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- From: cohen@ssdgwy.mdc.com (Andy Cohen)
- Newsgroups: sci.space
- Subject: A DC-X article from MDA
- Followup-To: sci.space
- Date: 17 Sep 1993 15:37:56 GMT
- Organization: MDA-W, SSD
- Lines: 80
- Message-ID: <cohen-170993084030@q5022531.mdc.com>
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-
- A first in rocket history DELTA CLIPPER-EXPERIMENTAL (DC-X) LANDS
- VERTICALLY
-
- By Anne McCauley and Kerry Veale
-
- It's the first time anyone has ever landed a rocket vertically on Earth,"
- says Paul Klevatt, McDonnell Douglas DC-X program manager. "We all held our
- breath during the flight, but the DC-X did exactly what we designed it to
- do."
-
- Developed for the Ballistic Missile Defense Organization (BMDO) Single
- Stage Rocket Technology Program, the DC-X is an experimental single stage,
- vertical takeoff and landing vehicle.
-
- On Aug. 18, the DC-X took off at 4:43 p.m. MDT and vertically hovered at
- 150 feet. Remaining in a vertical position, the vehicle moved in a straight
- line 350 feet and descended vertically, touching down on the landing pad.
- The entire flight lasted 60 seconds.
-
- Col. Worden, the BMDO deputy for technology, compares the hover test to "a
- high speed taxi test of a conventional aircraft."
-
- Klevatt says that the hover test demonstrates that the DC-X guidance,
- navigation and control systems are ready for the flight test series, which
- will gradually expand the DC-X's flight envelope according to standard
- aircraft flight test practices.
-
- In the hover test, one side of the fiberglass nose cone was scorched. It
- has been replaced with a new nose cone which is being coated with the same
- insulation as the sides of the rocket.
-
- The next test will start the flight envelope expansion program. In this
- first series the DC-X will demonstrate flight controllability and overall
- system performance including vertical liftoff to an altitude of 300 feet,
- horizontal movement 350 feet uprange, and vertical landing. Altitudes and
- duration of flight will be continue to be expanded during the next several
- months of testing.
-
- More than 50 McDonnell Douglas employees work on the DC-X program at four
- locations: Huntington Beach, Calif., White Sands Missile Range, N. M., St.
- Louis, Mo., and Kennedy Space Center, Fla. At White Sands, the team lives
- in Las Cruces and commutes 65 miles across the white gypsum sands to the
- test facility. They meet to carpool at 4:30 a.m., and every day starts with
- a team meeting at 5:45 a.m. Normal daily temperatures frequently reach 110
- degrees. Gerry Coleman, MDA's ground support manager, handed out red socks
- to the flight crew before the hover test. The tradition of wearing red for
- launches dates back to the first Thor rockets launched in the late 1950s.
- 'They╒re not superstitious, but why take chances?" he says. 'They╒re highly
- technical engineers, but it's fun for the team." Before the hover test, the
- DC-X vehicle and ground support systems underwent an extensive set of
- propellant loading tests and 235 seconds of cumulative hot fire tests at
- NASA's White Sands Test Facility (WSTF) and the U.S. Army's White Sands
- Missile Range (WSMR). These tests are intended to demonstrate that a
- rocket-powered reusable launch vehicle can be operated and maintained in a
- manner similar to aircraft. "So far at WSMR, with the vehicle and ground
- support system in flight configuration, we conducted two major hot fire
- engine tests and now the hover test, all in a period of ten days," says
- Pete Conrad, the McDonnell Douglas Flight manager. "With the ground and
- hover testing we've completed up to this point, we've met over 60 percent
- of the critical test objectives that the program set out to demonstrate,
- including the ability for a spacecraft to be operated like an aircraft.
- "The ground-based flight crew is now ready to begin flight testing,
- cautiously at first, then aggressively as we begin pushing the flight
- envelope," Conrad says. What's in the future for SSRT? Dr. Bill Gaubatz,
- director of SSTO programs, explains that the SSRT Program and the DC-X are
- the first in a series of Advanced Technology Demonstrators leading to an
- operational DC-l around the turn of the century. "The DC-X is proving that
- a spacecraft can be designed and operated with the cost effectiveness and
- safety of an aircraft as well as the flight characteristics of a vertical
- takeoff and vertical landing vehicle," says Gaubatz. The next step would be
- a three year program for building and flying a DC-X2 vehicle- about twice
- the size of the present DC-X╤to altitudes of 100 miles or more to answer
- engineering, manufacturing and operations questions for the final
- development of an orbital vehicle. The DC-X2 would be followed by a four
- year program to develop and flight test the orbital prototype vehicle, the
- DC-Y. The DC-Y would begin test flights to and from space in the summer of
- 2000 followed by a certification process to provide a fleet of operational
- DC-X by the year 2002. Proposed legislation requests $75 million in 1994 to
- start the competitive follow-on program for the DC-X 2; it is anticipated
- that this new program could be underway by the first of the year.
-