in the quest to find a photograph - taken after the Second World War - that contains over forty aircraft in flight, this is the highest quality photograph so far: via this forum thread. I count 49 Sea King, Wessex, Gazelle, and Sea Prince (?) in this formation - which I believe is from the 1975 Royal Naval Air Station Culdrose Air Day.
"HC-6 det onboard USS San Diego (AFS-6) 1979. Some of the guys displaying a prize obtained while on liberty in Rome. Stubwings were painted after leaving Norfolk. Each det had a different design on their aircraft."
photo by Jim Strates (not Straits?), 1979 (via)
"This impressive scene was photographed when the NASA 747 carrier aircraft and five T-38 aircraft flew over the Space Shuttle Orbiter 101 “Enterprise” while it was parked on the runway at Edwards Air Force Base in Southern California. The Orbiter 101 had just completed a five-minute, 31-second unpowered mission during the second free-flight of the Space Shuttle Approach and Landing Test series, on September 13, 1977, at the Dryden Flight Research Center.”(via)
"Jan. 31, 1977: A horse and rider watch as the space shuttle Enterprise is towed from a Rockwell International facility in Palmdale to Edwards Air Force Base for a year of flight tests. Townspeople lined the route for a glimpse of the 110-ton shuttle. A 90-wheel transport was used and accompanied by a 20-vehicle convoy." (via)
"Full-scale mockup of Space Shuttle Orbiter Constitution (OV-101) 1975 - Donwney, CA"
(via aharvey2k’s Flickr)