Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Two items: a TLS, signed "I. Sikorsky," one page, 8.5 x 11, Sikorsky Aircraft letterhead, March 2, 1966, in part: "I have taken two trips through the bottom of Grand Canyon which were tremendously impressive and have also flown across it in a helicopter. In line with your request I am glad to enclose an autographed photograph"; and a vintage matte-finish 8 x 9.75 photo of Sikorsky posing next to a helicopter, signed and inscribed in the lower border in blue ballpoint, "To Ken and Joyce Brown, With kindest regards of I. Sikorsky, March 2, 1965." In overall very good to fine condition, with edge rippling to the photo, and paperclip impressions to the top edge of both.
