The K400S (K400) is a 7% K reloadable composite motor from KBA.
| Average Thrust: | 354.9535 N |
| Certified By: | Tripoli Rocketry Association |
| Class: | 7% K |
| Delays: | 6,10,14 seconds |
| Designation: | K400S |
| Diameter: | 54.0000 mm |
| Length: | 403.0000 mm |
| Letter: | K |
| Manufacturer: | KBA |
| Name: | K400 |
| Peak Thrust: | 465.9280 N |
| Propellant: | APCP |
| Status: | Out-Of-Production |
| Thrust Duration: | 3.8700 s |
| Total Impulse: | 1373.6700 Ns |
| Total Weight: | 1509.3100 g |
| Type: | Reloadable |
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