"We are delighted to have completed the capture of David," the Academy's Head of Recruitment Malcolm Elias told the club's official website.
"He's an exciting young talent with fantastic physical prowess. He's a natural athlete who possesses great pace and has represented London as a sprinter at the English Schools National Track and Field Championships.
"Along with Marvin Pourie and Nathan Ecclestone he'll provide excellent competition for places among the first year boys in this season's under-18 set-up."