Which engineer born on May 16, 1899 helped develop the first truly successful V/STOL design of aircraft?
Roy Chaplin: Roland Henry Chaplin, OBE, FRAeS, (16 May 1899 – 13 December 1988), known as "Roy", was an aeronautical engineer who worked with Sydney Camm at Hawker Aircraft Limited from 1927 to 1962. Harrier Jump Jet:  Originally developed by UK manufacturer Hawker Siddeley in the 1960s, the Harrier emerged as the only truly successful V/STOL design of the many attempted during that era, despite being a subsonic aircraft, unlike most of its competitors.
Roland Henry Chaplin