Tests of the Navy configuration of the F-35 Joint Strike Fighter show that the plane’s landing gear may need to be redesigned, and the helmet may be too heavy as well. Inside Defense reported that the shortcomings arose during takeoff and landing tests on the carrier George Washington. Sudden, jarring motions that took place during landings apparently knock the helmet-mounted display out of place, rendering it unusable until the pilot can adjust it, according to the report. Pilots reported moderate to severe pain as a result of the jarring landings, and the heavy helmets could contribute to neck injuries for some pilots.