Encyclopedia Astronautica
Sergeant Hydac


American sounding rocket. Two stage vehicle consisting of 1 x Sergeant + 1 x Hydac

Gross mass: 4,800 kg (10,500 lb).
Height: 13.80 m (45.20 ft).
Diameter: 0.79 m (2.59 ft).
Apogee: 500 km (310 mi).
First Launch: 1974.12.18.
Last Launch: 1981.03.12.
Number: 7 .

More... - Chronology...


Associated Countries
See also
  • Sergeant Single-stage solid-propulsion tactical ballistic missile developed for the US Army. Surplus rockets and the Sergeant's rocket motor (known commercially as Castor) became the basis for many sounding rockets. More...

Associated Manufacturers and Agencies
  • Aerojet American manufacturer of rockets, spacecraft, and rocket engines. Aerojet, Sacramento, CA, USA. More...

Associated Launch Sites
  • Poker Flat Sounding rocket launch site. In use from 1969 to present. Poker Flat Rocket Range (PFRR) contains five major launch pads. Pads 1 and 2 each have a 7.5K launcher, pads 3 and 4 each contain 20K MRL launchers, and pad 5 contains a 4K twin boom launcher. Pad 3 is equipped with a moveable launcher enclosure which can be used to protect a rocket on pad 3 and workers from the severe winter weather. More...
  • Barking Sands Military missile test and sounding rocket launch site. In use from 1962 to present. Sandia National Laboratories operates the Kauai Test Facility for the Department of Energy and, through inter-Service Support Agreements provides the Barking Sands Pacific Missile Range Facility with rocket launch services for target systems and upper atmosphere measurements. PMRF/KTF is recognized in the INF Treaty as an authorized site from which launches of the STARS missile can be conducted. The site was recently involved in anti-ballistic missile tests. Known to have been used for 2320 launches from 1962 to 2007, reaching up to 1000 kilometers altitude. More...

Associated Stages
  • Sergeant Solid propellant rocket stage. Loaded/empty mass 42/21 kg. Thrust 6.66 kN. Vacuum specific impulse 235 seconds. More...

Sergeant Hydac Chronology


1974 December 18 - . 00:58 GMT - . Launch Site: Poker Flat. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac. LV Configuration: Sergeant Hydac SH74-1.
  • Ballistic Test - . Nation: USA. Agency: Sandia. Apogee: 500 km (310 mi).

1975 March 12 - . 07:48 GMT - . Launch Site: Poker Flat. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac. LV Configuration: Sergeant Hydac IC519.07-1B.
  • ICECAP 75A Auroral mission - . Nation: USA. Agency: DNA; AFCRL. Apogee: 500 km (310 mi).

1978 February 28 - . 08:10 GMT - . Launch Site: Poker Flat. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac. LV Configuration: Sergeant Hydac DNA IC819.08-1.
  • MULTI-WIDEBAND Infrared technology mission - . Nation: USA. Agency: DNA. Apogee: 458 km (284 mi).

1979 September 25 - . Launch Site: Barking Sands. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac.
  • HAVE LENT IV ABRES test - . Nation: USA. Agency: USAF. Apogee: 400 km (240 mi).

1981 February 25 - . 17:20 GMT - . Launch Site: Poker Flat. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac.
  • HAVE SLED test - . Nation: USA. Agency: USAF BMO. Apogee: 400 km (240 mi).

1981 March 5 - . 16:48 GMT - . Launch Site: Poker Flat. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac.
  • HAVE SLED test - . Nation: USA. Agency: USAF BMO. Apogee: 400 km (240 mi).

1981 March 12 - . 04:30 GMT - . Launch Site: Poker Flat. LV Family: Sergeant. Launch Vehicle: Sergeant Hydac.
  • HAVE SLED test - . Nation: USA. Agency: USAF BMO. Apogee: 400 km (240 mi).

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