The US Air Force has issued another request for information to defense firms as it advances work on the Next-Generation Air Refueling System (NGAS).
NGAS began in 2023 with an initial RFI, followed by a 2024 call for propulsion-related concepts. The service aims to field a new tanker by 2040, though shifting requirements have delayed progress.
Today’s tanker fleet consists mainly of the Boeing KC-135 Stratotanker and KC-46 Pegasus. The KC-135, introduced in the 1950s, is nearing phase-out, while the KC-46, adapted from the Boeing 767, is gradually replacing it.
The Pentagon’s FY2026 budget proposal signals it may buy as many as 75 more KC-46s instead of pursuing another interim tanker program.
But the KC-46 has struggled with delays and technical problems, including boom malfunctions, fuel system faults, and issues with its vision equipment. Deliveries were temporarily suspended in March due to cracks in two aircraft, resuming in May after inspections cleared the fleet.
