English Royal Air Force air officer (1907–1996) who is credited with single-handedly inventing the turbojet engine. Three items: a color glossy 3.5 x 5 half-length of Whittle in later age, signed and inscribed in blue ink, "Alan Stein, with best wishes, Frank Whittle"; a glossy 10 x 8 photo of an early Power Jets W.2 turbojet engine, signed in blue ink, "Frank Whittle, 29 Aug. '78"; and an ALS, one page, 6 x 8.75, addressed to Alan Stein, in part: "Re your request for an autographed photo I fear you will have to be satisfied with the enclosed. I rarely respond to such requests." In overall fine condition.Format: Group lot