A couple of good machining turbine blades images I found:
Turbines and Towers
Image by brewbooks
Turbines and Towers
127 wind turbine generators, spanning across 9,000 acres near Ellensburg, Washington.
Towers are 221 ft high at hub, 13.2 ft wide base and 7.six ft wide at prime and weigh 104 tons. Each and every turbine consists of three-blades, 129 ft extended, 11.62 ft at widest and 1.6 ft at tip with each and every blade weighing 14,300 lbs. The rotor (blades, hub and nose cone) weighs 42 tons.
Turbine generators are V80-1.8 MW machines manufactured by Vestas, a Danish firm. Every generator can generate 690 volts, which is stepped-up to 34,500 volts by an on-board transformer. The generator is housed inside a fiberglass nacelle.
The generator and nacelle together weigh 69 tons.
Total height with a blade totally extended is 351 ft and total weight is around 270 tons. These are the biggest wind turbine generators in Washington State (as of 2007)
Each and every tower foundation reaches a minimum depth of 25 ft and a maximum of 32 ft depending on bedrock depth and takes an average of one hundred to 260 cubic yards of concrete. Every foundation requires 120 anchor bolts that span from the surface of the ground to the bottom of the foundation. A single 28 ft anchor bolt weighs approximately 150 lbs.
Rotors turn 15.5 rpm, turning clockwise (front view) with a rotor diameter of 264 ft, larger than a wingspan of a Boeing 747.
Turbines can produce electrical energy at wind speeds as low as 9 mph, reaching their peak of production at 31 mph and shut down at continuous wind speeds of 56 mph. The prevailing winds are from the northwest.
Each and every turbine is capable of creating 1.eight megawatts, or a total of 229 megawatts of capacity, enough electrical energy to serve roughly 73,000 houses when all 127 are producing at complete capacity.
Swedish Tank Stridsvagn 103. Шведский танк Strv 103.
Image by Peer.Gynt
The Army Museum. Stockholm.
The Stridsvagn 103 or Strv 103 ("Stridsvagn" being calqued from the German word ‘kampfwagen’, which means combat automobile), also recognized unofficially as the S-Tank, was a Swedish post-war principal battle tank. It was recognized for its unconventional turret-less design, with a fixed gun traversed by engaging the tracks and elevated by adjusting the hull suspension.
The S-Tank was developed in the 1950s and was the initial primary battle tank to use a turbine engine. The outcome was a really low-profile design with an emphasis on defense and heightened crew protection level. S-Tanks formed a key portion of the Swedish armored forces from the 1960s to portion of the 1990s, but have given that been removed from service in favour of the Leopard two.
History
In the mid-1950s the Swedish army put out a contract tender for a new tank style to replace their Centurions. A consortium of Landsverk, Volvo and Bofors responded with a new heavy tank design, recognized below the codename KRV, fitted with a 155 mm smooth-bore gun in an oscillating turret. However this would be an high-priced alternative and the Army began looking at British, German and American tanks.
Then, in 1956, Sven Berge of the Swedish Arms Administration proposed Alternativ S, a domestic alternative (S standing for Swedish). Noting that the risk of becoming hit in combat was strongly connected to height, he proposed that any new design should be as low as achievable. The only sensible way to do this was to remove the turret (which would also make the tank considerably lighter and easier), although in terms of absolute height, this nonetheless did not give the Strv 103 any substantial advantage. Its most most likely opponent, the T-64, was only 2.2 meters in height with its turret versus the 2.14 meters of the Strv 103 (a mere three.5 inches reduced). Even so, T-64’s sacrifice for its low height was an very cramped interior. Tanks occasionally deploy themselves into hull-down firing positions, either purpose dug or making use of the crest of a hill, in order to minimize the exposure of the automobile to enemy fire. In this firing position the level of exposure is determined by the distance among the bottom of the gun barrel to the leading of the turret or vehicle, and the angle to which the automobile is able to depress the gun barrel. Given that the Strv 103 orients the whole tank to depress and elevate the barrel, in a hull down position it has a extremely low apparent height and subsequent visual profile to the enemy. It could also reduced the hull a further 13 cm by adjustment of the suspension.
Berge’s design and style attempted to resolve the aiming issue by means of the use of a completely automated transmission and suspension system, which would turn and tilt the tank beneath the gunner’s handle. The gun itself would be fixed to the hull. Sadly, this produced it not possible to use a stabilized gun. As a outcome, the tank could not accurately move and fire at the identical time. Nevertheless, during the period the S-tank was in service, turreted tanks hardly ever fired on the move, and especially not when employed defensively.[citation required]
Other features of the tank were also quite radical. The gun, a Bofors 105mm L/62, capable to use the exact same ammunition as the British 105 mm L7, would be equipped with an autoloader allowing a rate of fire of 15 rounds/minute, also permitting the crew to be decreased to two – most designs of the era utilized a crew of four – gunner/driver and commander. Room was obtainable for an additional crew member, the rear driver/radio operator, who faced the rear of the tank equipped with a complete setup for driving. This allowed the tank to be driven backwards at the identical speed as forwards, keeping its frontal armour pointed at the enemy.
The commander and gunner/driver each had the very same set of sights and controls to fire the gun and drive the tank. Furthermore the tank was powered by two engines, a 240 hp Rolls-Royce K60 opposed-piston diesel for cruising and manoeuvring the tank in aiming, and a 300 hp Boeing 502 turbine for dashing at higher speed. This was the very first use of a turbine engine in a production tank the Soviet T-80 and US M1 Abrams would later be constructed with gas turbines for main propulsion.
The idea was interesting enough that Bofors was asked to create a prototype of the suspension/drive train, which they completed effectively. In 1958 a follow-on contract named for two production prototypes, which had been completed in 1961. By this point, the army was so happy with the design and style that an initial pre-production order of 10 was placed in 1960. With minor changes, the S-Tank was adopted as the Stridsvagn 103 (103 from the reality that it was the third tank with a 10 cm gun accepted into Swedish service). Full production started in 1967 and ended in 1971 with 290 delivered. The modifications incorporated a new gyro-stabilised commander’s cupola armed with a 7.62 mm KSP 58 machine gun, and upgraded frontal armour. A screen, equivalent to those of the Panzer IV Ausf. J of World War Two, was offered to support defeat HEAT rounds nonetheless, it was kept secret for numerous years and was only to be fitted in the occasion of war.
The Strv 103 was fully amphibious. A flotation screen could be erected around the upper hull in about 20 minutes, and the tracks would drive the tank at about 6 kilometres per hour (three.7 mph) in water.
One particular tank in every single platoon was fitted with a blade below the front hull that permitted it to dig itself into the ground for added protection.
The Stridsvagn 103 never ever saw combat and so its design and style remains unproven. However, for its intended part in the 1960s it had numerous advantages. In 1967, Norway carried out a two week comparative observation test with the Leopard 1 and found that with closed hatches the 103 spotted a lot more targets and fired more rapidly than the Leopard. In April to September 1968, two 103s had been tested at the British armour college in Bovington, which reported that "the turretless idea of the "S"-tank holds considerable benefit over turreted tanks". In BAOR 1973, the 103 was tested against the Chieftain tank. Availability never fell under 90% and the final report stated, "It has not been attainable to prove any disadvantage in the "S" inability to fire on the move." In 1975, two 103s had been tested at the American armour center at Fort Knox. The trial demonstrated the 103 fired much more accurately than the M60A1E3, but on an average .five seconds slower.