The Algol family of solid-fuel rocketstages and boosters built by Aerojet and used on a variety of launch vehicles. It was developed by Aerojet from the earlier Jupiter Senior and the Navy Polaris programs. Upgrades to the Algol motor occurred from 1960 till the retirement of the Scout launch vehicle in 1994. Solid propellant rocket stage. Loaded mass 10,705 kg. Thrust 470.93 kN Vacuum Specific Impulse 236 secs Variations Algol I, I-D, II, II-A, II-BA popular rating was 40KS-115,000, also known as Senior. They were initially developed as the first-stage motor of the Scout rocket. The design was based on the UGM-27 Polaris, a submarine-launched ballistic missile developed for the United States Navy at the Jet Propulsion Laboratory.
Algol 1 (XM-68)
; Algol 1 This rocket design started as the Polaris test motor, 31 feet in length with a diameter steel case, and 86,000 lb. of thrust. The eventual UGM-27 Polaris A-1 was larger, in length and in diameter. The Algol 1 was first used for a successful suborbital launch of a Scout X-1 rocket on September 2, 1960. This rocket started as a UGM-27 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. It was long, in diameter, and had a burn time of 27 seconds. Scaled up to diameter. Later versions for Scout D scaled to ; Algol 1-A Used on the Scout Xtest flight flown April 18, 1960. served as prototype vehicle for eventual Scout rocket. ;Algol 1-B Used on Scout X-1, RM-89 Blue Scout I, and RM-90 Blue Scout II. ;Algol 1-C Used on the Scout X-1A. After this single flight, the Scout X-2 with Algol 1-D replaced this prototype. ; Algol 1-D Used with Scout X-2, Scout X-2M and Little Joe II. Solid rocket stage. 440.00 kN thrust. Mass. It was first used on the Scout X-2 on March 29, 1962. It continued to be used on Scout X-2 and Scout X-2M launches until 1963. Algol 1-D was first used on the Little Joe II Qualification Test Vehicle in 1963. May 13, 1964 – Algol Boosts Little Joe II A-001 flight. An Aerojet-built Algol 1D heavy-duty rocket motor performed successfully for the 36th consecutive time on May 13, 1964, as it carried a NASA Little Joe II spacecraft on the Apollo program A-001 test flight. Averaging 96,650 pounds thrust, the Algol 1D was the largest solid rocket motor flying in non-military space programs. Test hardware on May's successful Apollo test flight included: an unmanned instrumented command module, service module, launch escape system and the Little Joe II launch system. Algol engine used on Little Joe II Thrust: 465 kN each Length: 9.1 m Diameter: 1 m Weight full: 10,180 kg Weight empty: 1,900 kg Fuel: solid Burn time: 40 s Status: Retired 1966. Gross mass:. Unfuelled mass:. Height:. Diameter:. Thrust: 440.00 kN. Burn time: 44 s. Number: 20.
Algol II
The Algol 2 series was first flown in 1962. It was used a first stage on Scout A, Scout B, Scout X-3, Scout X-4; It was proposed as a strap-on motor for the Titan 3BAS2 variant. It was also proposed for the Athena RTX program in 1969, losing to Thikol. B-165488, JAN. 17, 1969 Thrust : 513.300 kN. The 3BAS2 configuration of Titan 3B rocket proposed by Martin in the mid-1960s would have been used for deep space missions with a Centaur upper stage, Algol strap-on for liftoff thrust augmentation. It was never flown. CSD solid rocket engine. 564.2 kN. Isp=255s. Gross mass:. Unfuelled mass:. Height:. Diameter:. Thrust: 564.20 kN. Specific impulse: 255 s. Specific impulse sea level: 232 s. The Algol II-A was introduced in 1963 using the Aerojet 40 KS motor. It first flew on Scout-X3 in 1963. The Algol II-B was created after an Algol II-A flight failure, the nozzle was designed and designate the II-B model. It first flew on Scout-X4 The Algol II-C flew on Scout A1 and B1. Scout-A2, -B2, -C and -2 versions planned for Algol II-C were never used.
Algol III
In 1972, the Algol III was developed by the Chemical Systems Division of United Technologies. The Algol III was a new high-performance solid rocket motor developed for use as the first stage of the NASA SCOUT-D and -E launch vehicles. It was first flown on Scout D-1 in 1972. The motor diameter was increased, providing 104,500 lb thrust. This was a 30% improvement of lifting capacity versus the Algol II-B. The motor delivers a 30% gain in total impulse over its predecessor and provides a 35-45% gain in payload mass capability at a fractional increase in cost. Algol III has successfully completed development and qualification at United Technology Center under contract to LTV Aerospace Corp.'s Vought Missiles and Space Co., the SCOUT prime contractor for the NASA Langley Research Center. The Scout X-2 which in 1962 introduced the Antares IIB stage upgrade. On 1962-08-23 a Scout X-2 was used for the first successful launch of a DMSP satellite, lifting off from Point Arguello near Vandenberg Air Force Base. The Scout X-3 which in 1963 introduced the Algol IIA upgrade. The Scout A-1 and B-1 which in 1965 introduced the Castor IIA and Altair III upgrades, respectively. The Scout D-1 which in 1972 introduced the Algol III upgrade. The Scout G flew from 1974 until the Scout's retirement in 1994. It was rated to orbit a 210 kg payload.
