Now the other shoe drops.
http://breakingdefense.com/2015/06/ge-sets-aetd-record/Now we know why. At a Monday briefing here, the head of Pratt’s F135 program, Mark Buongiorno, told reporters the company didn’t want to release the information because the Adaptive Engine Technology Development (AETD) program’s engines were being tested for dimensions that matched those of the F-35. A more fuel-efficient AETD engine could overcome one of the longstanding concerns about the F-35 in an era of ever deeper anti-access/area denial defenses, its relatively short unrefueled range of a bit more than 600 nautical miles.
Then General Electric put out a release late yesterday about testing for its Adaptive Versatile Engine Technology (ADVENT) project, which achieved the highest combined compressor and turbine temperature operation “in the history of jet engine propulsion.” That release included this sentence: “It is now being applied to the next step – an engine that could fit an F-35-like aircraft.”