This is stated on the company's website.
“Stratolaunch LLC is pleased to announce the successful completion of the first controlled flight of the Talon-A test aircraft, TA-1,” the statement said.
It is clarified that the main objectives of the test included the safe descent of the device from the air, ignition of the engine, acceleration, stable climb and controlled landing on water.
On February 16, the project manager of the Foundation for Advanced Research (APF), Grigory Makeich, announced that the Russian heavy transport unmanned aerial vehicle of the ultra-short takeoff and landing “Partizan” conducted its first flight.