Antares 2

Antares 2 was an American solid rocket engine stage and engine built by Hercules/ABL / Thiokol. It was used from the mid-1960s to 1995, in the Scout and Strypi family of rockets, and on the Project FIRE Velocity Packages. It burned solid propellant – the stage was also the engine's fuel chamber - and was used about 96 times.

Details

Basic details of the X-259 engine:

Thrust:
Gross mass:
Unfuelled mass:
Specific impulse: 293 s.
Specific impulse sea level: 233 s.
Burn time: 36 s.
Height:
Diameter:
Variants

There were various variants:

Antares 2 was used on Scout X-2 1C, B 2A, B-1 F, D-1 F and D; Strypi Tomahawk, XI and IX; SPARTA and Athena H
Antares 2A was used on Scout-X2, X2B, X2M, X3, X3A, X3C, X3M, X4, X4A, X5C, A, A1, B, B1, C, and D1; and Project FIRE;
Antares 2B was used on Scout-A2, B2, E1 and Scout-F1.