The first YUH-61 was rolled out of the Boeing Vertol factory in Ridley Park, just west of PHL, on 9 September 1974 and the caption from Veriflite suggests the photo was taken there. The first flight was made from the Grumman factory airfield at Calverton, NY. The UH-61 lost the UTTAS (Utility Tactical Transport Aircraft System) competition to the Sikorsky UH-60. Photo from: Vertical Flight Society

This Marine Corps UH-34D never served overseas but wears the markings of Marine Medium Helicopter Squadron 163 that did see extensive combat in Vietnam. The aircraft was on display at the Udvar-Hazy Center of the National Air and Space Museum until June, 2015.

The UH-60 and the AH-64 won, the UH-61 and the AH-63 lost and it seems their manufacturers like to forget about these loser designs. One prototype of a civilian variant of the H-61 was built. It reportedly first flew on 5 August 1975, but was already on display at the Paris Air Show in June. Petroleum Helicopters took options on 28 aircraft, but Boeing cancelled the type after it failed to win military orders. A naval variant, the Model 237, lost out to the SH-61 and was never built. It looks like the photo was taken at the factory in Ridley Park, with the Delaware River in the background, but this is unconfirmed. Photo from: Vertical Flight Society

This HOS-1, acquired and restored by the American Helicopter Museum and Education Center (AHMEC), was designated Gander Express following the 1946 rescue of injured passengers from a crashed Sabena Airlines DC-4 airliner in Gander, Newfoundland, by a Coast Guard HNS-1 (R-4) and the HOS-1 (R-6). Is AHMEC's HOS-1 the original Gander Express? We cannot be sure the entire aircraft is. While the log book and paper trail indicate that it is, the aircraft was received in parts and two major pieces (the fuselage and tail boom) did not perfectly align, suggesting those parts are from two aircraft.

This Marine Corps UH-34D never served overseas but wears the markings of Marine Medium Helicopter Squadron 163 that did see extensive combat in Vietnam. The aircraft was on display at the Udvar-Hazy Center of the National Air and Space Museum until June, 2015.