The objective of this SBIR Direct to Phase II topic is to utilize HLG to increase the range available in a 2.75” rocket motor and advance the Technology Readiness Level (TRL) and Manufacturing Readiness Level (MRL) of HLG technology. HLG is a propellant technology that improves total impulse in a given volume, as well as provides capability for mission flexibility. The Mk66 is a low cost 2.75” rocket motor utilizing minimum smoke propellent and is in use with unguided rockets and the Advanced Precision Kill Weapon System (APKWS II) All Up Round (AUR). Increasing the range available at an affordable cost in a Mk66 motor case is needed to pace emerging threats. Key Technology Guidelines: 1. Rocket motor case: 2.75" Mk 66 case 2. Grain design: HLG propulsion technology 3. Ballistics software: CLWire provided by the Naval Air Warfare Center Weapons Division (NAWCWD) 4. Risk posture: Low/moderate risk for non-HLG specific components 5. Total Impulse: Increase by 30% 6. Thrust Profile: Implement all-boost and boost/sustain thrust profile with performance guidelines provided by NAWCWD (Maximum Expected Operating Pressure (MEOP) and initial thrust dictated by legacy Mk 66 system) 7. Propellant: Objective: Min-Smoke, Threshold: Reduced Smoke 8. Materials: Maximize compatibility/usage of existing rocket motor materials (propellant oxidizers and binders, insulation, liners, etc.) 9. Environments: thermal (-65 °F to 160 °F) (-53.9 °C to 71.1 °C) and mechanical environments (shock/vibe) required to enter military usage. 10. Nozzle and igniter: medium risk with path towards tactical design
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