Piasecki H-21 Troop Carrier Helicopter in Vietnam

The big twin-rotor Piasecki H-21 Workhorse/Shawnee troop carrier helicopter in Vietnam in this old Army color film. From Wikipedia: “The Piasecki H-21 Workhorse/Shawnee is an American helicopter, the fourth of a line of tandem rotor helicopters designed and built by Piasecki Helicopter (later Boeing Vertol). Commonly called the “flying banana“, it was a multi-mission helicopter, utilizing wheels, skis, or floats. The H-21 was originally developed by Piasecki as an Arctic rescue helicopter. The H-21 had winterization features permitting operation at temperatures as low as -65 degrees F, and could be routinely maintained in severe cold weather environments.“