A-6 Intruder in Action by Dr. Joe Michaels, Joe Sewell, Don Greer, Tom Tullis

By Dr. Joe Michaels, Joe Sewell, Don Greer, Tom Tullis

A-6 Intruder in motion КНИГИ ;ВОЕННАЯ ИСТОРИЯ A-6 Intruder in motion (Aircraft 138)ByJoe MichaelsPublisher:Squadron/Signal courses Inc.1993 50PagesISBN: 0897473027PDF19 MBDuring 1955 the Navy's lengthy variety goals research crew employees well-known that there has been a necessity for a brand new assault plane. This plane could complement the Douglas A-l Skyraider and Douglas A-4 Skyhawk, in provider with the sunshine assault squadrons and the Douglas A-3 Skywarrior and North American A-5 Vigilante in use with the heavy assault squadrons. The army sought after an assault airplane which could fly quicker, better, and hold a much bigger and extra refined number of guns over a better distance than the venerable A-l Skyraider or the light-weight A-4. one of many functions that the hot layout used to be to add was once the facility to fly low-level missions at evening and less than all climatic conditions. This requirement was once thought of to be of paramount importance.In February of 1957 Grumman bought sort Specification 149 in addition to Boeing, Douglas, Vought, Martin, Lockheed, Bell and North American Aviation. All of those compa­nies offered their proposed designs and by way of December of 1957 the contest have been diminished to Douglas, Grumman and Vought. On 30 December 1957 the army introduced that the Grumman airplane company, led through the layout group composed of Lawrence M. Mead, Robert Nafis and Bruce Tuttle, had received the layout competition.sharingmatrix letitbit zero

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Due to the present importance of harbor loops in designing detection systems for homeland security and port defense, a more in-depth technical analysis of its operation is warranted. The voltage at the output of the differential loops in Fig. 1 will be computed for a magnetized submarine sailing in a straight line across the loops. 1) where B is the magnetic signature produced by the submarine and d l is the differential length along the contour of the loop. cls October 16, 2006 22:12 EXPLOITATION OF MAGNETIC SIGNATURES BY SUBMARINE SURVEILLANCE SYSTEMS 43 where R2 + R1 , 2c R2 − R1 , ξ= 2c r = 1/2 , 2 1/2 , R1 = (x + c )2 + y 2 + z2 R2 = (x − c )2 + y 2 + z c = a2 − b2 1/2 , and a is half of the major axis, while b is half of the minor axis.

Conversely, if the mine is set too insensitive it will miss targets that it could have heavily damaged or even sunk. Setting mines too insensitive could result in a catastrophic failure of the minefield presenting no threat to the transiting vessels. For these reasons, a naval vessel’s signature characteristics (amplitude and shape) are also closely guarded. 3 29 MAGNETIC MINE COUNTERMEASURES Mine warfare, and in particular MCM strategies, are complicated. The risk in losing a ship or submarine to a mine is very scenario dependent, and is sensitive to many parameters including: 1.

3(a). As the gas bubble produced by the explosion collapses, its bottom moves up faster than its top goes down. The momentum of the water causes a new secondary bubble to form closer to the hull, imparting a second shock to the hull along with a jet of water (Fig. 3(b)). The combination of shocks partially lifts the ship out of the water causing it to flex violently, whipping it in half (Fig. 3(c)). The separated aft portion of the destroyer sank quickly leaving just the forward half afloat (Fig.

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