The U.S. Air Force just awarded a contract to develop something that sounds like a contradiction: jet engines designed to be thrown away. Small, cheap, and built for a single mission, these disposable powerplants are intended for the next generation of cruise missiles, loitering munitions, and expendable drones — weapons that will never return to base. The contract, announced on April 9, 2026, signals a fundamental shift in how the military thinks about propulsion. For decades, jet engine development has been about durability, efficiency, and lifespan — building powerplants that last thousands of hours. Now the Air Force wants engines that last a few hours, cost a fraction of traditional turbines, and can be manufactured by the thousands. The era of the throwaway jet engine has arrived. And it may reshape the economics of air warfare more than any stealth fighter or hypersonic missile.

Why Throw Away an Engine?

A conventional jet engine like the Pratt & Whitney F135 that powers the F-35 is an engineering marvel — 40,000 pounds of thrust, thousands of precisely machined turbine blades, and a design life of thousands of flight hours. It also costs about $16 million and takes months to build. None of that makes sense for a weapon that flies once. A cruise missile needs an engine that runs for two to six hours at most. A loitering munition might orbit a target area for an afternoon before diving in. An expendable drone wingman might fly a handful of missions before being considered spent. Putting a multi-million-dollar engine in any of these platforms is like bolting a Ferrari engine into a go-kart headed for a demolition derby. What the military needs instead is a small turbojet or turbofan that costs tens of thousands of dollars, can be mass-produced using simplified manufacturing techniques, and delivers just enough performance to get the weapon to its target. No maintenance schedule. No overhaul. No second flight.

The Manufacturing Revolution

The key enabler is modern manufacturing technology. Additive manufacturing — 3D printing — allows engine components to be produced with fewer parts, less machining, and dramatically shorter lead times. A traditional jet engine might contain thousands of individually machined components assembled over weeks. A disposable engine designed for additive manufacturing might reduce that to dozens of printed parts assembled in hours. Companies like Kratos Defense and several smaller startups have been working on this problem for years. The Kratos TDI-J85 engine, for example, powers the company’s XQ-58A Valkyrie drone and is designed for affordability and simplicity rather than longevity. The new Air Force contract pushes this concept further — toward engines so cheap that losing them is a rounding error in the defense budget. The implications ripple outward. If you can build a jet engine for $50,000 instead of $5 million, you can build a missile-carrying drone for the price of the missile itself. Suddenly, the math that has kept precision airpower expensive and scarce for decades collapses. You can afford to lose platforms. You can afford to saturate defenses. You can afford the kind of mass that wins wars of attrition.

The Attrition Calculus

Modern air defense systems are extraordinarily lethal — and extraordinarily expensive. A single Patriot interceptor missile costs roughly $4 million. An S-400 engagement can cost even more. Forcing an adversary to expend a $4 million missile against a $100,000 drone with a $50,000 engine is the kind of cost exchange that wins wars before they start. This is the logic driving the Air Force’s investment. The future of air warfare is not a small number of exquisite, irreplaceable platforms. It is a large number of affordable, expendable ones — each powered by an engine that was never meant to come home. The throwaway engine is not glamorous. It will never hang in a museum or power a record-breaking flight. But it may be the single most important propulsion development since the afterburner — because it makes possible a kind of air warfare that quantity-limited forces have never been able to fight. Sources: Air & Space Forces Magazine, Army Recognition