The U.S. Air Force has begun flight tests of the upgraded Rolls-Royce T56 on a C-130H, which could help extend the service life of the transport to 2040. Flight tests of the T56 Series 3.5 enhancement package are taking place at Edwards AFB, Calif., using an Air National Guard-operated Lockheed Martin C-130H. Testing aims to verify a predicted fuel burn improvement of around 8%, as well as assessing flying qualities and improved payload capability. Rolls says the upgrade already has ...

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