NATIONAL HARBOR, Md.--The F-35 Joint Program Office and RTX's [RTX] Pratt & Whitney have contacted Honeywell [HON] about its Power and Thermal Management System (PTMS) for the Lockheed Martin [LMT] F-35, but no substantive discussions about upgrading the existing PTMS are underway, as the F-35 JPO analyzes the future thermal requirements for the F-35 and the best path to hit those requirements, a Honeywell official said this week. Pratt & Whitney said that it has established firewalls between its F135…
