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Dock levelers (and indeed dock plates and dock boards) are used where a building has a truck-level door, i.e. a door with a floor level roughly at the same height as the floor of the truck's trailer. Some buildings only have drive-in doors, i.e. doors at the same level as the ground outside of the building, suitable for driving directly into ...
Factors that affect trailer creep are the weight and speed of the lift truck and load, the gradient of the ground the trailer is parked on, the condition of the suspension, tire air pressures, the type of transition being used (dock levelers, dock boards), and whether the trailer has been disconnected or if it is still connected to the tractor.
The Mark 48 was initially developed as REsearch TORpedo Concept II (RETORC II), one of several weapons recommended for implementation by Project Nobska, a 1956 summer study on submarine warfare. [9] The Mk-48 torpedo was designed at the end of the 1960s to keep up with the advances in Soviet submarine technology.
A schematic cross-section of a ship with anti-torpedo bulges. [nb 1] USS Texas with its starboard torpedo blister removed during ongoing repair work, showing the original hull underneath. Essentially, the bulge is a compartmentalized, below the waterline sponson isolated from the ship's internal volume. It is part air-filled, and part free ...
Mark 13 torpedo's general arrangement, as published in a service manual Douglas TBD Devastator making a practice drop with a Mark 13 torpedo, October 20, 1941. Originating in a 1925 design study, the Mark 13 was subject to changing USN requirements through its early years with resulting on-and-off development.
The Mark 7 was a major step in the evolution of the modern torpedo. [1] This innovative design featured the use of steam, generated from water sprayed into the combustion pot along with the fuel. The resulting mixture dramatically boosted the efficiency of the torpedo, leading to markedly improved performance. [3]