The rated wind speeds of all domestic and foreign 1.5MW wind turbines including Vestas, Gamesa, GE, Goldwind and Sinovel are within the range of 11~12m/s. What's more, the impeller diameter of 70 meters is relatively small, so it needs to be installed in a wind area with relatively good wind resources, and the rated wind speed needs to be higher.
It should be about 55m/s. This number is close to the terminal velocity of the human body in free fall. The terminal velocity of free fall is the speed when wind resistance = gravity. To stay upright in the wind, the wind speed needs to be smaller than 55m/s. If it is considered upright if it is tilted below 10 degrees, the wind speed cannot exceed 26m/s. If the shoe/foot is stationary relative to the ground, it does not count as flying, you need to consider the static friction coefficient between the shoe/barefoot and the ground. Shoes are considered rubber. The friction coefficient between rubber and dry asphalt/cement is about 0.6-0.9. The wind speed exceeds 30m/s and it can remain stationary. The friction coefficient between human skin and other materials has not been found, and it should also exceed 30m. /s bar. Digression: If you do the experiment, you may be able to conduct it in water. The resistance of water is 800 times that of air. Then dimensional analysis can determine the required speed in air. However, the buoyancy factor that can be ignored in the air is not known how to eliminate it in the water. Digression: According to the relationship between the area (subject to wind resistance) and the volume (weight) of the square and the third power, it is more difficult for a fat man to be blown up. We Some of the scenes you see in movies don't happen in reality: people who get shot don't fly backwards, and the vacuum doesn't make your skin explode. But strong winds can definitely blow someone up. In fact, if you were standing in a parking lot, the wind would not only blow you away, it would even chip away a layer of the road surface! When wind speeds reach 120 an hour, no matter how much you lean forward, you won't be able to stand; you'll slide backwards on the ground at first, and soon fall over and start somersaulting. But you are less likely to be "thrown" very high by the wind. If the wind blows completely horizontally, you'll be stumbling and tumbling along. If you are lucky enough to hit a slope, you will easily fly up into the sky and fall far away. The good news is that 500 km/h winds are very rare. The strongest hurricanes can reach wind speeds of about 200 kilometers per hour, and gusts can even reach speeds as high as 250 kilometers per hour. Tornadoes can reach speeds of 300 miles per hour. But it's still far from 500 miles per hour. A 500 mph wind generates many times the force of a 300 mph wind.