Farnborough, UK. July 11, 2016. And well when it comes to F35 B there is no rivalry between the two big engine makers. Pratt & Whitney and Rolls-Royce will join forces to provide comprehensive technical support at Royal Air Force Marham to support F135 engines and the LiftSystems on the U.K.’s F-35B Lightning II aircraft.

The two companies will institute a Performance-Based Logistics (PBL) approach to sustainment for the propulsion systems. A PBL contracting structure incentivizes contractors to focus on outcomes such as propulsion system availability, leading to greater efficiencies, mutual cost reductions, and operator benefits.

The companies formalized the new working relationship by signing a memorandum of understanding, agreeing to increase levels of cooperation and improve synergy as they join forces in support of the customer.

The agreement defines how the companies will collaborate and grow their sustainment capabilities. Pratt & Whitney, lead propulsion integrator for the F-35 program, will focus primarily on system-level performance of its F135 engines. Rolls-Royce will lead on support for the LiftSystem technology the company developed and produced, while also undertaking some delegated support work on the main F135 engine. The two companies will also look to duplicate this support model for other F-35B customers.

“With this new agreement, we’ll be able to provide optimum service and sustain the F135 Propulsion System and the LiftSystem to meet the growing global demands of the F-35 customer base,” said Bennett Croswell, president, Pratt & Whitney Military Engines.

The new agreement will focus the strengths of both companies to provide the best possible service solution in a more affordable and effective way for customers. The agreement will draw the companies closer together and lay the groundwork for further enhancing support for the propulsion systems in the future.

“This new agreement demonstrates the commitment from both companies to keep the customer at the heart of what we do, focusing on meeting their needs in the most cost-effective and efficient manner possible,” said Chris Cholerton, president, Rolls-Royce Defence Aerospace. “Rolls-Royce has been supporting the U.K.’s military aircraft fleets for more than 100 years, and we look forward to matching the innovation of this fantastic aircraft with an equally innovative support program.”

Pratt & Whitney and Rolls-Royce already support F-35B aircraft flown by the U.K. and U.S. Marine Corps across the United States.