The Sikorsky S-61R is a twin-engine helicopter used in transport or search and rescue roles. A developed version of the S-61/SH-3 Sea King, the S-61R was also built under license by Agusta as the AS-61R. The S-61R served in the United States Air Force as the CH-3C/E Sea King and the HH-3E Jolly Green Giant, and with the United States Coast Guard as the HH-3F, nicknamed "Pelican".
This article covers several different variants of this type in different roles, one major difference compared to the S-61 was a rear ramp.
Sikorsky S-61R
The S-61R type, in this case an HH-3E has a rear ramp, shown here open to load a patient (1992)
A USAF HH-3E Jolly Green Giant helicopter flies over Canada.
A CH-3C during the 1960s.
The Sikorsky SH-3 Sea King is an American twin-engined anti-submarine warfare (ASW) helicopter designed and built by Sikorsky Aircraft. A landmark design, it was one of the first ASW rotorcraft to use turboshaft engines.
Sikorsky SH-3 Sea King
SH-3 Sea King dipping a sonar, 1983
XHSS-2 Sea King prototype
SH-3As of HS-6 above Kearsarge in the early 1960s