Airframe width   148 4.57 m 15.0 ft
Landing Gear Dimensions
Landing gear type Wheels (some retractable)
Landing gear base  
Landing gear track   148 3.71 m 12.2 ft
Cabin Dimensions
Cabin height  
Cabin length  
Cabin width  

Sikorsky HH-52A Seaguard

 

De-rated from 1250 shp to 730 shp for this application

 

 

Image coming soon!

Powerplant
Manufacturer GE Aviation
Powerplant designation T58-GE-8 (HH-52)
Type Turbine
Normal Ratings (uninstalled, sea level, static)
Max. continuous power  
Intermediate power  
Maximum power  
Take-off power  [ 148 ] 544 kW 730 hp
   

Sikorsky HH-52A Seaguard

 

HH-52 main rotor

 

 

Attribution

Attribution
Main Rotor Characteristics
Hub type Fully articulated
Direction of rotation Counterclockwise
Diameter   148 15.85 m 52.00 ft
RPM  
Main Rotor Blade Characteristics
Blades per rotor 3
Blade chord   148 0.417 m 1.37 ft
Blade twist  
Construction
Tip geometry Conventional
Main Rotor Derived Characteristics
Disk area 197.30 m² 2,123.8 ft²
Disk loading 19.08 kg/m² 3.908 lb/ft²
Solidity 0.0502
Note: disk loading is based on max gross weight (on ground) to help compare the widest range of aircraft.
Main Rotor Blade Derived Characteristics
Area per blade 3.30 m² 35.5 ft²
Blade tip speed  
Note: blade area is calculated as rotor radius times blade chord and ignores any root cut-out.

Sikorsky HH-52A Seaguard

 

Tapered chord blade

 

 

Attribution
Tail Rotor Characteristics
Hub type Fully articulated
Direction of rotation Top blade aft
Diameter   148 2.67 m 8.75 ft
RPM  
Configuration Pusher
Tail Rotor Blade Characteristics
Blades per rotor 2
Blade chord   148  
Blade twist  
Construction
Tail Rotor Derived Characteristics
Disk area 5.59 m² 60.1 ft²
Solidity  
Tail Rotor Blade Derived Characteristics
Area per blade  
Blade tip speed  

Sikorsky HH-52A Seaguard

 

NOTE: the performance data shown is for the aircraft in the standard, clean configuration and weights detailed below, at International Standard Atmosphere (ISA) sea-level conditions. Any deviation from these conditions will be defined in the general notes below, or in any references accompanying a specific data point.

 

HH-52 performance

 

 
Weights
Maximum 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
Limitations
Never exceed speed  
Max. level flight speed   148 176 km/h 95 kts
Service ceiling   148 3,414 m 11,200 ft
Normal Ratings (uninstalled, sea level, static)
Powerplant GE T58-GE-8 (HH-52)
Number of engines   1
Max. continuous power  
Intermediate power  
Maximum power  
Take-off power   148 544 kW 730 hp
Note: all powers quoted are per engine.
Range and Endurance
Range (no reserve)   148 741 km 400 nm
Endurance (no reserve)  
Hover Performance
Hover ceiling IGE  
Hover ceiling OGE  
Climb Performance
Maximum rate of climb  

Sikorsky HH-52A Seaguard

 

Operated By
United States Coast Guard Out of service

Sikorsky HH-52A Seaguard

 

Forum Proceedings related to the Sikorsky HH-52A Seaguard

We were unable to find any Forum Proceedings for this aircraft. Please try searching at the overall type level.

 

 

Vertiflite articles related to the Sikorsky HH-52A

We were unable to find any Vertiflite articles for this aircraft. Please try searching at the overall type level.

 

Content from the AHS website related to the Sikorsky HH-52A

 

We were unable to find any files on the AHS website for this aircraft.

 

Web pages

 

May 2013

 

 

Articles from the Journal of the American Helicopter Society related to the Sikorsky HH-52A

Journal articles are hosted by our Journal provider, IngentaConnect. If relevant Journal articles do not appear below, please feel free to visit the IngentaConnect site directly.

 

 

 

Articles from NASA Technical Reports Server related to the Sikorsky HH-52A

 

Patent information from the US Patent and Trademark Office related to the Sikorsky HH-52A

 

Google Books related to the Sikorsky HH-52A

Sikorsky HH-52A Seaguard

 


Attribution

Attribution

Attribution

Attribution
 

Attribution
 

*** New system here ***

 

Overview

 

 

Main rotor

 

 

Tail rotor

 

 

Sikorsky HH-52A Seaguard

Aircraft Notes

Ref. Author(s) Title Source Date Type
148 Devine, V S-62 (HH-52A, S-62A, S-62B, S-62C) Igor Sikorsky Historical Archives, Sikorsky Product History 14 Jun 2015 Website
  Comprehensive history of the design and development of the model
148 Devine, V S-62 (HH-52A, S-62A, S-62B, S-62C) Igor Sikorsky Historical Archives, Sikorsky Product History 14 Jun 2015 Website
  Comprehensive history of the design and development of the model