The J228 is a 74% J single-use motor from Ellis Mountain.
| Average Thrust: | 214.3480 N |
| Certified By: | Tripoli Rocketry Association |
| Class: | 74% J |
| Delays: | 6 seconds |
| Diameter: | 38.0000 mm |
| Length: | 562.0000 mm |
| Letter: | J |
| Manufacturer: | Ellis Mountain |
| Name: | J228 |
| Peak Thrust: | 665.0310 N |
| Status: | Out-Of-Production |
| Thrust Duration: | 5.2000 s |
| Total Impulse: | 1114.6100 Ns |
| Total Weight: | 839.1000 g |
| Type: | Single-Use |
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