55-4140 Piasecki CH-21C Workhorse American Helicopter Museum West Chester - Brandywine (OQN / KOQN), USA - Pennsylvania Stuart Jessup - 26/09/2007
55-4140 Piasecki CH-21C Workhorse American Helicopter Museum West Chester - Brandywine (OQN / KOQN), USA - Pennsylvania Juha Ritaranta - 13/02/2010
55-4140 Piasecki CH-21C Workhorse Intrepid Sea, Air and Space Museum New York - USS Intrepid, USA - New York Robin A Walker - 16/05/1990
