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US 11,945,759 B2Granted
Hybrid rocket engine fuel grains with radial energy compositional variations
AssigneeFirehawk Aerospace, Inc.
InventorRonald D. Jones
Life of this patent
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Abstract
A method of making a fuel grain for a hybrid rocket engine includes deposing beads of fuel grain material onto mandrel using additive manufacturing to form a cylindrical fuel grain, each bead including a polymer based rocket fuel material and a nanoscale metallic material. The deposing includes deposing multiple, adjacent beads to form concentric layers of beads, wherein a composition of the beads of the fuel grain material differs between the beads of a first layer and the beads of a second layer of the fuel grain.
Claims12
A method of making a fuel grain for a hybrid rocket engine, the method comprising:
- deposing beads of fuel grain material onto an elongated mandrel using additive manufacturing to form a cylindrical fuel grain, each bead comprising a polymer based rocket fuel material and a nanoscale metallic material, the deposing comprising:
- deposing, while moving the mandrel, multiple, adjacent beads to form concentric layers of beads, wherein a composition of the beads of the fuel grain material differs between the beads of a first layer and the beads of a second layer of the fuel grain.
Dependencies are inferred from the claim text.