Transformation of closed form : design projection to "inhabit" cylindrical grain containers

Thesis (M. Arch.)--Massachusetts Institute of Technology, Dept. of Architecture, 1989.Includes bibliographical references (p. 93-97).This thesis proposes the direct building of physical-spatial continuities with a generous range of sizes, from site size down to human size, producing an environment of multi-optional use. The work is partially reaction to certain modem tendencies in architecture that reduce the built landscape to closed, object-like, discrete physical elements. The disparity in the range of sizes from large to small intensifies the discontinuity in contemporary, mid-to-high density urban environments. The design exploration entails the transformation of an abandoned series of packed cylindrical grain containers to a structure habitable as a mid-rise (10-12 stories) three dimensional built landscape. References describe select problems and examples of: the circle as a geometric construct and some of its intrinsic behaviors the circle-cylinder in architecture built landscape transformations.by Daniel S. Krynytzky.M.Arch

Aerodynamics of Battle-damaged Finite-Aspect-Ratio Wings

Wind-tunnel tests have been carried out on a battle-damaged NACA 641412 half-wing aspect ratio of 8.2. The simulated gunfire damage had a diameter of 0.2 wing chord and was located at midchord and at one of two spanwise locations. Tests were carried out at a Reynolds number of 5:5 105. Compared with an undamaged wing, the damage resulted in reduced lift, increased drag and a positive increase in pitching moment at zero lift. Moving the damage to near the tip reduced the magnitude of these effects. Using the static pressure difference between the upper and lower surfaces of the undamaged wing allowed the data from the present study to be successfully compared with previously published drag and lift data for a two-dimensional damaged airfoil. Tests on wings with aspect ratios of 6.2 and 10.3 produced similar trends in the aerodynamic characteristics and showed that the use of static pressure difference was equally effective in allowing comparisons with two-dimensional data