The Department of Defense awarded Pratt & Whitney a $2 billion contract to supply F135 turbofan engines for the Lot 11 order of F-35 Lightning II aircraft.
The 11th low rate initial production contract will cover 135 engines, as well as programme management, engineering support, production support, spare modules and spare parts, P&W said on 31 May 2018.
The company said it has delivered 375 F135 engines to date and deliveries of Lot 11 engines will start this year.
The $2 billion contract for F135 turbofan engines comes in addition to two long lead components, parts and materials contracts that P&W was awarded in August and November 2016. Those contracts totaled $185 million.
Including the long lead contracts, the average cost per engine for Lot 11 comes to roughly $16.2 million per unit. Engine unit prices vary as the conventional takeoff and landing Lockheed Martin F-35A engine is priced lower than the engine system for the vertical takeoff and landing variant F-35B, however.
Pratt & Whitney was awarded $1.95 billion to supply 99 F135 engines for Lot 10. The average cost per engine unit for Lot 10 was about $19.7 million. Thus, costs per engine declined more than 17% from Lot 10 to Lot 11.
Nonetheless, the jet engine manufacturer said it will only slightly reduce the unit recurring flyaway (URF) of the Lot 11 F135 engines compared Lot 10. Pratt & Whitney declined to disclose flyaway costs, sharing only cost reductions percentages.
The URF price for the 110 LRIP Lot 11 conventional takeoff and landing and carrier variant propulsion systems will be reduced 0.34% from the previously negotiated LRIP Lot 10 URF, according to the company. The URF price for the 25 LRIP Lot 11 short takeoff and vertical landing propulsion systems will be reduced 3.39% from the previously negotiated LRIP Lot 10 URF.