The phrase "as test flights" is correct and usable in written English.
It can be used when referring to activities or operations that are conducted in a manner similar to test flights, often in the context of experimentation or evaluation.
Example: "The new drone was evaluated as test flights were conducted over various terrains to assess its performance."
Alternatives: "like test flights" or "similar to test flights".
AS TEST flights go, FTG-06b was a dazzling affair.
According to the NY Times it's not unreasonable to lose single-use rocket vehicles in the early stages of development, as test flights are not possible.
Designed around the Boeing X-45, this UAV recently flew to 7,500 feet at 204 mph and has been spotted making flights in Afghanistan as well as test flights at Edwards AFB.
The company has already earned $500 million in milestone payments from NASA as it successfully completed design reviews as well as safety and test flights using the crewed Dream Chaser (which shares 80% of the same design and features) before it was retired.
Furthermore, NASA is counting on Elon Musk's company to fly astronauts to the International Space Station, with test flights as early as this year.
The engine might be used to power a plane like the 767X, Boeing's latest design, which could begin test flights as early as 1994 and is waiting for its first customer.
The addition of grid fins, with continuation of the control authority obtained from gimbaling the engines as on previous test flights, are projected to improve the landing accuracy to 10 m; the landing accuracy on the previous four controlled-descent test flights was only 10 km.
Initial test flights could occur as early as next year.
"They got confused," Mr. Monteleon said in a recent interview, as he recalled the test flights in January 2008.
The A380 is on a brief tour around America as it continues with test flights and edges gradually towards final certification.
The Atlantic, which was given exclusive access to the project, said that Google has conducted at least 30 test flights as part of Project Wing.
