Pentagon Sets 850-Jet F-35 Framework With 317 Deliveries Outstanding

The Pentagon has established a decade-long framework with Lockheed Martin covering up to 850 F-35 fighters for the U.S. military, even as 317 aircraft reportedly remained undelivered to customers as of September 2026. Announced on October 22, the arrangement offers industry a long planning horizon, but it does not by itself clear the backlog or deliver the annual purchases the Air Force says it needs.

The broader plan spans production Lots 21 through 30 and establishes a baseline of 156 aircraft per year for the United States and participating allied countries. At that rate, Lockheed Martin would produce 1,560 F-35s over 10 years. Pricing and schedules still must be finalized through contracts, while execution remains dependent on congressional authorization and appropriations. Neither the Pentagon nor Lockheed Martin disclosed a total value.

Production stability is not the same as delivered capacity

The framework addresses one of aerospace manufacturing’s persistent problems: suppliers are reluctant to expand factories, hire specialized workers or order materials years ahead when demand is negotiated in shorter increments. A predictable production baseline gives Lockheed Martin and its supplier network more confidence to make those investments before individual aircraft orders arrive.

Lockheed Martin said that certainty would support capacity expansion, manufacturing efficiencies and a more resilient supply chain. The Pentagon said the company would commit up to $7 billion to programs supporting the F-35. Lockheed also projects that the wider program could support 317,000 U.S. workers and generate as much as $79 billion in annual economic activity.

Those are company and government projections, not final measures of taxpayer savings or delivery performance. The practical test will be whether long-term purchasing authority produces firmer prices, more reliable schedules and aircraft that customers can accept on time. The unresolved Lot 20 negotiations illustrate the constraint: inflation-driven production-cost increases have prolonged that round even before the new framework’s Lots 21-30 begin.

The 317-aircraft delivery backlog is therefore central to evaluating the agreement. Production output measures how many airframes move through the manufacturing system; delivery requires aircraft to reach an acceptable contractual configuration and be transferred to a customer. A stable rate of 156 aircraft annually can protect factory throughput, but any persistent gap between production and acceptance leaves governments waiting while labor, components and capital remain tied up in aircraft not yet delivered.

There is already a large operating base for the program, with 1,344 F-35s reported in service with the United States and allied countries. That scale increases the value of predictable spares, modification work and supplier support, all of which are included within the long-term production and sustainment concept. It also means production planning must serve existing operators as well as customers waiting for new aircraft.

The Air Force’s requirement adds a second gap

The Air Force says it needs 1,509 combat-coded fighters by 2035. Its proposed mix assigns as much as 40% of that fleet to F-35s, about 20% to F-22s and their F-47 successor, and the remaining 40% to F-15s and F-16s. The A-10 is outside that stated 2035 plan.

Reaching 1,509 aircraft depends on more than Lockheed Martin’s global production rate. The Air Force has long identified a requirement to buy an average of 72 new fighters annually, but its fiscal 2027 request includes 38 F-35s and 24 F-15EXs a total of 62. That leaves the proposed annual purchase 10 fighters below the service’s stated average requirement.

The comparison also has to account for customers competing for positions within the same production baseline. The planned 156 F-35s per year include U.S. and international aircraft, so the figure cannot be treated as annual capacity reserved for the Air Force. Its fleet objective also excludes 500 planned unmanned collaborative combat aircraft targeted for acquisition by 2032; those systems remain a separate part of the force plan rather than substitutes already deducted from the 1,509-fighter requirement.

For taxpayers and allied operators, the framework purchases predictability rather than immediate inventory. It could support bulk material orders, steadier employment and fewer disruptive contract cycles, but the eventual public cost remains unknown until pricing is negotiated and funded. For aerospace workers and suppliers, the decade-long demand signal is substantial. For the Air Force, the harder measures remain aircraft accepted, annual purchases funded and progress toward 1,509 fighters by 2035.

By David Whitaker — Associate editor for AMI’s aerospace and drone systems desk, translating flight systems, aircraft programs, spaceflight, and UAV developments into accessible technical stories.