The J520F (J520) is a 1% J reloadable composite motor from KBA.
| Average Thrust: | 514.3350 N | 
| CSFM Classification: | High Power Model Rocket Motor | 
| Certified By: | Tripoli Rocketry Association | 
| Class: | 1% J | 
| Delays: | 6,10,14 seconds | 
| Designation: | J520F | 
| Diameter: | 38.0000 mm | 
| Length: | 368.0000 mm | 
| Letter: | J | 
| Manufacturer: | KBA | 
| Name: | J520 | 
| Peak Thrust: | 737.0920 N | 
| Propellant: | APCP | 
| Status: | Out-Of-Production | 
| Thrust Duration: | 1.2500 s | 
| Total Impulse: | 645.4910 Ns | 
| Total Weight: | 722.0000 g | 
| Type: | Reloadable | 
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