SummaryThe position and strength of the front shock wave at large distances from a wing-body combination, are deduced from the linear theory for the combination, using a method developed by Whitham. The combination consists of a body of revolution and a wing which has thickness and is lifting. The effects of interference between the flow over the body and the flow over the wing are included. In any direction the flow far from the wing-body combination is equivalent to the flow past a body of revolution determined from the configuration of the combination. The modified formulae for unsteady flow are given and some results are evaluated for the combination of a body of revolution and a delta wing with subsonic leading edges.

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A procedure for predicting attenuation from explosive sources, which employs an accurate ray tracing method, has been obtained. Ray tubes, each consisting of a group of four rays surrounding a central ray, are launched from an initial surface close to the source. An invariant property of the ray tubes is used to allow calculation of peak pressure attenuation between a sphere of radius 100 m, centered on the source, and given ground points. Comparisons of these predicted attenuations with measured values are presented.

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