A new Navy twin jet fighter designed for carrier operation, the Chance Vought XF7U-1, has successfully completed its initial flight testing at the Naval Air Test center.A jet flying wing. New US Navy swept-back wing fighter, the Chance Vought XF7U-1, which us designed for shipboard operation, has successfully completed its initial flight test. The XF7U-1 is tail-less and totally unlike any other service plane so far revealed. Incorporation of the sweep-back of the wings, known to be desirable in high-speed machines, together with a twin engine installation, makes this formidable Navy fighter potentially capable of speeds in excess of current models of operational jets, land or carrier-based. It is rated in the"over 600-mile-an-hour class." November 25, 1948.