Eastern Kern County-based Scaled Composites has successfully executed a low speed taxi test of the Stratolaunch aircraft, the company said Monday in a news release.
For the first time, the aircraft traveled down the runway under its own power, utilizing all six Pratt & Whitney turbofan engines.
The world's largest airplane was designed and built at Mojave Air and Space Port to develop an air launch platform to make access to space more convenient, reliable, and routine.
Saturday's initial taxi test was intended to demonstrate the fundamental ability to control the aircraft speed and direction on the runway.
Joe Sweat, project pilot, talked about what it's like to move the world’s largest aircraft.
"It was a lot less intimidating once we had it out there, in terms of how much runway we take up. From a visual standpoint, we had a lot more room than I was anticipating," he said. "Getting the airplane moving under its own power was really interesting — just seeing and feeling how the nose wheel steering reacts and how the brakes respond to the inputs."
Scaled has been working with Stratolaunch for the past five years designing, building, and testing the giant aircraft. Microsoft co-founder and founder of Stratolaunch Paul Allen financed the endeavor.
Scaled Composites is a specialty aerospace and composites development company offering design, build, and test capabilities. Founded by Burt Rutan in 1982 and located in Mojave, Scaled has averaged one first flight of a unique, new airplane per year.
The taxi test was just one of many to come before the massive twin-fuselage bird takes flight.
“Later taxi testing will include faster speeds and more challenging steering and braking tasks, all in preparation for first flight," Test Conductor Brandon Wood said in the release. "It was exciting to see this magnificent machine on the runway for the first time."
The primary purpose of this activity was to test the aircraft’s ability to steer and stop. The ground team monitored a number of systems, including steering, braking, anti-skid and telemetry. The company reported that all systems operated as anticipated.
"This was another exciting milestone for our team and the program," said George Bugg, aircraft program manager for Stratolaunch Systems Corp. "Our crew was able to demonstrate ground directional control with nose gear steering, and our brake systems were exercised successfully on the runway. Our first low speed taxi test is a very important step toward first flight. We are all proud and excited."
Since the first engine runs in September, the team has performed a series of engine tests from the newly established Stratolaunch Mission Control Center, located at its facility at the space port, Stratolaunch CEO Jean Floyd said in a separate release. Mission Control serves as the hub for testing communications and will eventually be the center of the company's aircraft and launch operations.
Once they have safely completed low-speed taxi tests, they will begin the next phase of taxi testing which will include increased speeds.