The Sikorsky R-5 (S-48) was an improved R-4 (VS-316), the first of five XR-5s flying on 18 August 1943. The first 26 out of 60 production R-5As were given the YR-5A designation and 43-46604 must have been one of nine YR-5As delivered before the end of WWII. The design was enlarged and further improved in 1946 as the R-5F (S-51). Redesignated as an H-5A in 1948, 43-46604 was involved in an accident in New Mexico on 20 September 1949. Photo from: Wright State University
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