The J420R (J420) is a 2% J reloadable composite motor from Aerotech.
This reload fits an RMS 38/720 motor case.
Aerotech's Redline propellant provides a vivid scarlet flame. Redline's burning rate lies midway between that of White Lightning and Blue Thunder.
| Average Thrust: | 404.3348 N | 
| Casing: | RMS 38/720 | 
| Certified By: | Tripoli Rocketry Association | 
| Class: | 2% J | 
| Delays: | 6,10,14 seconds | 
| Designation: | J420R | 
| Diameter: | 38.0000 mm | 
| Formula: | Redline | 
| Length: | 337.0000 mm | 
| Letter: | J | 
| Manufacturer: | Aerotech | 
| Name: | J420 | 
| Peak Thrust: | 563.4700 N | 
| Propellant: | APCP | 
| Status: | In-Production | 
| Thrust Duration: | 1.6100 s | 
| Total Impulse: | 650.9790 Ns | 
| Total Weight: | 659.0000 g | 
| Type: | Reloadable | 
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