The J401FJ (J401) is a 71% J unknown motor from Aerotech.
| Average Thrust: | 392.8531 N | 
| Certified By: | Tripoli Rocketry Association | 
| Class: | 71% J | 
| Delays: | 6,10,14,18 seconds | 
| Designation: | J401FJ | 
| Diameter: | 54.0000 mm | 
| Length: | 325.0000 mm | 
| Letter: | J | 
| Manufacturer: | Aerotech | 
| Name: | J401 | 
| Peak Thrust: | 488.1020 N | 
| Status: | In-Production | 
| Thrust Duration: | 2.7830 s | 
| Total Impulse: | 1093.3103 Ns | 
| Total Weight: | 912.0000 g | 
| Type: | Unknown | 
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