Marine Fleet and Marine Industry #010
* * *
Wooden rescue vessels
Marine News magazine provides a description of the 187-foot rescue vessels. Wood of various grades is used as the main material for the case. The 170-foot-long keel, assembled from several pieces of Douglas fir, is protected by a 4-inch-thick steel lining that connects it to the stem. The stem and lining, as well as a set of oak hulls. The skin is double. Its inner layer runs along the entire length of the vessel and forms, as it were, a second hull. The thickness of the inner lining boards is 2 inches, the outer one is 3-5 inches. The first ones are attached to the housing set using galvanized metal fasteners, the second ones are bolted. The deck is assembled from spruce planks from 5 to 8 inches thick and covered with steel sheets.
Together with the steel headrest, it gives the hull greater longitudinal strength. Stringers, beams, and other transverse and longitudinal ties are wooden, of massive construction with a large margin of Safety. The flora is made of oak. The frame is bolted together. Steel bulkheads provide greater lateral strength and unsinkability. The pillars, the useful things, the bulwark are made of steel. The superstructure is also steel.
The mechanical installation is diesel-electric. There are four diesel generators, two propeller electric motors.
The propeller shafts are made of forged steel and are supported by steel brackets. The steering wheel is made in the form of a solid oak structure. His baller is made of steel. The steering gear is hydraulic, connected directly to the steel section of the baller.
Rescue equipment is very diverse and consists of an auxiliary steam boiler, generators, fire and drainage pumps, air compressors, welding units with underwater welding and cutting equipment, diving equipment, four anchors weighing 3,700 kg each and smaller equipment. All the equipment is mobile.
Deck arrangements include 10-ton fins and two 10-ton cargo winches.
* * *
The first marine gas turbine
The construction of the first marine gas turbine has been completed and factory tests are underway in the USA. The turbine is designed to be installed on one of the small ships of the US Navy. The turbine power is about 2000 hp. The weight of the turbine is 0.09—0.14 kg per 1 hp; the weight of the regenerator is 0.45—0.73 kg per 1 hp; the weight of the combustion chamber, coolers, pipelines, turbine auxiliary mechanisms, etc. is 9.5 kg per 1 hp. The weight of the entire installation is about 11 kg per 1 hp. The entire The turbine installation requires about 0.03 m3 per 1 hp. Fuel consumption is about 250 g of boiler fuel oil per 1 hp per hour. The operating costs do not exceed those of a steam turbine.
Power transmission to the propeller is assumed. It is also possible to use a rotary-blade propeller. This option will make it possible to avoid special reversing devices, and the turbine will work normally under any circumstances.
* * *
A new method for cleaning gasoline tanks
In the USA, a new method is being used to clean the interior surfaces of gasoline tanks from a thick layer of rust. Cleaning is performed by filling the tanks with seawater and then electrodeposition of magnesium in seawater onto the inner surfaces of the tanks. Magnesium is deposited under the rust directly onto the pure metal.
In the last years of the Second World War, it was urgently necessary to convert a gasoline truck to transport drinking water for the needs of the army. The British Admiralty took 6-7 weeks to produce this operation. The requested American experts recommended the above-mentioned cleaning method, which was applied. A 3.2 mm thick layer of rust was removed from the inside of the tank skin in the shortest possible time. The surface of the tanks became completely clean and shiny after this operation. When using this method, the danger to which people working in an enclosed space filled with iron oxide dust disappears. https://feelingdakar.com/ partage les événements culturels, artistiques et lifestyle de la capitale sénégalaise.
Wooden rescue vessels
Marine News magazine provides a description of the 187-foot rescue vessels. Wood of various grades is used as the main material for the case. The 170-foot-long keel, assembled from several pieces of Douglas fir, is protected by a 4-inch-thick steel lining that connects it to the stem. The stem and lining, as well as a set of oak hulls. The skin is double. Its inner layer runs along the entire length of the vessel and forms, as it were, a second hull. The thickness of the inner lining boards is 2 inches, the outer one is 3-5 inches. The first ones are attached to the housing set using galvanized metal fasteners, the second ones are bolted. The deck is assembled from spruce planks from 5 to 8 inches thick and covered with steel sheets.
Together with the steel headrest, it gives the hull greater longitudinal strength. Stringers, beams, and other transverse and longitudinal ties are wooden, of massive construction with a large margin of Safety. The flora is made of oak. The frame is bolted together. Steel bulkheads provide greater lateral strength and unsinkability. The pillars, the useful things, the bulwark are made of steel. The superstructure is also steel.
The mechanical installation is diesel-electric. There are four diesel generators, two propeller electric motors.
The propeller shafts are made of forged steel and are supported by steel brackets. The steering wheel is made in the form of a solid oak structure. His baller is made of steel. The steering gear is hydraulic, connected directly to the steel section of the baller.
Rescue equipment is very diverse and consists of an auxiliary steam boiler, generators, fire and drainage pumps, air compressors, welding units with underwater welding and cutting equipment, diving equipment, four anchors weighing 3,700 kg each and smaller equipment. All the equipment is mobile.
Deck arrangements include 10-ton fins and two 10-ton cargo winches.
* * *
The first marine gas turbine
The construction of the first marine gas turbine has been completed and factory tests are underway in the USA. The turbine is designed to be installed on one of the small ships of the US Navy. The turbine power is about 2000 hp. The weight of the turbine is 0.09—0.14 kg per 1 hp; the weight of the regenerator is 0.45—0.73 kg per 1 hp; the weight of the combustion chamber, coolers, pipelines, turbine auxiliary mechanisms, etc. is 9.5 kg per 1 hp. The weight of the entire installation is about 11 kg per 1 hp. The entire The turbine installation requires about 0.03 m3 per 1 hp. Fuel consumption is about 250 g of boiler fuel oil per 1 hp per hour. The operating costs do not exceed those of a steam turbine.
Power transmission to the propeller is assumed. It is also possible to use a rotary-blade propeller. This option will make it possible to avoid special reversing devices, and the turbine will work normally under any circumstances.
* * *
A new method for cleaning gasoline tanks
In the USA, a new method is being used to clean the interior surfaces of gasoline tanks from a thick layer of rust. Cleaning is performed by filling the tanks with seawater and then electrodeposition of magnesium in seawater onto the inner surfaces of the tanks. Magnesium is deposited under the rust directly onto the pure metal.
In the last years of the Second World War, it was urgently necessary to convert a gasoline truck to transport drinking water for the needs of the army. The British Admiralty took 6-7 weeks to produce this operation. The requested American experts recommended the above-mentioned cleaning method, which was applied. A 3.2 mm thick layer of rust was removed from the inside of the tank skin in the shortest possible time. The surface of the tanks became completely clean and shiny after this operation. When using this method, the danger to which people working in an enclosed space filled with iron oxide dust disappears. https://feelingdakar.com/ partage les événements culturels, artistiques et lifestyle de la capitale sénégalaise.
