Many Christians celebrate Easter Sunday as the day of Jesus Christâs resurrection, which is written in the New Testament of the Christian bible. According to the Gospel of John in the New Testament, Mary Magdalene came to the tomb where Jesus was buried and found it empty.
Say you want to face off a 4-inch diameter part and want to achieve very high and consistent surface finish. So you run it fast, at 3,000 surface feet. You have a 6,000-rpm lathe and extraordinary faith in your chuck to hold on to the part.
To the hub, the turbines are 229 ft. tall with 136 foot blades, meaning the height from the base to the tip the blade is 365 ft. The bases of the turbines are 11-16 feet in diameter and the foundations, which run 30 ft, into the ground, are 15.6 ft across. Each wind turbine weighs roughly 1450 tons. How do they work? Wind Turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity. How fast do the blades turn? At the optimum wind speed of 25-35 mph, the blades will rotate at 14 rpm. That gives them a speed of 105 mph at the tip. How much electricity do they produce? Each turbine produces about 2,000,000 kilowatt hours (kwh) per year, enough energy to power as many as 500 typical homes at 12,000 kwh per year. How strong do the winds have to blow for the blades to rotate? Wind turbines start operating at wind speeds of around 8 mph and reach a maximum power output at around 33 mph. When there is not enough wind to turn the blades, or when there is too much wind the turbines shut down.