- SpaceShipOne flight 15P
Infobox Space mission
mission_name = Flight 15P
insignia =
spacecraft_name =SpaceShipOne
booster = White Knight
sign = SpaceShipOne
crew_members =Mike Melvill (Pilot)
launch_pad = White Knight
launch =June 21 ,2004 , 14:50 UTC, Mojave, CA
landing =June 21 ,2004 , 15:14 UTC,Mojave Airport & Spaceport
duration = 24 min
orbits = Suborbital
apogee = convert|100.124|km|mi|lk=on
distance = convert|35|km|mi
sso_burn = 76 sec
maxvel = 961 m/s Mach 2.9
peakdec = 49 m/s² 5 g
mass = Launch: convert|3600|kg|lb|lk=on Burnout: convert|1200|kg|lb
previous = Flight 14P
next = Flight 16PFlight 15P of SpaceShipOne was the first privately-funded
human spaceflight . It took place onJune 21 2004 . It was the fourth powered test flight of theTier One program, the previous three test flights having reached much lower altitudes. The flight carried only its pilot,Mike Melvill , who thus became the first non-governmentalastronaut .This flight was a full-altitude test, but not itself a competitive flight, for the
Ansari X Prize , the prize for the first non-governmental reusable manned spacecraft. Problems were encountered during the flight, but later corrected, paving the way for SpaceShipOne to make competitive flights later in 2004.Flight profile
All times are in PDT, which is seven hours behind
UTC . This was the local civil time at the spaceport on the day of the flight. All measurements are first stated in the U.S. customary units in which they were originally reported, with conversions toSI units also given.Taxiing for takeoff from Mojave Spaceport was originally planned for 06:30, because the wind conditions in that area are most favourable in the early morning. Taxiing actually started at 06:37, and the flight took off at 06:47. After an ascent to 47,000 feet (14.3 km) coupled with the White Knight airplane, the SpaceShipOne craft separated at 07:50 and immediately ignited its
rocket .Shortly after ignition, at about 60,000 feet (18 km), the craft unexpectedly rolled 90 degrees to the left, due to wind shear. When the pilot attempted to correct it, it rolled 90 degrees to the right. The pilot levelled the craft out, and proceeded with the climb. The correction of the roll excursion, using full trim, caused a pitch trim tab to run up against a stop. This caused the trim actuator, as designed, to stop operating for a 3 s timeout. Not realising what had happened, the pilot and controllers interpreted this as failure of the trim actuator, and they switched to a backup system. Spacecraft attitude was problematic during the entire climb, and not corrected until the start of re-entry.
During the burn, a new aerodynamic fairing installed around the rocket nozzle overheated, became too soft, and crumpled inwards. This caused a loud bang, which the pilot reported, but did not cause a flight problem.
The rocket burn lasted for 76
second s. At burn-out the altitude was 180,000 feet (54.9 km), theMach number was 2.9, and the speed was 2150mph (3460km/h ; 961m/s ).The planned
apogee altitude was 360,000 feet (110 km), but due to the attitude problem encountered during the climb the craft actually attained only 328,491 feet (100,124 m). In doing so it passed theboundary to space at 100 km, making the flight, as planned, officially aspaceflight . It can be calculated that the altitude exceeded 100 km for approximately 10.23 s.Around apogee the craft experienced about 3 1/2
minute s ofweightlessness . PilotMike Melvill opened a bag ofM&M's and watched them float around the capsule in free-fall.The craft re-entered the atmosphere 22
mile s (35 km)south of its planned 5 by 5 mile (8 by 8 km) re-entry zone. The pilot finally corrected the spacecraft attitude at this point, using a backup trim system. The craft reached Mach 2.9 and experienced deceleration of 5.0 "g" (49 m/s²) during descent. The craft switched to gliding configuration at an altitude of 57,000 feet (17.4 km), then returned to the spaceport and landed safely at 08:14.pectacle
Scaled Composites , the makers of SpaceShipOne, announced the planned spaceflight onJune 2 2004 , and invited the public to watch. An estimated 11,000 people went to Mojave Spaceport to watch the flight, and millions more watched on television. Distinguished attendees included former astronautBuzz Aldrin and the Commanding Officer ofEdwards Air Force Base .Because SpaceShipOne launches to the
east of Mojave Spaceport early in the morning, the crowd at the spaceport found themselves looking into thesun when watching the aircraft. Nevertheless, the crowd was exuberant, cheering every milestone in the flight, including the double sonic boom following the thrust phase. After SpaceShipOne landed, White Knight and the chase planes made celebratory passes over the runway. Mike Melvill displayed great excitement, waving to the crowd while standing on top of SpaceShipOne. He also held up a sign reading "SpaceShipOne, GovernmentZero," given to him by a spectator. Melvill was greeted byBuzz Aldrin , the second person to have walked on theMoon .Reactions
NASA administratorSean O'Keefe issued a statement about the flight, saying::We applaud the remarkable achievement of
Burt Rutan ,Paul Allen and test pilotMike Melvill following the first successful suborbital flight of SpaceShipOne. Not unlike the first U.S. and Soviet space travelers in 1961, and China's first successful spaceflight this year, these private citizens are pioneers in their own right. They are doing much to open the door to a new marketplace offering the experience ofweightlessness andsuborbital space flight to the public. We congratulate the SpaceShipOne team and wish all those who may follow safe flights.The
X Prize Foundation issued a press release about the flight::We congratulate the entire Scaled Composites' team, in particular Burt Rutan and Mike Melvill for achieving this tremendous milestone. We also thank Paul Allen for his willingness to help open this critical, but risky frontier. The entire X PRIZE organization looks forward to receiving Scaled Composites' 60-day notice indicating they are ready to make their attempt to win the $10 million purse. Once such notice is received, we will make the information publicly available.
The
Federal Aviation Administration presented Melvill with astronaut wings in a ceremony at 10:22, two hours after landing.Relation to the
Ansari X Prize As intended, the flight exceeded the 100 km threshold required for the X PRIZE. However, the flight was not intended as an X PRIZE competitive flight, and was not registered as such.
The flight did not carry any passengers, or equivalent ballast, as required for an X PRIZE flight, and so could not qualify as a competitive flight. Furthermore, the X PRIZE rules require a repeat flight within two weeks, which the
Scaled Composites team had no intention of making.Flight 15P was intended to be the final test flight before making the two X PRIZE flights later in 2004. Due to the problems encountered on this flight it was thought that an additional test flight might be needed. However, by
July 7 2004 Burt Rutan reported that the faults had been resolved and the next flights would be competitive.ee also
*
Virgin Galactic
*SpaceShipTwo External links
* [http://www.scaled.com/projects/tierone/june21faq.htm Scaled Composites FAQ on June 21 launch]
* [http://www.space.com/missionlaunches/SS1_press_040621.html SPACE.com article about the flight]
* [http://www.spaceflightnow.com/ss1/status2.html Spaceflight Now contemporaneous report]
* [http://www.spaceflightnow.com/ss1/040621launch.html Spaceflight Now full report]
* [http://www.newscientist.com/news/news.jsp?id=ns99996052 " 'Anomalies' in first private spaceflight revealed", New Scientist]
* [http://scaled.com/projects/tierone/logs-WK-SS1.htm Scaled Composites' public flight log]
* [http://www.xprize.com/press/release_057.html Competing ANSARI X PRIZE team makes milestone achievement in Mojave] - press release from theX PRIZE Foundation
* [http://www.scaled.com/projects/tierone/062104-2.htm SpaceShipOne Makes History: First Private Manned Mission to Space] - press release fromScaled Composites
* [http://www.nasa.gov/home/hqnews/2004/jun/HQ_04199_ok_spaceship1.html NASA Administrator Lauds Successful Human Space Flight] - press release from NASA
* [http://starfighter.blogspot.com/2004/07/more-x-prize-news.html More X-Prize News] from Starfighter's Model Blog
* [http://spaceshipone.airshowjournal.com/2004/ Space Ship One's First Flight into Space] - images of the flight, from Fred's Air Show Journal
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