Piasecki H-21 Workhorse Utility Transport Helicopter (1952-63), Pima Air & Space Museum. Tucson, AZ.

Piasecki H-21 Workhorse Utility Transport Helicopter (1952-63), Pima Air & Space Museum. Tucson, AZ.
Photo by Jim Steinhart © 2011, all rights reserved. (Ref: AZTS65)

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