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Parallel Flight Technologies is collaborating with Alpha Unmanned Systems to advance heavy-fuel propulsion technologies for the Firefly UAS, supporting the U.S. Office of Naval Research. The project focuses on adapting the Firefly to operate on heavy fuel, enabling long-endurance and heavy-lift capabilities in naval and expeditionary environments.

The Firefly UAS can carry payloads of up to 100 lb (45 kg) with endurance significantly exceeding all-electric UAS. The partnership aims to enhance operational flexibility and reduce logistical burdens for unmanned systems in demanding conditions.