Robert Vess, a lecturer in mechanical and aerospace engineering at North Carolina State Univeristy, Raleigh, N.C., installs the window flange trim on a full-size engineering model of the HL-20 lifting body for the NASA Langley Research Center. The model, which is approximately 29 feet long, was built by NCSU and North Carolina Agricultural and Technical Univeristy, Greensboro, N.C., for studying crew seating arrangements, habitability, equipment layout, crew ingress and egress, and maintance and handling operations. The studies will take place at Langley and at the NASA Johnson Space Center, Houston, Texas.
