NASA’s Quiet Supersonic Jet X-59 Rolls Out

For decades, commercial air travel has been stuck under a specific speed limit. Since the retirement of the Concorde, supersonic travel over land has been banned because of the disruptive sonic booms it creates. NASA intends to change that. With the recent rollout of the X-59 aircraft, the agency is moving closer to a future where flight times are cut in half without shattering windows on the ground.

The Reveal at Skunk Works

On January 12, 2024, NASA and Lockheed Martin officially unveiled the X-59 Quesst (Quiet SuperSonic Technology) aircraft. The ceremony took place at the legendary Lockheed Martin Skunk Works facility in Palmdale, California. This facility has a history of producing some of aviation’s most advanced machinery, including the SR-71 Blackbird.

The X-59 is not a prototype for a commercial airliner you can buy a ticket for next year. Instead, it is a one-of-a-kind experimental aircraft designed for a singular purpose: to gather data. NASA needs to prove to regulators like the FAA and the International Civil Aviation Organization (ICAO) that a plane can fly faster than the speed of sound while generating a “sonic thump” rather than a sonic boom.

Engineering the "Quiet" Boom

The physics of a sonic boom are usually unavoidable. When an aircraft breaches the sound barrier (Mach 1), it pushes air molecules aside faster than they can escape. This creates shockwaves that coalesce into a loud, double-bang explosion of sound that reaches the ground.

The X-59 is engineered to prevent those shockwaves from merging.

• The Nose: The aircraft features a distinctively long, slender nose that accounts for almost a third of its total length. The nose measures 30 feet, while the total aircraft is 99.7 feet long. This shape pierces the air to separate the shockwaves.
• The Wings: The engineers mounted the engine on top of the plane and designed the wings to interact with the air in a way that keeps shockwaves distinct.
• The Sound Goal: While a Concorde generated a boom around 105 PLdB (Perceived Level decibels), the X-59 targets 75 PLdB. NASA compares this sound to a car door slamming 20 feet away or the distant rumble of thunder.

A Cockpit Without a Window

One of the most radical design choices on the X-59 is the lack of a forward-facing window. Because the nose is so long and tapered to maintain aerodynamics, a traditional windshield was impossible.

To solve this, NASA installed the eXternal Vision System (XVS). The pilot sits in a cockpit buried deep in the fuselage and looks at a 4K monitor. Two cameras mounted outside the aircraft, combined with terrain data, stitch together an augmented reality view of the world ahead. This technology essentially allows the pilot to “see” through the nose of the plane.

Key Specifications

To achieve its mission, the X-59 relies on proven hardware adapted for this specific experimental frame.

• Engine: It is powered by a single F414-GE-100 jet engine built by General Electric. This engine generates 22,000 pounds of thrust.
• Speed: The aircraft is designed to cruise at Mach 1.4, or roughly 925 mph.
• Altitude: It will fly at an altitude of 55,000 feet.
• Dimensions: It is 29.5 feet wide and just under 100 feet long.

The Mission Timeline

The rollout in early 2024 was just the start. The “Quesst” mission is broken down into three specific phases.

Phase 1: Flight Testing

Currently, the team is conducting integrated systems testing and engine runs on the ground. The first flight is anticipated later in 2024. This phase focuses entirely on safety and proving the aircraft can fly as designed. It will take place over the Edwards Air Force Base test range.

Phase 2: Acoustic Validation

Once the plane is proven airworthy, NASA will fly it over the testing range to measure the sound. They have installed thousands of sensors on the ground to capture the exact decibel levels produced when the X-59 goes supersonic. They need to verify that the “thump” is actually as quiet as their computer models predicted.

Phase 3: Community Response

This is the most critical phase, scheduled for 2025 and 2026. NASA will fly the X-59 over several selected U.S. cities (the specific locations have not yet been announced). Residents in these areas will be surveyed to see if they heard anything and how annoying they found the noise.

Why This Matters for Travelers

You cannot fly on the X-59, but its success determines if you will ever fly supersonic from New York to Los Angeles.

Current regulations ban all civil supersonic flight over land in the United States, regardless of how quiet the plane is. This ban was instituted in 1973. Consequently, companies cannot develop supersonic commercial jets for overland routes because there is no market for them.

If NASA delivers a solid database of community response to the FAA in 2027, the regulators can change the rule. The new rule would be based on a noise standard (how loud the plane is) rather than a speed limit (Mach 1). If that law changes, aerospace manufacturers will likely begin production on the next generation of fast commercial travel.

Frequently Asked Questions

How fast is the X-59? The X-59 is designed to cruise at Mach 1.4, which is approximately 925 miles per hour. This is significantly faster than standard commercial jets, which typically fly around 550 to 600 mph.

When will the X-59 fly for the first time? While the aircraft was rolled out in January 2024, the first flight is currently targeted for late 2024 following extensive ground tests and engine checks.

Will the X-59 carry passengers? No. The X-59 is a single-seat experimental aircraft. It has room only for the pilot. Its sole job is to generate data to help change aviation laws.

Why does the X-59 have no front window? The nose of the aircraft is 30 feet long and shaped like a needle to reduce air resistance and noise. This design blocks the pilot’s forward view. Instead, the pilot uses a 4K monitor connected to external cameras to see.

How loud will the X-59 be? NASA aims for a noise level of 75 PLdB. For comparison, the Concorde was over 100 PLdB. The sound of the X-59 is described as a “sonic thump” similar to a car door slamming down the street.