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Tests of Materials and Packaging Methods for Use in Aircraft Windshield Bird-Impact Simulation

机译：用于飞机挡风玻璃鸟撞模拟的材料和包装方法的测试

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Materials whose impact characteristics were compared with those of a bird carcass were putty, moist modeling clay, ground beef and chunk beef. Comparison was made through the measurement of the kinetic energy transferred on impact from the test material into a heavy pendulum. This testing method showed that the energy transfer characteristics on impact for clay, ground beef and chunk beef were quite close to those of a bird carcass in the velocity range between 115 and 300 knots. Between 300 and 400 knots impact velocity the characteristics of ground beef and chunk beef compared closely to the bird carcass, with chunk beef being more representative. A method of packaging the substitute materials was developed utilizing a 9-inch long by 6-inch diameter styrofoam carrier with the forward end hollowed to provide a container for the material. This method was found to increase the efficiency and control of the compressed air gun procedure for accelerating a test projectile. Above 300 knots (40 p.s.i.g. air gun pressure) the projectile package had a tendency to rupture during the initial acceleration stroke.

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