Abstract

On John Isaac's 1952 Measurements of Surface-Ship and Submarine Wakes

Highlights

  • U P O N LEARNING of some very interesting new work on the properties of ship wakes as measured by airborne radar and other modern means

  • In a proposal to the Navy dated 11 June 1952, lsaacs wrote: "I propose to discuss the possible implications of some conspicuous differences between the hydrodynamic processes involved in the propulsion of surface vessels and snorkeling submarines," and "I propose to examine the velocity and vorticity of the surface wakes at a series of points astern . . . by laying out a long flexible cylindrical float and a series of free floats normal to the wakes, recording subsequent positions of these floats by aerial photography," and "'If these methods give promising results, electronic approaches will be considered."

  • For the surface-ship wake, there is a net momentum in the aft direction; for the snorkeling submarine wake, the momentum integrated across the wake is zero

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Summary

Introduction

U P O N LEARNING of some very interesting new work on the properties of ship wakes as measured by airborne radar and other modern means In a proposal to the Navy dated 11 June 1952, lsaacs wrote: "I propose to discuss the possible implications of some conspicuous differences between the hydrodynamic processes involved in the propulsion of surface vessels and snorkeling submarines," and "I propose to examine the velocity and vorticity of the surface wakes at a series of points astern .

Results
Conclusion

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