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.
Who Were the Wright Brothers? On May 25, 1910, Milton Wright took his first airplane flight. He had lived a long and busy life, working for his church, raising his family, and traveling. But he had never been in an airplane. Of course, in 1910, only a handful of people had! Two people who did have flying experience were Miltonâs sons, Wilbur and Orville Wright, who had invented the airplane in 1903. Milton had watched them grow from curious and hard-working boys into two of the most famous men in the world.