Monday, April 15, 2024
HomeTechThe Pentagon has modified all F-35 Lightning II fighters, but still has...

The Pentagon has modified all F-35 Lightning II fighters, but still has not found the cause of the “harmonic resonance” in the F135 engines

-


The Pentagon has modified all F-35 Lightning II fighters, but still has not found the cause of the “harmonic resonance” in the F135 engines

At the end of last year, the Pentagon stopped flights and supplies of fifth-generation F-35 fighters, as well as F135 engines. The reason was the so-called “harmonic resonance”, due to which the F-35 aircraft crashed near the Lockheed Martin plant in Texas during landing. Six months later, all American fighters were modified, but the cause of the “harmonic resonance” is still not established.

What is known

In simple terms, “harmonic resonance” is a vibration that destroys the engine’s fuel pipe. The downing of the F-35 in Texas is not the first manifestation of the problem. Due to vibration, the fighter was disabled back in March 2020, i.e. almost three years before the incident near the Lockheed Martin plant.

The F-35 Program Office and Pratt & Whitney found a temporary solution. The F135 powerplants received a “hole” that “reduces the chance of loss of engine control” in the event of a fuel tube failure due to vibration. Despite this, so far the US Department of Defense has not been able to find out what exactly is the cause of the “harmonic resonance”.


By the beginning of May, all American F-35s received “updated” engines. The government and industry team are continuing to work to hand over all fighter jets whose deliveries have been delayed due to an engine vibration problem.


On February 17, 2023, Pratt & Whitney received approval to resume deliveries of F135 powerplants. Lockheed Martin was able to resume deliveries of the F-35 Lightning II about a month later. It is expected that the backlog will be completely eliminated by early summer.


As the Pentagon continues to investigate engine issues, US F-35 operational readiness remains below the target of 70% for the F-35A and below 75% for the B/C models. In April, the combat capability of all US F-35s was 56%.

Source: Defense One





Source link

gagadget.com

LEAVE A REPLY

Please enter your comment!
Please enter your name here

Most Popular