Motor specifications and performance data
| Manufacturer | Contrail Rockets |
| Common Name | K321 |
| Availability | regular |
| Impulse Class | K |
| Designation | K321-BG |
| Maximum Thrust | 738.0N |
| Average Thrust | 320.5N |
| Total Impulse | 1569.9Ns |
| Burn Time | 4.89s |
| Total Weight | 2043.0g |
| Length | 1220.0mm |
| Propellant Weight | 450.0g |
| Diameter | 54.0mm |
| Case | 54 48 M BG (1490CC) |
| Sparky Motor | false |
| Motor Type | hybrid |
| Delay Options | P |
Motor data sourced from ThrustCurve.org — the motor database for rocketry