Encyclopedia Astronautica
HJ Hydac


American sounding rocket. Two stage vehicle consisting of 1 x M-6 + 1 x Hydac

Status: Retired 1978.
Gross mass: 2,600 kg (5,700 lb).
Height: 11.30 m (37.00 ft).
Diameter: 0.58 m (1.90 ft).
Thrust: 365.00 kN (82,055 lbf).
Apogee: 150 km (90 mi).
First Launch: 1976.04.01.
Last Launch: 1978.03.01.
Number: 3 .

More... - Chronology...


Associated Countries
See also
  • Honest John Unguided single-stage solid-propellant US Army missile developed by Douglas Aircraft. It was later used as the booster stage for a range of sounding rockets, test vehicles, and targets. 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...

Associated Stages
  • HJ Nike-1 Solid propellant rocket stage. Loaded/empty mass 1,900/954 kg. Thrust 365.00 kN. Rocket motor originally developed for the Army Honest John tactical missile. In sounding rocket applications the interstage adapter was bolted to the front of the Taurus and consisted of a conical shaped adapter which slip-fit into the second stage nozzle, thus providing for drag separation at Taurus burnout. Each Taurus fin was 0.46 square meters in area. Normally, the fins were canted to provide a two revolutions per second spin rate at Taurus burnout. The weight of the booster system is 3005 pounds. More...

HJ Hydac Chronology


1976 April 1 - . 09:28 GMT - . Launch Site: Poker Flat. LV Family: Honest John. Launch Vehicle: HJ Hydac. LV Configuration: HJ Hydac ARPA WS650.27-1.
  • Ballistics test - . Nation: USA. Agency: DARPA. Apogee: 150 km (90 mi).

1977 November 15 - . 10:33 GMT - . Launch Site: Poker Flat. LV Family: Honest John. Launch Vehicle: HJ Hydac. LV Configuration: HJ Hydac ARPA WS710.51-1.
  • WIDEBAND Ionosphere mission - . Nation: USA. Agency: DARPA. Apogee: 170 km (100 mi).

1978 March 1 - . 19:06 GMT - . Launch Site: Poker Flat. LV Family: Honest John. Launch Vehicle: HJ Hydac. LV Configuration: HJ Hydac ARPA WS810.51-2.
  • WIDEBAND Ionosphere mission - . Nation: USA. Agency: DARPA. Apogee: 170 km (100 mi).

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