'A tiny Sikorsky H-5 Dragonfly helicopter of the 3rd Air Rescue [Squadron] revs its main and tail rotors as it prepares for a rescue mission on which it will pick up one or possibly two frontline soldiers.' The 'giant' C-54 on the left is 42-72590 - we split the original picture. Photo from: US Air Force

Another H-5G in Korea. 48-526 had a mishap at Hamilton AFB, California on 27 May 1950 (48-557 had a separate accident on the same date). 48-526 is reported attached to the US Army's 8063rd MASH in 1952. Photo from: National Archives at College Park, Maryland

Maintenance under primitive conditions makes clear this shot was taken in Korea. 48-536 to N6197C with Tropi Copters of Honolulu. Reg not cancelled until 2009. Photo from: National Archives at College Park, Maryland

This rescue helicopter is listed as written off after an accident at Walker AFB, New Mexico on 27 May 1950, but it must have been repaired, because this photo is from the Korean War as other pictures of H-5Gs, undergoing open-air maintenance in the background, show more conclusively. Note tail rotor, still made of wood! Photo from: National Archives at College Park, Maryland

Probably two aircraft of the 3rd Air Rescue Squadron during the Korean War.

'Medical patient arriving off helicopter for treatment.' Mr Horwitz served with an Army MASH field hospital but the H-5G was operated by Air Force rescue units. Photo by: Melvin Horwitz / Central Connecticut State University

The wartime camouflage on the hangars was still evident in 1948.