The Pentagon is considering Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) engine options due to the propulsion system's difficult sustainment and an expected need for better performance in the future.

Pratt & Whitney's F135 conventional take-off and landing engine in afterburner on a test stand. The Pentagon is considering F-35 engine alternatives due to the F135's difficult sustainment and an expected need for better propulsion system performance in the future. (Pratt & Whitney)

Lieutenant General Eric Fick, F-35 program executive officer (PEO), told a House panel on 13 July that the Pratt & Whitney F135-PW-100 turbofan's costs and sustainment are challenging. The Pentagon, he said, will start to bear those costs in the sustainment of the air system as the programme approaches the 2,000 hour first scheduled engine removal.

Additionally, Lt Gen Fick said the Pentagon will probably need increased power and thermal management capability from the F-35's propulsion system after Block 4 modifications and upgrades are implemented.

There is need to evaluate the F-35 engine options, he added.

The Pentagon is considering Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) engine options due to the propulsion system's difficult sustainment and an expected need for better performance in the future.

Pratt & Whitney's F135 conventional take-off and landing engine in afterburner on a test stand. The Pentagon is considering F-35 engine alternatives due to the F135's difficult sustainment and an expected need for better propulsion system performance in the future. (Pratt & Whitney)

Lieutenant General Eric Fick, F-35 program executive officer (PEO), told a House panel on 13 July that the Pratt & Whitney F135-PW-100 turbofan's costs and sustainment are challenging. The Pentagon, he said, will start to bear those costs in the sustainment of the air system as the programme approaches the 2,000 hour first scheduled engine removal.

Additionally, Lt Gen Fick said the Pentagon will probably need increased power and thermal management capability from the F-35's propulsion system after Block 4 modifications and upgrades are implemented.

There is need to evaluate the F-35 engine options, he added.

The Pentagon is considering Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) engine options due to the propulsion system's difficult sustainment and an expected need for better performance in the future.

Pratt & Whitney's F135 conventional take-off and landing engine in afterburner on a test stand. The Pentagon is considering F-35 engine alternatives due to the F135's difficult sustainment and an expected need for better propulsion system performance in the future. (Pratt & Whitney)

Lieutenant General Eric Fick, F-35 program executive officer (PEO), told a House panel on 13 July that the Pratt & Whitney F135-PW-100 turbofan's costs and sustainment are challenging. The Pentagon, he said, will start to bear those costs in the sustainment of the air system as the programme approaches the 2,000 hour first scheduled engine removal.

Additionally, Lt Gen Fick said the Pentagon will probably need increased power and thermal management capability from the F-35's propulsion system after Block 4 modifications and upgrades are implemented.

There is need to evaluate the F-35 engine options, he added.

The Pentagon is considering Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) engine options due to the propulsion system's difficult sustainment and an expected need for better performance in the future.

Pratt & Whitney's F135 conventional take-off and landing engine in afterburner on a test stand. The Pentagon is considering F-35 engine alternatives due to the F135's difficult sustainment and an expected need for better propulsion system performance in the future. (Pratt & Whitney)

Lieutenant General Eric Fick, F-35 program executive officer (PEO), told a House panel on 13 July that the Pratt & Whitney F135-PW-100 turbofan's costs and sustainment are challenging. The Pentagon, he said, will start to bear those costs in the sustainment of the air system as the programme approaches the 2,000 hour first scheduled engine removal.

Additionally, Lt Gen Fick said the Pentagon will probably need increased power and thermal management capability from the F-35's propulsion system after Block 4 modifications and upgrades are implemented.

There is need to evaluate the F-35 engine options, he added.

The Pentagon is considering Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) engine options due to the propulsion system's difficult sustainment and an expected need for better performance in the future.

Pratt & Whitney's F135 conventional take-off and landing engine in afterburner on a test stand. The Pentagon is considering F-35 engine alternatives due to the F135's difficult sustainment and an expected need for better propulsion system performance in the future. (Pratt & Whitney)

Lieutenant General Eric Fick, F-35 program executive officer (PEO), told a House panel on 13 July that the Pratt & Whitney F135-PW-100 turbofan's costs and sustainment are challenging. The Pentagon, he said, will start to bear those costs in the sustainment of the air system as the programme approaches the 2,000 hour first scheduled engine removal.

Additionally, Lt Gen Fick said the Pentagon will probably need increased power and thermal management capability from the F-35's propulsion system after Block 4 modifications and upgrades are implemented.

There is need to evaluate the F-35 engine options, he added.

The Pentagon is considering Lockheed Martin F-35 Lightning II Joint Strike Fighter (JSF) engine options due to the propulsion system's difficult sustainment and an expected need for better performance in the future.

Pratt & Whitney's F135 conventional take-off and landing engine in afterburner on a test stand. The Pentagon is considering F-35 engine alternatives due to the F135's difficult sustainment and an expected need for better propulsion system performance in the future. (Pratt & Whitney)

Lieutenant General Eric Fick, F-35 program executive officer (PEO), told a House panel on 13 July that the Pratt & Whitney F135-PW-100 turbofan's costs and sustainment are challenging. The Pentagon, he said, will start to bear those costs in the sustainment of the air system as the programme approaches the 2,000 hour first scheduled engine removal.

Additionally, Lt Gen Fick said the Pentagon will probably need increased power and thermal management capability from the F-35's propulsion system after Block 4 modifications and upgrades are implemented.

There is need to evaluate the F-35 engine options, he added.