Definitely not a Cheyenne , one too many rotor blades, among other differences.
I got curious and looked around, Sikorsky designed the S-67 to the same requirements as the Cheyenne, made one prototype.
Stopped development when it crashed, but decided to use the name Blackhawk on a later design.
A pair of Turkish Air Force F84 jet fighters, serving as a military escort, fly unusually close to the wing of the airliner carrying Pope Paul VI over Turkey, December 5, 1964, as the Pope was returning home from India. Photo by AP staff photographer traveling aboard the plane with the pontiff.