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X-47A Pegasus

UAV · USA · Modern (1992–2009)

X-47A Pegasus — UAV
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The Northrop Grumman X-47A Pegasus was an American single-engine, jet-powered, low-observable unmanned-combat-air-vehicle (UCAV) testbed. Northrop Grumman built it as a private-venture proof of concept for carrier-capable stealth UCAVs. First flown in February 2003, the X-47A preceded the larger Northrop Grumman X-47B Pegasus — the aircraft that went on to demonstrate carrier-based unmanned launch and recovery in 2013. As a privately funded technology demonstrator, the X-47A established Northrop Grumman's credentials in stealth-UCAV development and supplied foundational technology for the X-47B and successor programmes.

Configured as a tailless lambda-wing low-observable airframe, the X-47A measures 27 ft (8.2 m) long with a 28 ft (8.5 m) wingspan. Empty weight is 3,700 lb and maximum take-off weight 5,500 lb. A single Pratt & Whitney Canada JT15D-5C turbofan provides 3,200 lbf thrust, giving a top speed of 460 mph (Mach 0.7) and a service ceiling above 35,000 ft. At roughly 1/3 scale of the later X-47B, the airframe was sized to explore carrier-deck operations, autonomous flight control, and low-observable shaping compatible with carrier launch and recovery.

Technology demonstration was the X-47A's principal mission — exploring carrier-capable UCAV concepts. Test objectives included autonomous flight in a military lambda-wing tailless configuration, autonomous launch, approach and landing, and integration with carrier-deck operations as the long-term goal. Frontline service was never the intent. The X-47A existed to validate the basic premise that a low-observable UCAV could operate from U.S. Navy aircraft carriers, opening the path for the X-47B's larger flight-test programme.

The U.S. Navy / DARPA Joint Unmanned Combat Air System (J-UCAS) programme began in 2003, the same year as the X-47A's first flight on 22 February 2003. J-UCAS was cancelled in 2006 after the U.S. Air Force and U.S. Navy could not reconcile programme priorities. The Navy continued under UCAS-D (Unmanned Combat Air System Demonstration), selecting Northrop Grumman's larger X-47B as the follow-on testbed. The X-47A flew 4–5 development sorties between 2003 and the 2006 cancellation. The sole prototype is preserved at the National Naval Aviation Museum, Pensacola, Florida, as a memorial to early carrier-UCAV development. Lessons learned fed directly into the X-47B and into the U.S. Navy's eventual MQ-25 Stingray procurement.

For Kids — a shorter, friendlier version

The Northrop Grumman X-47A Pegasus was an experimental American Navy drone. It was the first drone built to test landing on aircraft carriers, the hardest kind of flying. The X-47A first flew in 2003 and led directly to the larger X-47B, which actually did land on a carrier in 2013.

The X-47A is a small, kite-shaped flying-wing drone. It is 28 feet long with a 28-foot wingspan, smaller than a Boeing 737. One Pratt and Whitney engine pushes it to 360 mph, faster than most race cars. The drone has no tail and no traditional cockpit, just a smooth top surface.

The X-47A made several test flights at Edwards Air Force Base in 2003, proving that flying-wing drones could land on a small runway like a carrier deck. The lessons learned helped build the bigger X-47B, which became the first drone to land on a Navy aircraft carrier in 2013.

The X-47A is now retired and preserved at the National Naval Aviation Museum in Florida. The newer X-47B led to the operational MQ-25 Stingray refueling drone, which will enter Navy service in 2026. The X-47A's tailless flying-wing design will influence many future Navy drones.

Fun Facts

  • The X-47A Pegasus was the Navy's first drone built for carrier landings.
  • The drone is 28 feet long with a 28-foot wingspan, smaller than a Boeing 737.
  • Top speed is 360 mph, faster than most race cars.
  • The X-47A has no tail and a smooth flying-wing shape.
  • Lessons from the X-47A led to the bigger X-47B, the first drone to land on a carrier in 2013.
  • The X-47A is preserved at the National Naval Aviation Museum in Florida.
  • The newer MQ-25 Stingray refueling drone uses X-47-style ideas.

Kids’ Questions

Why is carrier landing hard?

An aircraft carrier deck is only 300 feet long, very short for a fast plane. The deck moves up and down with ocean waves. The pilot has to slam into the deck and catch a wire with a hook to stop in time. Drones must do this with no human pilot, using computers and radio signals from the ship. The X-47A's mission was to test if drones could do this safely.

What is the difference between X-47A and X-47B?

The X-47A is smaller (28 feet long) and was just a test drone. The X-47B is bigger (38 feet long), more advanced, and actually landed on real Navy aircraft carriers. The X-47B retired in 2015 after proving the concept. Its lessons led to the operational MQ-25 Stingray, which enters Navy service in 2026.

What is a flying wing?

A flying wing is a plane with no separate body or tail; the whole plane is one big wing. The B-2 stealth bomber and the X-47 family are flying wings. The design is stealthy (hard to see on radar) and efficient at high speeds, but harder to control than planes with tails. Computers make modern flying wings practical.

Variants

X-47A Pegasus (sole prototype)
Sole prototype airframe. First flight 22 February 2003. Flew 4–5 development sorties. Preserved at the National Naval Aviation Museum, Pensacola, Florida.
X-47B Pegasus (successor)
Larger, more capable successor on a different, full-size carrier-suitable airframe. First flight 2011; first carrier-based unmanned aircraft launch and recovery in 2013. Programme cancelled in 2015. See the separate X-47B entry.
MQ-25 Stingray (eventual operational successor)
U.S. Navy's first operational carrier-based UAV. Boeing was selected over Northrop Grumman's X-47B-derivative entry. Tasked with aerial refuelling rather than combat strike. IOC 2027 with VUQ-10. See the separate MQ-25 entry.

Notable Operators

Northrop Grumman / U.S. Navy / DARPA (developer)
Northrop Grumman flight-tested the X-47A as a demonstrator from Naval Air Station Patuxent River, Maryland. The U.S. Navy and DARPA served as programme sponsors and customers.
National Naval Aviation Museum (preservation)
The X-47A prototype is preserved at the National Naval Aviation Museum, Pensacola, Florida, displayed in the museum's modern carrier-aviation gallery as a memorial to early UCAV concept development.
Pacific Aviation Museum / preservation
Several U.S. naval-aviation museums hold X-47A-related artefacts including flight-test models and programme documentation. The aircraft is well represented in U.S. naval-aviation history collections despite its limited flight programme.

Frequently Asked Questions

How does X-47A differ from X-47B?

The X-47A was the smaller, less capable forerunner: a 1/3-scale demonstrator with 5,500 lb MTOW, 3,200 lbf thrust and roughly 3 demonstration flights. The X-47B was a full-size, carrier-suitable testbed with 44,000 lb MTOW and 17,500 lbf thrust, flying an extensive test programme that included the first U.S. Navy carrier-based unmanned aircraft launch and recovery in May 2013. Both share the same lambda-wing tailless low-observable design philosophy. The X-47A established proof of concept; the X-47B demonstrated carrier launch, recovery and autonomous aerial refuelling.

Why was X-47A cancelled?

Inter-service disagreement on programme priorities ended it. The Joint Unmanned Combat Air System (J-UCAS) was a joint U.S. Air Force / U.S. Navy effort from 2003 to 2006, but the two services had fundamentally different mission requirements — USAF wanted long-range land-based strike, USN wanted carrier-based short-ranged strike. That impasse led to cancellation in 2006. The U.S. Navy then continued unmanned-carrier-aviation development under the UCAS-D programme that produced the X-47B.

Did X-47A ever fly from a carrier?

No. The X-47A flew only from land bases, specifically Naval Air Station Patuxent River, Maryland. As a 1/3-scale demonstrator it was never intended for carrier operations; instead it produced foundational data for the X-47B, which did demonstrate carrier launch and recovery in May 2013 — the first unmanned aircraft ever to land on a U.S. Navy aircraft carrier, a milestone in unmanned aviation.

Where can I see an X-47A?

The sole X-47A prototype is preserved at the National Naval Aviation Museum, Pensacola, Florida, displayed in the museum's modern carrier-aviation gallery. It is one of the smaller exhibits there, but an important artefact of early carrier-UCAV development.

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