Encyclopedia Astronautica
Algol 1


Aerojet solid rocket engine. 470.9 kN. Isp=236s. This rocket started as a Polaris test motor with a 40 inch diameter, which at the time was the largest solid motor ever tested. First flight 1960.

This rocket started as a Polaris test motor with a 40 inch diameter, which at the time was the largest solid motor ever tested. It had a nominal performance rating of 45 seconds duration and 45,000 kgf thrust. Variations included Algol I, I-D, II, II-A, II-B and possibly others. Another popular rating was 40KS-115,000 (52,000 kgf for 40 seconds), also known as Senior.

Thrust (sl): 427.000 kN (95,993 lbf). Thrust (sl): 43,545 kgf.

AKA: Aerojet Sr; Senior.
Gross mass: 10,705 kg (23,600 lb).
Unfuelled mass: 1,900 kg (4,100 lb).
Height: 9.12 m (29.92 ft).
Diameter: 1.01 m (3.31 ft).
Thrust: 470.90 kN (105,863 lbf).
Specific impulse: 236 s.
Specific impulse sea level: 214 s.
Burn time: 40 s.
Number: 20 .

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Associated Countries
See also
Associated Launch Vehicles
  • Scout X-1 American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 1B + 1 x Castor + 1 x Antares + 1 x Altair More...
  • Blue Scout 1 American suborbital launch vehicle. Air Force version of Scout used for suborbital tests. More...
  • Blue Scout 2 American all-solid orbital launch vehicle. Air Force version of Scout used for suborbital and orbital military tests. More...
  • Scout X-2 American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 1D + 1 x Castor + 1 x Antares 2 + 1 x Altair More...

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

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...

Associated Stages
  • Algol 1 Solid propellant rocket stage. Loaded/empty mass 10,705/1,900 kg. Thrust 470.93 kN. Vacuum specific impulse 236 seconds. This rocket started as a Polaris test motor with a 40 inch diameter, which at the time was the largest solid motor ever tested. It had a nominal performance rating of 45 seconds duration and 45,000 kgf thrust. Variations included Algol I, I-D, II, II-A, II-B and possibly others. Another popular rating was 40KS-115,000 (52,000 kgf for 40 seconds), also known as Senior. More...

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