Sinus tachycardia (often referred to as sinus tach) is a rhythm which is formed by the electrical impulse originating in the SA node in the normal manner. However, the rate is faster than normal. The normal heart rate range is 50-100 beats per minute in adults. The rate in the example above is 150 beats per minute.
Wright Flyer. The Wright Flyer (often retrospectively referred to as Flyer I or 1903 Flyer) was the first successful heavier-than-air powered aircraft. It was designed and built by the Wright brothers. They flew it four times on December 17, 1903, near Kill Devil Hills, about four miles south of Kitty Hawk, North Carolina, US. Today, the airplane is exhibited in the National Air and Space Museum in Washington D.C.
Most people think about Orville and Wilbur Wright. And, December 17, 1903 is the day to remember. That was the day that Orville won the toss of the coin. He made the first successful powered flight in history! The place was Kitty Hawk, North Carolina. The Wright Brothers' dream of inventing a flying machine had come true.