General Dynamics

About: General Dynamics is a company organization based out in Fairfax, Virginia, United States. It is known for research contribution in the topics: Signal & Propellant. The organization has 5722 authors who have published 5819 publications receiving 85768 citations. The organization is also known as: GD & General Dynamics Corporation.

The Characteristics of Syntactic Foams Used for Buoyancy

Abstract: submersibles for both military and scientific research needs. Although the greatest marine technological breakthrough of the era has been the development of the nuclear-powered military submarine, this development has been paralleled both in numbers and capabilities by the evolution of deep-submergence research submarines. Throughout the design and construction phases of these varied submersibles, one of the basic problems encountered has been the strength-toweight characteristics of their structures. The increased operating depths desired of modem submarines have led to increases in hull weight due to the greater strength required of the hull operating under greater pressures. This has also produced corresponding reduction in weight margins, which often severely limit the payload of such vehicles. The use of supplemental buoyancy has been one method of improving the weight and displacement characteristics of these submarines. A number of articles have been published which review in detail the characteristics of a wide

A note on the bathtub vortex

Abstract: Observations were made of the vortex motion which occurs when a liquid is draining from a vessel through a hole in its bottom. It was found that, for relatively quiescent initial conditions, the direction of rotation reversed as the liquid surface approached the bottom of the vessel. An explanation of this phenomenon is proposed which is based upon the vorticity associated with the circumferential component of the flow in the boundary layer on the bottom of the vessel.