Who builds the F-35 engine?
The F135 engine is used in the F-35A, F-35B, and F-35C variants of the F-35 Lightning II fighter jet. Pratt & Whitney, a United Technologies Corporation (UTC) company, designed and developed the F135 engine in collaboration with Lockheed Martin, the prime contractor for the F-35 program. What many critics complain about with the F-35 is that it has too small wings (in order to be stored compactly on an aircraft carrier), which gives the aircraft little lift. The critics say that small wings give the F-35 bad lift because the wing area is crucial for an aircraft to achieve a good lift.The fact that a Rafale was able to lock and “kill” both the F-22 and F-35 in different eras also demonstrates how sensor technology is catching up to stealth, with IRST and advanced radar increasingly capable of detecting low-observable aircraft.Siren said the biggest surprise of the F-35 was its flight controls in low-speed scenarios. The fifth-generation fighter jet is equipped with a better sensor suite, situational awareness, and data fusion capabilities than the F-16. Those advanced capabilities allow it to perform as more than a fighter jet.Despite having planes in rotation, the F-35 has been plagued by structural and software issues that limit the aircraft’s time at top speed, maneuverability at certain angles of attack, and stealth capabilities. The machine gun on the F-35A variant used by the Air Force cannot even shoot straight.The F-35 is the world’s most advanced and lethal fighter jet. The 5th Generation F-35 combines advanced stealth, sensors and information fusion in a supersonic, highly maneuverable fighter. All three F-35 variants have conducted combat operations and the F-35 is one of the most reliable aircraft in operation today.
How much does the F-35 engine cost?
The Pentagon’s most recent Lot 18 agreement with Pratt & Whitney has raised the F-35A’s flyaway cost back beyond $100 million. Each F135 engine now costs an average of $20 million, up from Lot 17’s $14–15 million. The F-35’s hardware and software upgrade effort, known as Block 4, is designed to boost the fighter jet’s weapons capabilities, sensors and sensor fusion. As of September 2025, it was at least $6 billion over budget and years behind schedule, which was partly due to delays with the implementation of TR-3.