Next-Generation Airlifter: what replaces the C-17

The U.S. Air Force intends to replace two cargo fleets with one aircraft, and the plane has a working name: the Next-Generation Airlifter, or NGAL.

Air Mobility Command is planning a single strategic airlifter that would cover the mission sets of both the C-17 Globemaster III, the tactical hauler that has anchored American airlift since the early 1990s, and the far larger C-5M Super Galaxy, Simple Flying reports. The two-for-one approach is meant to simplify logistics and cut lifecycle costs, and planners say it would keep strategic capacity uninterrupted.

The C-17 is not broken. It is old. Production ended in 2015, the average airframe is more than two decades into its life, and roughly 220 are still flying. General John Lamontagne, who leads Air Mobility Command, has called the C-17 the "workhorse of the fleet" while saying that whatever comes next has to fly in higher-threat airspace with more agility and survivability than today's transports, Simple Flying reports.

What the two aircraft do now

• C-5M Super Galaxy: a maximum payload of about 281,000 lbs, room for six Apache helicopters or two M1 Abrams tanks, and a need for long, prepared runways. The Air Force flies 52 of them.
• C-17 Globemaster III: a maximum payload of about 170,900 lbs, one Abrams plus support vehicles, and the ability to use short or semi-prepared strips of about 3,500 feet. The Air Force flies 222.
• Both are listed at roughly 2,400 nautical miles of range with a full load.

The C-17 arrived as the answer to a gap left by the Lockheed C-141 Starlifter, the Air Force's first jet-powered strategic airlifter, which traded rough-field ability for reach and speed. Simple Flying notes that a blended wing body design risks repeating the Starlifter's problem: efficient in the air, awkward on a short runway.

The schedule

• FY2027: Analysis of Alternatives, with an accelerated push to define requirements.
• As early as FY2038: first production aircraft, funding permitting.
• FY2041: initial operational capability.
• Around 2045: the C-5M retires, all 52 replaced.
• Around 2075: the C-17 retires, all 222 swapped out one for one.
• Total goal: about 274 NGAL aircraft.

Simple Flying is clear that none of this is an acquisition program yet. It is capability planning, and the Air Force is still deciding what the aircraft must do before it asks industry to design it.

One concept under study is the blended wing body, which merges fuselage and wings into a single lifting surface. JetZero, working with Northrop Grumman, won an Air Force contract in 2023 to build a 23-foot-wingspan demonstrator nicknamed Pathfinder. Simple Flying, citing Air & Space Forces Magazine, reports that the prototype's first flight is on track for 2027 and that early flights have validated baseline aerodynamic behavior.

The C-5M side has its own timeline. Air Force Times has noted that the re-engining and reliability program left the aircraft considerably more capable, with service life projected into the 2040s.

What this means for you: nothing changes on your next booking, because this is a defense procurement story about military cargo aircraft and the earliest new airframe is more than a decade away.

• Air Mobility Command
• C-17 Globemaster III
• C-5M Super Galaxy
• JetZero
• Next-Generation Airlifter