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Castor-4
 Castor-4 |
 Castor-4B |
 Castor-4AXL |
Solid fuel engine for stage 1 and strap-on applications
| Name | Manufacturer | Mass (kg) | Mass, Empt (kg) | Mass, Prop (kg) | Prop | Thrust Vac (kN) | ISP (sec) | Tot. Imp. (MNs) | Burn (s) | Diam (m) | Length (m) | Remark |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castor-4 (TX-526) | Thiokol | 10534 | 1269 | 407.20 | 228 | 54 | 1.00 | 9.10 | ||||
| Castor-4A (TX-780-1) | Thiokol | 11578 | 1457 | HTPB | 478.30 | 266 | 23846 | 56 | 1.00 | 9.20 | 7° Nozzle, Alt. | |
| Castor-4A (TX-780-2) | Thiokol | 11578 | 1457 | HTPB | 478.30 | 266 | 23846 | 56 | 1.00 | 9.20 | 11° Nozzle, Alt. | |
| Castor-4A (TX-780-3) | Thiokol | 11578 | 1457 | HTPB | 478.30 | 266 | 23846 | 56 | 1.00 | 9.20 | 7° Nozzle, Gr. | |
| Castor-4A (TX-780-4) | Thiokol | 11578 | 1457 | HTPB | 478.30 | 266 | 23846 | 56 | 1.00 | 9.20 | 11° Nozzle, Gr. | |
| Castor-4A (TX-780-5) | Thiokol | 11578 | 1457 | HTPB | 478.30 | 266 | 23846 | 56 | 1.00 | 9.20 | Gr. | |
| Castor-4AXL (TX-780XL) | Thiokol | 14851 | 1723 | HTPB | 599.80 | 269 | 34679 | 60 | 1.00 | 12.30 | ||
| Castor-4B (TX-780B) | Thiokol | 11400 | 1400 | HTPB | 430.60 | 281 | 64 | 1.00 | 9.20 | |||
| Castor-4BXL (TX-859) | Thiokol | HTPB |
