The Future of the F-35 | Chapter 2 | Upgrade

The F-35 has been upgraded several times, but its engine never has. To enable the capabilities planned for the next upgrade, known as Block 4, Pratt & Whitney is proposing the F135 Engine Core Upgrade – a “drop-in” improvement that will save billions for taxpayers and give warfighters what they need in a timely way. Chapter 1: Trust:    • The Future of the F-35 | Chapter 1 | Trust