Encyclopedia Astronautica
Double HPAG Deacon-2


Solid rocket stage. 26.00 kN (5,845 lbf) thrust. Mass 100 kg (220 lb).

Status: Retired 1963.
Gross mass: 100 kg (220 lb).
Unfuelled mass: 24 kg (52 lb).
Height: 2.80 m (9.10 ft).
Diameter: 0.17 m (0.55 ft).
Thrust: 26.00 kN (5,845 lbf).
Burn time: 3.00 s.
Number: 380 .

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Associated Countries
Associated Engines
Associated Launch Vehicles
  • Deacon American test vehicle. The Deacon was an advanced solid rocket motor design cancelled at the end of World War II. In 1947 NACA began using reworked surplus motors to boost instrumented subscale aircraft models to speeds of up to Mach 4. They became a workhorse for the Agency's aerodynamic research, resulting in new production. Thousands were flown, until, by the end of the 1950's, supersonic wind tunnels took over the job. Data shown is for single-stage version. More...
  • Double Deacon American test vehicle. Single stage vehicles consisting of 2 Deacon motors fired in parallel. More...
  • Deacon Deacon American test vehicle. Two stage vehicle consisting of 1 x Deacon + 1 x Deacon More...
  • Deacon HVAR American test vehicle. Two stage vehicle consisting of 1 x Deacon + 1 x HVAR More...
  • Deacon Rockoon American sounding rocket. The Rockoon concept involved release of a 12 m diameter balloon from a ship, which took a Deacon sounding rocket to 9 to 27 km altitude in 80 minutes. The rocket was ignited at a preset time or altitude or by remote control, and then boosted an 18 kg payload to a 50 to 100 km altitude. The Deacon was painted black and wrapped in plastic to protect it against the cold, and fitted with larger fins for stability at high altitude. More...
  • Quad Deacon American test vehicle. Single stage vehicle consisting of 4 Deacons fired in parallel. More...
  • HPAG Deacon American test vehicle. Two stage vehicles consisting of HPAG boosters + 1 x Deacon More...
  • Nike Deacon American test vehicle. Two-stage rocket using surplus Nike boosters and Deacon sounding rocket upper stage. The combination was much cheaper than Aerobee, and unlike Rockoon could be launched from fixed launchers in two and a half hours. It was used for 'falling sphere' air density studies, atmospheric soundings, and for heat transfer studies launched from NACA Wallops Island. More...
  • Deacon Rockoon Loki Two stage version of Rockoon balloon-launched soundinr coekt consisting of a Deacon first stage and Loki second stage. More...
  • Terrapin American test vehicle. Terrapin sounding rockets were two-stage vehicles launched from Wallops Island. The Terrapin sounding rocket was developed by Republic Aviation under a National Security Agency contract for a University of Maryland project that allowed graduate students to study the upper atmosphere. The two-stage rocket used a Deacon motor with a slow-burn grain for the lower stage, and a TSI upper stage. The upper stage was equipped with low-drag swept stabilising fins. More...
  • Rockaire American air-launched sounding rocket. This USAF version of the Navy Rockair (research rocket launched from aircraft) vehicle consisted of a Deacon rocket launched from an F-86D Sabrejet fighter. More...
  • Deacon Judi American test vehicle. Two stage vehicle consisting of 1 x Deacon + 1 x Judi III More...

Associated Manufacturers and Agencies
Associated Propellants
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

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