SR-71 Blackbird. Only the coolest airplane ever made . IMHO. Lotta stuff in this thread about it.
Heavy Metal
- Thread starter amazinblue82
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I was wondering where and when that picture was taken.
67newport
Old Man with a Hat
67newport
Old Man with a Hat
67newport
Old Man with a Hat
67newport
Old Man with a Hat
i think this is art ... Stan (Sam?) Stokes in the UK. Love his stuff .. cant afford it
67newport
Old Man with a Hat
67newport
Old Man with a Hat
67newport
Old Man with a Hat
Yamal
Nuclear-powered Russian icebreaker. Yamal, nearly 500 ft, double hull, 23K tons. We have something here on icebreakers -- the newer ones are bad-a** machines.
Nuclear-powered Russian icebreaker. Yamal, nearly 500 ft, double hull, 23K tons. We have something here on icebreakers -- the newer ones are bad-a** machines.
I have always thought the name "Icebreaker" is just badass!
67newport
Old Man with a Hat
Crewmen of USS Missouri (BB-63) paraded at quarters as the battleship steams toward New York City to participate in the Navy Day Fleet Review. Photographed in early October 1945
67newport
Old Man with a Hat
67newport
Old Man with a Hat
67newport
Old Man with a Hat
67newport
Old Man with a Hat
67newport
Old Man with a Hat
The Russians have the biggest, baddest icebreakers in the world. by far. The Artika-class boats.
Basically, icebreakers do their thing by taking a ride up on top of the ice, and the weight of the ship breaks it -- some add brute force and ram the ice, splitting in with propulsive force and a thick *** steel bow. Modern boats also blow compressed air through outlets along length of hull to help push broken ice away from the path.
The first Arktika (red boat below), launched in 1977, was decommissioned in 2008 . the Yamal (yellow boat below) in this thread at post #571 was launched in 1992 and tricked out to look like the boat the class is named for.
The stuff under the picturea is a bit dense, but if your're remotely into boats, you'll know what you're reading.
source: Arktika-class icebreaker - Wikipedia
Basically, icebreakers do their thing by taking a ride up on top of the ice, and the weight of the ship breaks it -- some add brute force and ram the ice, splitting in with propulsive force and a thick *** steel bow. Modern boats also blow compressed air through outlets along length of hull to help push broken ice away from the path.
The first Arktika (red boat below), launched in 1977, was decommissioned in 2008 . the Yamal (yellow boat below) in this thread at post #571 was launched in 1992 and tricked out to look like the boat the class is named for.
The stuff under the picturea is a bit dense, but if your're remotely into boats, you'll know what you're reading.
source: Arktika-class icebreaker - Wikipedia
The Arktika was a double-hulled icebreaker; the outer hull is 48 millimetres (1.9 in) thick, the inner 25 millimetres (0.98 in) thick, with the space in between utilized for water ballasting.
At the strongest point, the cast steel prow is 50 centimetres (20 in)) thick and bow-shaped to aid in icebreaking, the curve applying greater dynamic force to fracture the ice than a straight bow would.
The maximum ice thickness it can break through is approximately 5 metres (16 ft). Arktika also has an air bubbling system (ABS) which delivers 24 m3/s of steam from jets 9 metres (30 ft) below the surface to further aid in the breakup of ice.
Over the period December 1967 to May 1970, Lenin, precursor of the Arktika anirst nuclear-propelled icebreaker, had its three OK-150 reactors, capable of 90 MW each, replaced with two OK-900 reactors, capable of 159 MW each.. T
Arktika and the entire Arktika-class icebreaker fleet are outfitted with two OK-900A reactors, which deliver 171 MW each. Each reactor is contained in its own closed compartment and weighs 160 tonnes. They are shielded by water, steel, and high density concrete, and ambient radiation is monitored throughout the ship by 86 sensors.
The reactors were originally fueled by a 90% enriched, zirconium-clad, uranium fuel. Those reactors still in operation today now use a 20%-90% enriched with 60% average enrichment uranium dispersed in an aluminum matrix. The chain reaction can be stopped in 0.6 seconds by the full insertion of safety rods.
Arktika consumes up to 200 grams of fuel a day when breaking ice. There are 500 kg of uranium isotopes in each reactor, allowing for at least 13.7 years between changing reactor cores. The used cores are extracted and replaced in Murmansk, the spent fuel reprocessed and waste disposed of at a radioactive waste plant.
The OK-900A is a pressurized water reactor, meaning that cooling water is continually pumped under pressure through the reactor to remove heat, keeping the cores and the reactor cool. The heated water is pumped from the reactor to a boiler (four boilers per reactor), where it transfers its heat into another body of water, producing steam at a rate of 30 kg/cm3 (approx 1,084 psi.
Each set of four boilers drives two steam turbines, which turn three dynamos. One kilovolt of direct current is then delivered to three double-wound motors directly connected to the propeller, providing an average screw velocity of 120-180 rpm. Five auxiliary steam turbines are tied into the plant to provide electricity, turning generators with a cumulative electric power of 10 MW.
Three fixed-pitch propellers provide Arktika with its thrust, power, and maneuverability. The starboard and centerline propellers turn clockwise while the port turns counter clockwise to compensate. Each propeller sits at the end of a 20 meter (65.6 ft) shaft and has four blades, which weigh seven tons and are attached by nine bolts to the hub which is 5.7 meters (18.7 ft) in diameter and weighs 50 tonnes.
Arktika also carries four spare blades along with the appropriate diving equipment and tools so that propeller repairs may be made at sea; the operation can take anywhere from one to four days depending on the extent of the damage.
The propellers can deliver a combined bollard pull of 480 tons with 18-43 MW (25,000 shaft horsepower) [totals: 55.3 MW (75,000 shp)]. This amounts to a maximum speed of 22 knots (41 km/h; 25 mph) on open water, full speed of 19 knots (35 km/h; 22 mph), and an average speed of 3 knots (5.6 km/h; 3.5 mph) while icebreaking 2–3 metres (7–10 ft) thick level ice.
At the strongest point, the cast steel prow is 50 centimetres (20 in)) thick and bow-shaped to aid in icebreaking, the curve applying greater dynamic force to fracture the ice than a straight bow would.
The maximum ice thickness it can break through is approximately 5 metres (16 ft). Arktika also has an air bubbling system (ABS) which delivers 24 m3/s of steam from jets 9 metres (30 ft) below the surface to further aid in the breakup of ice.
Over the period December 1967 to May 1970, Lenin, precursor of the Arktika anirst nuclear-propelled icebreaker, had its three OK-150 reactors, capable of 90 MW each, replaced with two OK-900 reactors, capable of 159 MW each.. T
Arktika and the entire Arktika-class icebreaker fleet are outfitted with two OK-900A reactors, which deliver 171 MW each. Each reactor is contained in its own closed compartment and weighs 160 tonnes. They are shielded by water, steel, and high density concrete, and ambient radiation is monitored throughout the ship by 86 sensors.
The reactors were originally fueled by a 90% enriched, zirconium-clad, uranium fuel. Those reactors still in operation today now use a 20%-90% enriched with 60% average enrichment uranium dispersed in an aluminum matrix. The chain reaction can be stopped in 0.6 seconds by the full insertion of safety rods.
Arktika consumes up to 200 grams of fuel a day when breaking ice. There are 500 kg of uranium isotopes in each reactor, allowing for at least 13.7 years between changing reactor cores. The used cores are extracted and replaced in Murmansk, the spent fuel reprocessed and waste disposed of at a radioactive waste plant.
The OK-900A is a pressurized water reactor, meaning that cooling water is continually pumped under pressure through the reactor to remove heat, keeping the cores and the reactor cool. The heated water is pumped from the reactor to a boiler (four boilers per reactor), where it transfers its heat into another body of water, producing steam at a rate of 30 kg/cm3 (approx 1,084 psi.
Each set of four boilers drives two steam turbines, which turn three dynamos. One kilovolt of direct current is then delivered to three double-wound motors directly connected to the propeller, providing an average screw velocity of 120-180 rpm. Five auxiliary steam turbines are tied into the plant to provide electricity, turning generators with a cumulative electric power of 10 MW.
Three fixed-pitch propellers provide Arktika with its thrust, power, and maneuverability. The starboard and centerline propellers turn clockwise while the port turns counter clockwise to compensate. Each propeller sits at the end of a 20 meter (65.6 ft) shaft and has four blades, which weigh seven tons and are attached by nine bolts to the hub which is 5.7 meters (18.7 ft) in diameter and weighs 50 tonnes.
Arktika also carries four spare blades along with the appropriate diving equipment and tools so that propeller repairs may be made at sea; the operation can take anywhere from one to four days depending on the extent of the damage.
The propellers can deliver a combined bollard pull of 480 tons with 18-43 MW (25,000 shaft horsepower) [totals: 55.3 MW (75,000 shp)]. This amounts to a maximum speed of 22 knots (41 km/h; 25 mph) on open water, full speed of 19 knots (35 km/h; 22 mph), and an average speed of 3 knots (5.6 km/h; 3.5 mph) while icebreaking 2–3 metres (7–10 ft) thick level ice.
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