Further advances in Boeing's Joint Strike Fighter development program have included installation of the propulsion system in its X-32B concept demonstrator in less than four hours. This was the second achievement of this kind in three months, following a four-hour installation in April of the Pratt & Whitney JSF119-614 engine in the X-32A demonstrator, optimized for conventional and aircraft-carrier operation. Both the X-32A and X-32B are now equipped with their flight-rated propulsion systems, based on the P&W JSF119 turbofan. Rolls-Royce is supplying the vertical lift and attitude-control system components, including two directional vectored-thrust exhaust nozzles, required for the X-32B to achieve STOVL operations. The Boeing STOVL system is based on combat-proven direct-lift technology. During ground testing, the system transitioned between conventional and STOL modes in as little as one second, from a typical time of three seconds. Many of the 190 trial transitions were achieved at full power settings.