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Engine Model: Algol 1. Manufacturer Name: Senior. Other Designations: Aerojet Sr. Designer: Aerojet. Gross Mass: 10,705 kg (23,600 lb). Empty Mass: 1,900 kg (4,100 lb). Propellants: Solid. Thrust(vac): 470.900 kN (105,863 lbf). Thrust(sl): 427.000 kN (95,993 lbf). Isp: 236 sec. Isp (sea level): 214 sec. Burn time: 40 sec. Diameter: 1.01 m (3.31 ft). Length: 9.12 m (29.92 ft). Chambers: 1. Country: USA. First Flight: 1960. Last Flight: 1963. Flown: 20.

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.

Engine Model: Algol 2. Designer: CSD. Gross Mass: 11,600 kg (25,500 lb). Empty Mass: 1,650 kg (3,630 lb). Propellants: Solid. Thrust(vac): 564.200 kN (126,837 lbf). Thrust(sl): 513.300 kN (115,394 lbf). Isp: 255 sec. Isp (sea level): 232 sec. Burn time: 47 sec. Diameter: 1.01 m (3.31 ft). Length: 9.09 m (29.82 ft). Chambers: 1. Country: USA. First Flight: 1962. Last Flight: 1976. Flown: 67.

Engine Model: Algol 3. Designer: CSD. Gross Mass: 14,320 kg (31,570 lb). Empty Mass: 1,600 kg (3,500 lb). Propellants: Solid. Thrust(vac): 471.900 kN (106,087 lbf). Thrust(sl): 395.500 kN (88,912 lbf). Isp: 284 sec. Isp (sea level): 238 sec. Burn time: 75 sec. Diameter: 1.14 m (3.74 ft). Length: 9.40 m (30.80 ft). Chambers: 1. Country: USA. First Flight: 1972. Last Flight: 1994. Flown: 36.

Engine Model: Algol 3A. Designer: CSD. Gross Mass: 14,732 kg (32,478 lb). Empty Mass: 2,030 kg (4,470 lb). Propellants: Solid. Thrust(vac): 464.700 kN (104,469 lbf). Thrust(sl): 405.500 kN (91,160 lbf). Isp: 259 sec. Isp (sea level): 226 sec. Burn time: 84 sec. Diameter: 1.14 m (3.74 ft). Length: 9.40 m (30.80 ft). Chambers: 1. Chamber Pressure: 31.00 bar. Area Ratio: 6.50. Country: USA. Status: In Production.

Engine Model: Algol ID. Designer: CSD. Gross Mass: 10,700 kg (23,500 lb). Empty Mass: 1,200 kg (2,600 lb). Propellants: Solid. Thrust(vac): 440.000 kN (98,910 lbf). Burn time: 44 sec. Diameter: 1.02 m (3.34 ft). Length: 9.40 m (30.80 ft). Country: USA.

Engine Model: Algol IIB. Designer: CSD. Gross Mass: 10,700 kg (23,500 lb). Empty Mass: 1,170 kg (2,570 lb). Propellants: Solid. Thrust(vac): 400.000 kN (89,920 lbf). Burn time: 80 sec. Diameter: 1.02 m (3.34 ft). Length: 9.10 m (29.80 ft). Country: USA.

Engine Model: Algol IIC. Designer: CSD. Gross Mass: 10,800 kg (23,800 lb). Empty Mass: 1,200 kg (2,600 lb). Propellants: Solid. Thrust(vac): 436.000 kN (98,016 lbf). Burn time: 76 sec. Diameter: 1.02 m (3.34 ft). Length: 9.10 m (29.80 ft). Country: USA.

Algol used on Rocket Stages
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