The J425 is a 6% J single-use motor from Aerotech.
| Average Thrust: | 412.9472 N |
| Certified By: | Tripoli Rocketry Association |
| Class: | 6% J |
| Delays: | 14 seconds (variable) |
| Diameter: | 38.0000 mm |
| Length: | 356.4000 mm |
| Letter: | J |
| Manufacturer: | Aerotech |
| Name: | J425R |
| Peak Thrust: | 452.8510 N |
| Status: | In-Production |
| Thrust Duration: | 1.6480 s |
| Total Impulse: | 680.5370 Ns |
| Total Weight: | 631.0000 g |
| Type: | Single-Use |
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