Click through the slideshow to see archival photos of Rensselaer Polytechnic Institute in Troy, N.Y.  Rensselaer Polytechnic Institute Armory, Troy, New York - A group of members of the Air Force ROTC at RPI do some practical aerodynamics during some lighter moments in their class schedule. This was a test to see how their paper planes could handle, fly and fly for distance. April 20, 1994 (Skip Dickstein/Times Union Archive)