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A small boat stuffing box comprising an adjusting nut, a locking nut and a sleeve. On a boat having an inboard motor that turns a shaft attached to an external propeller, the shaft passes through a stuffing box, also called a "packing box" or "stern gland" in this application. The stuffing box prevents water from entering the boat's hull.
The primary component of the Mk 38 is the 25 mm M242 Bushmaster. It is an externally-powered, chain-driven gun. The Bushmaster uses an electric motor to drive the moving parts for ammunition feeding, loading, firing, extraction, and cartridge ejection. [2] The mass of the M242 on the Mark 38 MGS is 109 kg (240 lb). [3]
Textron Marine & Land Systems, formerly Cadillac Gage, is an American military contractor that manufactures armored vehicles, turrets, advanced marine craft, surface effect ships, and other weapon systems. It is owned by Textron, and was formed in the merger between Cadillac Gage and Textron Marine in 1994. [1]
The PT-76 is amphibious, it has a flat, boat-shaped hull which is hermetical and ensures minimal resistance when the tank is afloat. It can swim after switching on the two electric bilge pumps, erecting the trim vane which improves the vehicle's stability and displacement in the water and prevents water from flooding into the bow of the tank.
The Mark 6 turret was designed for depression of the guns to −4° and elevation to 13°. [24] By 1916, the turrets and guns were considered woefully obsolete, and were subsequently removed and replaced with open gun platforms, each with a single 4"/40. These guns were then later replaced with 5"/51-caliber guns in 1917.
The design was patented. Doxford's first ship, Turret, was notable for her abnormally long and wide hatches in the turret, and self-trimming due to the rounded shape in the upper hold and lower turret. She was thus ideal for grain. [6] Turret was designed for tonnage of 4,700 DWT at a load line draft of 20 feet 3 inches (6.2 m) at 2,850 GRT. [7]
The Tucker gun turret was a fast-traversing electrically powered gun turret widely described as having been mounted on World War II bombers and on some ground vehicles and small naval vessels like US Navy PT boats. [1] [2] [3] American industrialist Preston Tucker first developed the turret for the experimental Tucker armored car in 1938.
The turret consists of upper and lower parts, joined by a trunnion. The gap between these two parts is often covered by a visible rubber or canvas bellows. The gun itself is fixed to the upper part of the turret. Elevation of the gun is achieved by tilting the entire upper part of the turret. In conventional designs, the gun is mounted inside ...