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t/Space Drop Tests New Booster Design.

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Proteus aircraft.
t/Space's new booster design drop tested by Scaled Composite's Proteus aircraft. Image credit: t/Space.

Transformational Space Corp. successfully tested a scale model of its new booster design that should make launching humans into space less expensive and safer. A 1/5th scale mockup of the booster was flown aloft by Scaled Composite's Proteus aircraft and then dropped. The booster tilts itself vertically in midair so that it's pointing upward, without requiring any kind of wings. t/Space is one of eight companies chosen by NASA to develop techologies for the Crew Exploration Vehicle, which will return humans to the Moon as early as 2015.

Three weeks of flight tests over the Mojave desert have demonstrated a breakthrough in how to safely launch future passenger-carrying rockets using a carrier aircraft.

Transformational Space Corp. (t/Space) and Burt Rutan's Scaled Composites drop-tested dummy boosters from an aircraft using a technique that caused them to rotate towards vertical without requiring wings. This allows an aft-crossing trajectory in which the rocket crosses behind the aircraft, greatly enhancing safety. Previous air-launched rockets such as the X-15, Pegasus and SpaceShipOne crossed in front of the carrier aircraft using wings to turn themselves from horizontal flight to the vertical position needed to achieve orbit. In addition to greatly enhancing safety, eliminating the weight of wings increase the payload the rocket can take to orbit.

The innovation developed by t/Space is a special mechanism that holds on to the nose of the booster for about a half-second after the center of the rocket is released. This slight tug on the nose starts the booster rotating as it drops. A small parachute on the rocket's nozzle ensures the rotation happens slowly.

The dummy booster dropped today was the third and final in the t/Space program, with previous drops on May 24 and June 7. All test articles dropped were inert - two steel tanks welded together with a Fiberglas nose and nozzle. They were 23% of the size of the actual rockets to be developed for sending a four-person capsule into orbit. Since they had no engines, each eventually crashed onto the dry Cuddeback Lake, about 35 miles northeast of Mojave, CA. The wreckage was collected and removed.

t/Space is one of eight companies funded by NASA's Exploration Systems Mission Directorate to develop concepts for the agency's Crew Exploration Vehicle (CEV) that will take over non-cargo duties from the Space Shuttle. NASA agreed to let t/Space use some of its $3 million second-phase study money to build and test hardware in addition to conducting analytical studies. The successful drop test program shows that small companies using rapid prototyping can deliver new hardware very rapidly.

"We went from brainstorm to booster drop in just 135 days," said David Gump, president of t/Space. "Program manager Marti Sarigul-Klijn proved that his computer simulations were dead-on correct each time the aircraft dropped the dummy booster."

Bob Morgan managed the Scaled Composites side of the test program that demonstrated the new air launch method, called Trapeze-Lanyard Air Drop (t/LAD) launch. This approach greatly improves simplicity, safety, cost, and reliability of launching personnel into low Earth orbit.

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