Michael McMahon served with HMR 161 in Korea from mid 1951 till late 1953. He was a combat photographer.
Photos submitted by Mike McMahon (Michael’s son) verebus@gmail.com
Descriptions and details provided by Craig Thorson
The HRS-1 was an innovative new design, designated by Sikorsky as the S-55. By placing the radial engine in the nose, Sikorsky engineers not only solved the center-of-gravity issues of earlier designs, they also made it easier to maintain the helicopter. More important, the resulting interior space could be used to carry fully equipped combat troops or cargo. The opportunities literally opened up by this expanded space would soon be demonstrated by HMR-161. Marines had been experimenting with the concept of air assault and supply by helicopters since 1949. Now it could—and would—be put into wartime practice in dramatic fashion.