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Honeywell debuts upgrade for F-35 cooling system

Summary by Inside Defense
Honeywell Aerospace is pitching a new power and thermal management system that would bring 25% more cooling capacity to the F-35 Joint Strike Fighter, according to a company release issued today. The upgrade, called P40, would boost the aircraft's cooling capacity from about 32 kilowatts of energy to 40 kilowatts “through software updates and targeted liquid-cooling enhancements” in the near term, Honeywell said. It comes as Lockheed Martin and …

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Key takeaways Honeywell Aerospace, based in Phoenix, Arizona, has unveiled an improvement to the power and thermal management system (PTMS) of the F-35, known as the P40. This modification is intended to expand the aircraft's cooling capacity by 25 percent, from 32 to 40 kilowatts. The upgrade was achieved through software optimizations and refinements to […]

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Inside Defense broke the news in Arlington, United States on Tuesday, September 22, 2026.
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