The K678 is a 45% K unknown composite motor from Contrail.
| Average Thrust: | 660.7560 N |
| Certified By: | Tripoli Rocketry Association |
| Class: | 45% K |
| Delays: | 1000 seconds |
| Diameter: | 75.0000 mm |
| Length: | 1016.0000 mm |
| Letter: | K |
| Manufacturer: | Contrail |
| Name: | K678 |
| Peak Thrust: | 1,163.3800 N |
| Propellant: | APCP |
| Status: | In-Production |
| Thrust Duration: | 2.8000 s |
| Total Impulse: | 1850.1200 Ns |
| Total Weight: | 4050.0000 g |
| Type: | Unknown |
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