STAR Series (Thiokol)
Thiokol STAR motors cover a wide range of capabilities, from small 5" diameter stage separation retro rockets to a 75" diameter demonstration engine designed for perigee kick. Presented here is the STAR 48A, currently in use as a Space Shuttle upper stage.
| Specification | STAR 48A |
|---|---|
| Propellants | Ap / Al (???) |
| Max thrust | 21140 lb |
| Average thrust | 17,300 lb |
| Weight | 5674 lb |
| Burn time | 88 s |
| Effective specific impulse | 283.4 |
| Total impulse | 1,528,409 lbf-s |
| Expansion ratio | 27.3 |
| Mass fraction | .94 |
| Chamber pressure | 542 psia |
RSRM : Castor 