Rocket fuel technology startup Firehawk Aerospace has added $1.2 million to its existing seed financing, bringing the full amount invested in the round to $2.5 million. The new tranche comes from Harlow Capital Management, a Dallas-based firm run by Colby Harlow, who will join Firehawks board of directors as part of the deal.

Firewhawk, which was a finalist in our first-ever all-virtual Startup Battlefield at TC Disrupt last September, has developed a new kind of hybrid rocket fuel that greatly enhances rocket launch safety, cost and transportation using additive manufacturing (basically, the grown-up version of 3D printing). Hybrid rocket fuel (which combines aspects of both liquid and solid propellants used previously) isnt new, but past technology has been unable to compete on cost and efficacy relative to existing nonhybrid alternatives.

The startups Chief Scientist Ron Jones was able to get around these limitations with two new approaches: Using a fuel with a hard polymer structure and producing it using additive manufacturing instead of casting via molds with a liquid that hardens.

Firehawk now intends to use its seed funding to test its technology in operational conditions and at the kind of scale required for commercialization, and to build out its partnerships and client list. The startup also intends to grow its R&D and manufacturing operations in both Texas and Oklahoma.

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Firehawk Aerospace extends seed funding to $2.5 million with $1.2 million from Harlow Capital - TechCrunch