The I389GT (I389) is a 70% I reloadable composite motor from Gorilla.
| Average Thrust: | 383.7601 N | 
| Certified By: | Tripoli Rocketry Association | 
| Class: | 70% I | 
| Delays: | 18 seconds | 
| Designation: | I389GT | 
| Diameter: | 38.0000 mm | 
| Length: | 369.0000 mm | 
| Letter: | I | 
| Manufacturer: | Gorilla | 
| Name: | I389 | 
| Peak Thrust: | 454.8500 N | 
| Propellant: | APCP | 
| Status: | Out-Of-Production | 
| Thrust Duration: | 1.4200 s | 
| Total Impulse: | 544.9394 Ns | 
| Total Weight: | 692.8000 g | 
| Type: | Reloadable | 
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