If you were casually strolling through the Mojave desert, a vast and arid area in southern California, on Friday the 13th, you may have enjoyed what is probably one of the most impressive spectacles in modern aviation: a test flight of the gigantic Scaled Composites Model 351 Stratoulanch, better known as the Stratoulanch Roc. And given its dimensions, gigantic is far from being an exaggeration: it reaches a wingspan of 117 meters, more than other titans of the skies, such as the Antonov An-225 Mriya or Hughes H-4 Hercules. To provide another reference, it is close to the 120 meters allowed as the maximum length for a soccer field.
Although it turns out to be a engineering show and boast, the January test flight of the Stratoulanch Roc is nothing new. In fact, with him there are already nine. What really makes it unique is that it has allowed it to break its own operational record, exceeding six hours in the air and moving beyond Mojave for the first time. Along with him, Roc also carried the TA-0 test aircraft. Beyond setting a new record in the air, the operation takes another step on Stratolaunch’s path towards its great goal: the launch of hypersonic aircraft.
Roc took off from the Mojave Air and Space Port on Friday the 13th and —Space.com specifies— it landed at the same terminal after six hours of flight. During its operation it reached an altitude of around 22,500 feet, equivalent to 6,858 meters. “The main objectives of the test included the flight outside the local Mojave area for the first time and the evaluation of the separation environment,” the company details in a statement in which it celebrates the success of the maneuver.
A titan of the skies with a clear objective
Both Roc and the TA-0 test vehicle it carried took advantage of the experiment to gather “critical information” on issues such as downforce which will now help the company move forward in its review phase. Once reviewed, Stratolaunch will continue towards its goal: achieving its first hypersonic TA-1 flight during the first half of 2023.
Because Roc is not just any plane. By dimensions. And for focus.
First of all, your business card is impressive: 117 meter wingspan and 73 in length, six Pratt & Whitney PW4056 engines —those used by the Boeing 747-400— and a payload of 226,800 kilos. Regarding its approach, the Stratolaunch aircraft stands out for its potential as a launch platform for hypersonic vehicles. In May, it actually carried out its fifth experimental flight, in which it already incorporated its “pylon”, the structure that will allow it to load and then launch vehicles. So Roc flew for just under five hours, away from his new mark.
Those responsible for Roc raise it in fact as a hypersonic technology accelerator. As we already told you at the time, he has prepared autonomous Talon-A rockets designed to take advantage of their launch potential. The goal: move loads at a speed of Mach 6, more than 7,000 kilometers per hour (km/h). To test its technology and possibilities, the firm has been carrying out a series of tests for some time, including the flight of the past 13.
Roc completed its flight at 2:51 p.m. setting a new record for the longest flight to date at six hours and marking our first time flying outside of the Mojave range! pic.twitter.com/w3FaG9ABkV
— Stratolaunch (@Stratolaunch) January 13, 2023
A couple of months ago, in November, its managers already tested Roc’s “pylon” with the TA-0, a version of the Talon-A designed precisely to test all systems. Although the altitude that he reached then is very similar to what he has achieved now, from around 7,000 metersthe duration of the flight was much shorter: it lasted just over five hours.
“We have built confidence that the components will perform exactly what they were designed to do,” the company explained. At the moment, yes, the operations are carried out as “captive transport” with the TA-0 test vehicle, mounted on the Roc itself.
“A review of the flight data will determine the next steps in the test schedule. Stratolaunch continues to advance towards the separation test and its first hypersonic flight of the TA-1 in the first half of 2023 ”, the company now states. The objective, he clarifies, is to achieve a launch system from an airplane that allows technical and logistical barriers to be eliminated.
Top image: Gauntlet Aerospace / Christian Turner
