gim Project 1.5 - Drag Characteristics of Various Shapes - J.J. Meszaros OBJECTIVES MEVETE The primary objectives of Project 1,5 on Shot] CHEROKEE) were the investigation of aerodynamic drag characteristics of actual and idealized shapes when exposed to transient loading conditions resulting from a high yield nuclear detonation, The actual shapes consisted of wide flange I beams and angle beams, The idealized shapes consisted of 3 inch and 10 inch diameter spheres. INSTRUMENTATION wet Project 1.5 had four stations on Sho : (CHEROKEE). They 4 Were located on Bokobyaadaa (Able), man made islands one and two, and . on Yurocht (Dog). At Bokobyaadaa (Able) and Yurochi (Dog), there were I beam, angle iron and sphere stations. The other two locations had only beam stations, The sphere stations consisted of two 3 inch gages and one 10 inch gage. These gages measure the drag forces in three directions: lateral, and vertical, both positive and negative phases. ponent was measured by a four arm strain gage bridge. axial, Each come Each bridge is pre-stressed and any imbalance is recorded. The I beam was instrumented as a "simply supported" beam. was used to support each end of the beam, mented with strain gages. These sensors were instru- The strain gage bridge was so wired that any bending moment would be cancelled, A ball and socket joint was put on each end of the sensor to nullify torsion. recorded was compression. A sensor As a result the only strain The records were resolved into a drag force versus time curve. = 44