Engine Family
Pressure-fed engines for Heretic. A 250 kN booster cluster and two upper-stage variants.
The cluster uses a simple, robust feed architecture while supporting long burn durations and deep throttling capability. It is a foundational step toward larger launch and transfer vehicles.
Booster cluster hardware is being produced directly, through welding and additive manufacturing.
| Variant | Thrust | Count | Stage | Status |
|---|---|---|---|---|
| Belka 50 | 50 kN | 5 | Booster | Hardware in production |
| Belka 20 | 20 kN | 2 | Sustainer | In work |
| Belka 10 | 10 kN | 1 | Kick | In work |
| Feed | Pressure fed |
|---|---|
| Throttling | Deep throttling capability |
| Burn duration | Long duration |
| Propellant | In work |
| Chamber pressure | In work |
| Specific impulse | In work |
| Manufacturing | Welding and additive manufacturing, in house |
| Materials and process coupons | Current gate |
|---|---|
| Single chamber hot fire | Planned |
| Cluster integration and hot fire | Planned |
| Stage-level qualification | Planned |