— Ch. 1 · Origins And Design —
Scaled Composites Tier One.
~5 min read · Ch. 1 of 6
In April 1996, Burt Rutan conceived a program to build a reusable spacecraft capable of reaching space. Scaled Composites began preliminary development in 1999 and moved to full development by April 2001. The project required two distinct vehicles: the White Knight mothership and the SpaceShipOne craft. White Knight first flew on the 1st of August 2002, though the entire effort remained secret until later. The design concept involved air launching a three-person piloted spacecraft that climbed slightly above 50 miles using a hybrid rocket motor. After engine cutoff, the vehicle would glide back to Earth and land horizontally like an airplane. This approach avoided the need for complex landing gear or parachutes used in traditional rockets. The system relied on computational fluid dynamics rather than wind tunnel testing during its creation phase. Engineers calculated aerodynamic forces acting on the craft while accounting for control surface positions. This method produced highly accurate images of behavior even in unanticipated flight modes.
Mobile Support Infrastructure
A large road-going truck housed the mobile mission control center for Tier One operations. The vehicle bore the Scaled Composites logo but offered no other overt indication of its link to the program. Inside, computers and radio communication gear monitored telemetry data from both White Knight and SpaceShipOne. A data reduction system automatically directed radio antennas toward the craft being tracked. The system maintained a range of about 300 miles for reliable signal reception. Staff inside enjoyed a temperature-controlled atmosphere while monitoring test data. The same truck provided auxiliary environment control for the aircraft cabins themselves. Another specialized unit called MONODS handled nitrous oxide delivery via an open trailer. This trailer carried a tank capable of storing oxidizer at room temperature under pressure. Commercial suppliers delivered nitrous oxide at roughly minus 128 degrees Fahrenheit and 45 pounds per square inch. The onboard generator powered temperature controls that heated the substance before injection into the spacecraft. A separate test stand trailer replicated structural components without replicating the crew cabin. Ground-based thrust tests used a rocket nozzle with an expansion ratio of 10:1 instead of the 25:1 version used during actual flight. Data acquisition computers recorded side force, temperature, and strain experienced by components.Flight Test History
The first official flight test occurred on the 20th of May 2003 when SpaceShipOne flew as flight 01C. Months passed before the first powered attempt took place on the 17th of December 2003 designated as flight 11P. Further powered tests reached increasing altitudes until the 21st of June 2004 brought the first privately funded human spaceflight. That mission named SpaceShipOne flight 15P marked a historic milestone in aviation history. Competitive flights followed to secure the Ansari X Prize award. Flight 16P launched successfully on the 29th of September 2004 while flight 17P succeeded on the 4th of October 2004. These two consecutive victories earned the program the ten million dollar prize money. The Tier One program concluded after SpaceShipOne retired from service. Scaled Composites transitioned resources toward developing successor technology for Virgin Galactic. Public announcements came much later than initial development phases began. The program remained secret even after White Knight achieved its maiden flight over a year earlier. Media interest surged once officials decided to reveal details publicly on the 18th of April 2003.