history · 04 August 1944 · 80 years ago
An extensively modified Thunderbolt fighter (XP-47J) became the first airscrew driven aircraft to exceed 500 mph in level flight with a recorded speed of 504 mph. However the P-47J did not go into production as the Republic development team chose to concentrate on the more advanced XP-72 project.
More history on 04 Aug
OnThisDay.net