More Problems With F-35 Revealed

More bad news for the JSF program. The B variant is on probation and now it seems that the F-35A variant is not performing as expected. No news on the F-35C.

The F-35 Lightning II strike fighter has previously undisclosed problems with its handling, avionics, afterburner and helmet-mounted display, according to a report by the Pentagon’s Director of Operational Test and Evaluation.

Both the Air Force F-35A variant and Marine Corps’ F-35B model experienced “transonic wing roll-off, [and] greater than expected sideslip during medium angle-of-attack testing,” the report said.

The report also says that various components are not as reliable as expected.

Additionally, the Pratt and Whitney F-135 engine has encountered an afterburner “screech,” in which airflow disruptions cause severe vibrations, preventing the engine from reaching maximum power. That problem has delayed some required testing.

According to the report, the program has already begun efforts to fix the problem. Pratt and Whitney officials were not immediately available for comment.

Further, the report indicates problems with the aircraft’s helmet-mounted display. Unlike many previous aircraft, the F-35 does not have a cockpit-mounted head-up display; the pilot instead views critical data projected on the helmet visor.

By: Shelldrake