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Hybrid Air-Rocket Concept Touted For Rapid Launch

Hybrid Air-Rocket Concept Touted For Rapid Launch
Northrop Grumman is addressing U.S. Air Force requirements for responsive space access by developing a rapid-turnaround launch system that combines a reusable first stage with expendable upper stages. Launched vertically, the hybrid launch vehicle's winged first stage boosts the upper stages to speeds approaching Mach 7 before releasing them at an altitude of approximately 150,000 feet. The first stage then flies back to its home based like an unmanned aerial vehicle. Image
(Image: © Northrop Grumman Corp.)

COLORADOSPRINGS, Colorado - A rapid-turnaround launch system capable of hurlingsatellites or special purpose payloads into Earth orbit in as little as 48hours is being touted by a major aerospace firm--Northrop Grumman Corporation.

The newconcept is being competed in a U.S. Air Force effort to develop quick launch ofspace hardware.

NorthropGrumman's idea is dubbed the Hybrid Launch Vehicle (HLV), dedicated to reducinglaunch costs by approximately two-thirds compared to the cost of using a mediumevolved expendable launch vehicle.

In astatement released today here at the National Space Symposium, Northrop Grummanofficials said the idea combines a reusable, airplane-like first stage withthrow-away upper stages. Launched vertically, the vehicle's winged first stageboosts the upper stages to speeds approaching seven times the speed of sound(Mach 7) before releasing them at an altitude of approximately 150,000 feet.

The upperstages then boost the satellite payload to orbit or deliver a conventionalweapon to a distant target, according to the press statement. Meanwhile, thefirst stage flies back and lands at its home base like an autonomous, unmannedaircraft. The first stage of the HLV will use a rocket engine during the boostportion of its mission, and an integrated set of air-breathing jet engines forits return flight.

Subscaledemonstrator

NorthropGrumman said it is defining the architecture for an operational version of thishybrid launch system under a 20-month, $3.0 million studies and analysiscontract with the Air Force's Space & Missile Systems Center, Los AngelesAir Force Base.

Thecontract includes a base amount of $1.5 million over 14 months, with an optionfor an additional $1.5 million over an additional six months.

Under thecontract, the company will also define a concept for a subscale demonstratorversion of the launch system, and the infrastructure required to execute ademonstration program. The subscale launch system, if developed, would be usedto demonstrate the technologies, processes and key attributes of an operationalsystem.

The currentstudies and analysis contract is the first step in a process that could leadultimately to the selection of two contractor teams to develop preliminarydesigns for the HLV.

At the endof the design competition, the Air Force may select a single contractor team todevelop and produce the HLV - Subscale Demonstration system, the NorthropGrumman statement pointed out.

"The HLVconcept offers the Defense Department a relatively simple, affordable way toput standardized, tactical satellites into orbit quickly after receiving arequest for support," explains Dennis Poulos, Northrop Grumman's HLV projectmanager.

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