The lengths of the mounting plates are increased symmetrically from aft to forward so that the section of the track forward of the release trap lies at an angle of five degrees above the horizontal. It was deployed on convoy escort warships such as destroyers and corvettes to supplement the depth charges. A further safety measure is provided in the form of a spring loaded pin, extending from the crankhandle into a guide bolted to the top of the connecting rod. In June 1943, the deficiencies of Japanese depth-charge tactics were revealed in a press conference held by U.S. Because these bars do not require rapid removal, they are usually of the type secured with nuts. These are for the purpose of removing safety forks and the knobs of pistol covers when depth charges are released. [21], The high explosive in a depth charge undergoes a rapid chemical reaction at an approximate rate of 8,000 metres per second (26,000 ft/s). 7. The final step in operation is to return the double pawl assembly to its secure position and the track is again in the condition of figure 22A, ready for release of the next charge. We don't know about any in-box reviews for this Mk11 Mod 3 Depth Charge (#AIR.AC-170) from AIR-GRAPHICS MODELS. ERECTED IN NO. You can change your Cookie settings at any time. This is a steel rod passed through the forward pair of stanchions with a nut welded to its inboard end. Depth Charge Release Track Mk 3 Mods 0, 1 and 2. When the charges have taken their new positions, the pawls will drop again and the track and depth charges are back in the positions of figure 10A. These are used when ready condition of the track is not desired, and provide further protection against, For safe stowage, when ready condition is not required, a safety bar may be mounted between the, Wiping Plates. The installation of a loading tray at the forward end of these tracks is authorized at the request of commanding officers and where Navy Yard availability permits. The escapement arms are accurate castings mounted on a shaft and joined at their after ends by a rod. [5] Specialized depth charge throwers were developed to generate a wider dispersal pattern when used in conjunction with rack-deployed charges. Depth Charge Release Track Extension Mk 7 Mod 1, 42. 1. Guard against corrosion by keeping all exposed bearing surfaces coated with preservative grease, applying grease to detent shaft bearings, and keeping the rest of the track well painted. The K-gun, standardized in 1942, replaced the Y-gun as the primary depth charge projector. [9] The change of explosive to Torpex (or Minol) at the end of 1942 was estimated to increase those distances to 26 and 52 ft (7.9 and 15.8 m). The after detent has rotated forward and down, releasing the after depth charge to roll over it; and the forward de-tent has rotated upward to bear against the next. Slide the detents clear of the detent shafts and remove the shafts. Depth Charge Release Track Extension Mk 7 Mod 0, 40. The Mark 46 was initially developed as REsearch TORpedo Concept I, one of several weapons recommended for implementation by Project Nobska, a 1956 summer study on submarine warfare. The effect of the secondary shock wave can be reinforced if another depth charge detonates on the other side of the hull in close time proximity to the first detonation, which is why depth charges are normally launched in pairs with different pre-set detonation depths. Submarines or surface ships may be damaged if operating in the convergence zones of their own depth charge detonations. Remove connecting rod from bell crank of release trap and from track control lever. [4], The United States requested full working drawings of the device in March 1917. It projected multiple small anti-submarine bombs simultaneously, 10 from each side of the ship's forecastle, each containing 20 pounds of explosive.

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