SpaceShipOne Flight 15P
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Flight 15P of
SpaceShipOne SpaceShipOne is an experimental air launch, air-launched rocket-powered aircraft with sub-orbital spaceflight capability at speeds of up to / using a hybrid rocket motor. The design features a unique "Feathering (reentry), feathering" atmosph ...
(X0) was the first privately funded
human spaceflight Human spaceflight (also referred to as manned spaceflight or crewed spaceflight) is spaceflight with a crew or passengers aboard a spacecraft, often with the spacecraft being operated directly by the onboard human crew. Spacecraft can also be ...
. It took place on June 21, 2004. It was the fourth powered test flight of the Tier One program, with the previous three test flights reaching much lower altitudes. The flight carried only its
pilot An aircraft pilot or aviator is a person who controls the flight of an aircraft by operating its Aircraft flight control system, directional flight controls. Some other aircrew, aircrew members, such as navigators or flight engineers, are al ...
,
Mike Melvill Michael Winston Melvill (born November 30, 1940, in Johannesburg, South Africa) is a world-record-breaking pilot and one of the test pilots for SpaceShipOne, the experimental spaceplane developed by Scaled Composites. Melvill piloted SpaceShip ...
, who thus became the first non-governmental
astronaut An astronaut (from the Ancient Greek (), meaning 'star', and (), meaning 'sailor') is a person trained, equipped, and deployed by a List of human spaceflight programs, human spaceflight program to serve as a commander or crew member of a spa ...
. 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 crewed spacecraft. Problems were encountered during the flight but later corrected, paving the way for SpaceShipOne to make competitive flights later in 2004.


Crew


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 to SI units also given. Taxiing for takeoff from
Mojave Spaceport The Mojave Air and Space Port at Rutan Field is in Mojave, California, United States, at an elevation of . It is the first facility to be licensed in the United States for horizontal launches of reusable spacecraft, being certified as a spa ...
was originally planned for 06:30, because the wind conditions in that area are most favorable 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 A white knight is a mythological figure and literary stock character. They are portrayed alongside a black knight as diametric opposites. A white knight usually represents a heroic warrior fighting against evil, with the role in medieval literatu ...
airplane, the SpaceShipOne craft separated at 07:50 and immediately ignited its
rocket A rocket (from , and so named for its shape) is a vehicle that uses jet propulsion to accelerate without using any surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely ...
. 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 leveled 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 realizing what had happened, the pilot and controllers interpreted this as a failure of the trim actuator, and they switched to a backup system. Spacecraft
attitude Attitude or Attitude may refer to: Philosophy and psychology * Attitude (psychology), a disposition or state of mind ** Attitude change * Propositional attitude, a mental state held towards a proposition Science and technology * Orientation ...
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 seconds. At burn-out the altitude was 180,000 feet (54.9 km), the
Mach number The Mach number (M or Ma), often only Mach, (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Erns ...
was 2.9, and the speed was 2150 mph (3460 km/h; 961 m/s). The planned
apogee An apsis (; ) is the farthest or nearest point in the orbit of a planetary body about its primary body. The line of apsides (also called apse line, or major axis of the orbit) is the line connecting the two extreme values. Apsides perta ...
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 the boundary to space at 100 km, making the flight, as planned, officially a
spaceflight Spaceflight (or space flight) is an application of astronautics to fly objects, usually spacecraft, into or through outer space, either with or without humans on board. Most spaceflight is uncrewed and conducted mainly with spacecraft such ...
. It can be calculated that the altitude exceeded 100 km for approximately 10.23 s. Around apogee the craft experienced about 3 minutes of
weightlessness Weightlessness is the complete or near-complete absence of the sensation of weight, i.e., zero apparent weight. It is also termed zero g-force, or zero-g (named after the g-force) or, incorrectly, zero gravity. Weight is a measurement of the fo ...
. Pilot Mike Melvill opened a bag of M&M's and watched them float around the capsule in free fall. The craft re-entered the atmosphere 22 miles (35 km) south of its planned 5 by 5-mile (8 by 8 km) re-entry zone. The pilot finally corrected the spacecraft's 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.


Spectacle

Scaled Composites Scaled Composites (often called simply Scaled) is an American aerospace company founded by Burt Rutan and currently owned by Northrop Grumman. It is located at the Mojave Air and Space Port in Mojave, California, United States. Founded to d ...
, the makers of SpaceShipOne, announced the planned spaceflight on June 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 astronaut
Buzz Aldrin Buzz Aldrin ( ; born Edwin Eugene Aldrin Jr.; January 20, 1930) is an American former astronaut, engineer and fighter pilot. He made three extravehicular activity, spacewalks as pilot of the 1966 Gemini 12 mission, and was the Lunar Module Eag ...
and the
Commanding officer The commanding officer (CO) or commander, or sometimes, if the incumbent is a general officer, commanding general (CG), is the officer in command of a military unit. The commanding officer has ultimate authority over the unit, and is usually give ...
of
Edwards Air Force Base Edwards Air Force Base (AFB) is a United States Air Force installation in California. Most of the base sits in Kern County, California, Kern County, but its eastern end is in San Bernardino County, California, San Bernardino County and a souther ...
. Because SpaceShipOne launches to the east of
Mojave Spaceport The Mojave Air and Space Port at Rutan Field is in Mojave, California, United States, at an elevation of . It is the first facility to be licensed in the United States for horizontal launches of reusable spacecraft, being certified as a spa ...
early in the morning, the crowd at the spaceport found themselves looking into the
sun The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light a ...
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 - an apparent reference to the then-ongoing suspension of Space Shuttle flight operations following the loss of the
Space Shuttle Columbia Space Shuttle ''Columbia'' (OV-102) was a Space Shuttle orbiter manufactured by Rockwell International and operated by NASA. Named after the Columbia Rediviva, first American ship to circumnavigate the globe, and the Columbia (personification) ...
during STS-107. Melvill was greeted by Buzz Aldrin, the second person to have walked on the
Moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...
.


Reactions

NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...
administrator Sean O'Keefe issued a statement about the flight, saying: The X Prize Foundation issued a press release about the flight: The
Federal Aviation Administration The Federal Aviation Administration (FAA) is a Federal government of the United States, U.S. federal government agency within the United States Department of Transportation, U.S. Department of Transportation that regulates civil aviation in t ...
presented Melvill with
astronaut wings United States astronaut badges are the various badges of the United States which are awarded to military and civilian personnel of the National Aeronautics and Space Administration, the various child departments of the Department of Defense, or ...
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, 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.


See also

*
SpaceShipTwo The Scaled Composites Model 339 SpaceShipTwo (SS2) was an air-launched suborbital spaceplane type designed for space tourism. It was manufactured by The Spaceship Company, a California-based company owned by Virgin Galactic. SpaceShipTwo was ...
* Timeline of private spaceflight *
Virgin Galactic Virgin Galactic Holdings, Inc. is a British-American spaceflight company founded by Richard Branson and the Virgin Group conglomerate, which retains an 11.9% stake through Virgin Investments Limited. It is headquartered in California, and opera ...


References


Further reading

*


External links


'' 'Anomalies' in first private spaceflight revealed'', New Scientist


from Starfighter's Model Blog




Space Ship One's First Flight into Space
– images of the flight, from Fred's Air Show Journal



{{Scaled Composites 2004 in spaceflight Scaled Composites Tier One program SpaceShipOne Suborbital human spaceflights Private space missions