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Quiet supersonic X-59 jet soars over California in unofficial first test flight

NASA's X-59 quiet supersonic jet plane flew over the Southern California Desert on Tuesday, the first flight of a new experimental aircraft that is designed to break through the sound barrier while minimizing noise.

The sleek aircraft measuring less than 100 feet (30 meters), from nose to tail took off an hour after sunrise at Plant 42, a Lockheed Martin Skunk Works facility located in Palmdale. Palmdale is about 60 miles (100 kilometers) north of Los Angeles.

After a steep ascent over fields of sod just east the runway, it was observed that the plane banked to the north, on a trajectory towards Edwards Air Force Base about 12 miles away, which is where the landing was expected. A NASA chase plane was accompanying it.

As expected, the single-engine X-59 flew at subsonic speed during its first test flight.

About 200 aerospace workers, their families and friends gathered along the highway to watch the takeoff.

Candis Roussel from Lockheed Martin, in a short email, said that "the X-59 successfully finished its first flight today" and hailed this as a "significant milestone for aviation." She added that the company will provide more details later.

The X-59 is a unique experimental aircraft that can reach a cruising velocity of 925 mph (1 490 kph), also known as Mach 1.4. This speed is achieved at an altitude 55,000 feet (16 764 meters), which makes it twice as high, and 60% faster, than most airliners.

The shape of the plane is specifically designed to reduce the sonic boom that normally occurs when an aircraft breaks through the sound barrier. Instead, the plane produces a muffled'sonic thump' no louder than the slamming of a car door.

The development of low-decibel technology for supersonic flight could improve the commercial aviation service in populated areas, particularly.

Concorde supersonic aircraft started transatlantic scheduled flights in 1976 with British Airways and Air France. The plane was retired from service in 2003 because of high operating costs, limited seats and low passenger numbers after a fatal accident in July 2000 and September 11th attacks in 2001.

NASA's press materials published online last month stated that the X-59 would make its first flight as a "lower-altitude, low-speed loop of about 240 mph to check the system integration. This will kick off a phase focused on flight testing aimed at verifying the aircraft’s airworthiness, safety, and reliability."

During future test flights, the X-59 is expected to travel faster and higher, ultimately exceeding the sound speed - 761 mph (1.225 kph), at sea level.

California Manufacturers & Technology Association announced the X-59 was 2025's coolest thing made in California in their annual statewide contest earlier this month. Reporting by David Swanson, Palmdale, California. Writing and additional reporting done by Steve Gorman, Los Angeles. Editing by Howard Goller.

(source: Reuters)