Lockheed Martin Chooses Single‑Engine Design for All F‑35 Variants

Lockheed Martin’s latest decision to equip every version of the F‑35 with a single engine marks a deliberate shift in the Joint Strike Fighter’s architecture. The move, which applies to the F‑35A, B, and C, was not made in isolation. Engineers tied the propulsion choice to a broader strategy of sharing parts, systems, weight, and cost across the three U. S. military branches that will operate the aircraft. While a single engine is common on conventional fighters, it appears counterintuitive for the F‑35B, which must transition from conventional flight to short‑takeoff and vertical landing. The design aims to keep the aircraft’s weight down and reduce the number of unique components, thereby simplifying logistics and maintenance. The decision underscores the program’s emphasis on cost containment and cross‑platform interoperability, even as it challenges the F‑35B’s vertical‑landing performance.