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Model: Algol 1. Gross Mass: 10,705 kg (23,600 lb). Empty Mass: 1,900 kg (4,100 lb). Thrust (vac): 470.934 kN (105,870 lbf). Isp: 236 sec. Burn time: 40 sec. Propellants: Solid. Isp(sl): 214 sec. Diameter: 1.01 m (3.31 ft). Span: 1.01 m (3.31 ft). Length: 9.12 m (29.92 ft). Country: USA. No Engines: 1. Motor: Algol 1. Status: Retired 1962. Cost $ : 2.900 million. First Flight: 1960. Last Flight: 1962. No Launched: 15. No Failed: 1. Other designations: Senior.

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.

Model: Algol 1D. Gross Mass: 10,700 kg (23,500 lb). Empty Mass: 1,200 kg (2,600 lb). Thrust (vac): 440.000 kN (98,910 lbf). Burn time: 44 sec. Propellants: Solid. Diameter: 1.02 m (3.34 ft). Length: 9.40 m (30.80 ft). Country: USA. No Engines: 1. Motor: Algol ID. Status: Retired 1966. First Flight: 1962. Last Flight: 1966. No Launched: 20. Used as: Scout. Release conditions: LTV.

Model: Algol 2. Gross Mass: 11,600 kg (25,500 lb). Empty Mass: 1,650 kg (3,630 lb). Thrust (vac): 564.245 kN (126,847 lbf). Isp: 255 sec. Burn time: 47 sec. Propellants: Solid. Isp(sl): 232 sec. Diameter: 1.01 m (3.31 ft). Span: 1.01 m (3.31 ft). Length: 9.09 m (29.82 ft). Country: USA. No Engines: 1. Motor: Algol 2. Status: Study 1965. Cost $ : 2.900 million. First Flight: 1957. Last Flight: 1976. No Launched: 50.

Model: Algol 2B. Gross Mass: 10,700 kg (23,500 lb). Empty Mass: 1,170 kg (2,570 lb). Thrust (vac): 400.000 kN (89,920 lbf). Burn time: 80 sec. Propellants: Solid. Diameter: 1.02 m (3.34 ft). Length: 9.10 m (29.80 ft). Country: USA. No Engines: 1. Motor: Algol IIB. Status: Retired 1971. First Flight: 1965. Last Flight: 1971. No Launched: 29. Used as: Scout. Release conditions: LTV.

Model: Algol 2C. Gross Mass: 10,800 kg (23,800 lb). Empty Mass: 1,200 kg (2,600 lb). Thrust (vac): 436.000 kN (98,016 lbf). Burn time: 76 sec. Propellants: Solid. Diameter: 1.02 m (3.34 ft). Length: 9.10 m (29.80 ft). Country: USA. No Engines: 1. Motor: Algol IIC. Status: O. Used as: Scout. Release conditions: LTV.

Model: Algol 3. Gross Mass: 14,320 kg (31,570 lb). Empty Mass: 1,600 kg (3,500 lb). Thrust (vac): 471.905 kN (106,088 lbf). Isp: 284 sec. Burn time: 75 sec. Propellants: Solid. Isp(sl): 238 sec. Diameter: 1.14 m (3.74 ft). Span: 1.14 m (3.74 ft). Length: 9.40 m (30.80 ft). Country: USA. No Engines: 1. Motor: Algol 3. Status: Study 1993. Cost $ : 2.900 million. First Flight: 1972. Last Flight: 1994. No Launched: 44.

Model: Algol 3A. Gross Mass: 14,732 kg (32,478 lb). Empty Mass: 2,030 kg (4,470 lb). Thrust (vac): 464.707 kN (104,470 lbf). Isp: 259 sec. Burn time: 84 sec. Propellants: Solid. Isp(sl): 226 sec. Diameter: 1.14 m (3.74 ft). Span: 1.14 m (3.74 ft). Length: 9.40 m (30.80 ft). Country: USA. No Engines: 1. Motor: Algol 3A. Status: In Production. Cost $ : 2.900 million. First Flight: 1974. Last Flight: 1974. No Launched: 1.

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