Jemiba said:... and in RAF Flying Review 1/62 there were two helicopter types, unknown to me :
a flying-crane version of the S-60 and a Lockheed four-seat helicopter without any
Do you mean the S-61 (Sea King)??
The S-60 was a flying crane from the get-go, although it was piston-engined, using the dynamic components of the S-56/H-37 Mojave.