 
			     
   Secure Scanned : 10/31/2025
				     Secure Scanned : 10/31/2025
                    
                    
                 
							The Secret of Flight 1959 -
Overview:Defines a vortex and explains its structure. Shows several types of vortex including the ring, tip and thermal vortex. Uses the smoke box, water tank, and motion pictures of tornadoes to illustrate how a vortex behaves.
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