Designation | Modified Role | Location | Serial / Regist. |
---|---|---|---|
XR-4 | American Helicopter Museum | 41-18874 | |
YR-4A |   |   | |
YR-4B (YH-4B) |   |   | |
R-4B | New England Air Museum | 43-46503 | |
  |   | United States Air Force Museum | 43-46506 |
  |   | United States Army Aviation Museum | 43-46592 |
XR-4C |   |   |
Sikorsky R-4 on display | |||||
---|---|---|---|---|---|
|