Showing posts with label History of Aeroplane. Show all posts
Showing posts with label History of Aeroplane. Show all posts

Monday

--> History of Aeroplane


Glenn Curtiss at the controls of an experimental aircraft.
Glenn Hammond Curtiss was born on May 21, 1878, in Hammondsport, New York, near Keuka Lake, one of the Finger Lakes in upstate New York. He received little formal education and his father died when Glenn was only five years old. The family made a meagre living from the vineyard they cultivated in their front yard. In 1900, he took over a bicycle repair shop (ironically, just the profession the Wrights had chosen), and he soon established a reputation as a speedster. Speed, in fact, was to become an obsession for Curtiss all his life.
He was a champion cyclist in 1900, and in 1901 he added a motor to the bicycle and became a champion motorcyclist. By 1902, he was being asked to design motorcycles and engines for other racers, and in 1903 he opened a factory in Hammondsport, producing motorcycles and engines acknowledged to be the best—meaning, with the highest power-to-weight ratio. In 1904, Curtiss raced one of his machines at Ormond Beach, Florida, and established a land speed record of sixty-seven miles per hour over a ten-mile course, a record that stood for seven years. (In 1907, he set an unofficial world speed record on a motorcycle —136 miles per hour, a speed then unimaginable to most people.) Initially, Curtiss had little interest in aviation.
His first foray into the field was as the provider of engines for dirigibles built by Thomas Scott Baldwin. In 1904, a Baldwin dirigible, the California Arrow, became the first American dirigible to complete a circular course, and by 1906 Curtiss-powered Baldwin dirigibles were in demand across the country. Dirigibles were too slow to interest Curtiss, but he developed a lifelong friendship with Baldwin and had his first taste of flight piloting a Baldwin balloon. In August of 1906, a fateful meeting took place between Curtiss and the Wrights. Curtiss had accompanied Baldwin to the Dayton Fair to help him demonstrate his dirigibles; the Wrights also attended (and on one occasion even helped retrieve a dirigible that went astray).
Baldwin and Curtiss visited the Wright bicycle repair shop. By this time, the Wrights had become secretive as they awaited the protection of a patent. They would not show, their visitors their airplane, but, regarding the pair as mere balloonists with no interest in airplanes, they were very forthcoming with information about their work and discussed aeronautics at length with the visitors. What the Wrights did not realize at the time was that Curtiss had already delivered an engine to Alexander Graham Bell, the famous inventor of the telephone, and that plans were afoot to marry Curtiss’ engine-building abilities with the others’ aeronautic talents to create airplanes.
In the legal wrangling that subsequently arose between the Wrights and Curtiss, these August 1906 conversations were pointed to as the source of Curtiss’ work in aviation and formed the basis of the Wrights’ suit for patent infringement. (Interestingly, an almost identical set of circumstances lay at the heart of the patent suit over electronic computers brought by John Atanasoff against John Mauchly and J. Presper Ecker, and won by Atanasoff for the same reasons in 1973.) Curtiss was a complex individual, and it is difficult to determine his attitude completely.
Sometimes he seemed to be trying to avoid confrontation with the Wrights or provoking them; at other times he seemed bent on keeping them busy with litigation while he moved on to other areas of aviation. Curtiss’ failed 1914 attempt to prove that Langley’s Aerodrome was really the first machine capable of flight probably precluded any possibility of reconciliation. In 1915, Orville sold his share of the Wright company, and though the new owners continued the litigation, in 1917, after the United States entered World War I, the government created a patent pool for all aircraft devices created to that time, making the entire question an academic one.

Sunday

--> History of Aeroplane

1903 First Flight





Orville Wright (b1871-d1948) Wilbur Wright (b1867-d1912)

After studying, Lilienthal and Cayley, the Wright brothers flew their first gliders in 1899.

In 1900 they went to Kill Devil Hills, North Carolina to pursue the glider experiments. Orville and Wilbur became master glider builders and experts on wing aerodynamics through numerous experiments in a wind tunnel. Through their wind tunnel test, they found an error in Otto Lilienthal's lift formulas. They also discovered that the symmetrical curve of Lilenthal's wing was unstable and improved it by placing the apex of the curve about 1/4 distance back from the leading edge.While unpowered gliding had been accomplished previously, the Wright brothers took it a step further and desired to build a glider with an engine. They contacted several of the automobile manufacturers to see if they would build them an 8-horsepower motor that weighed less than 200 lbs. Unfortunately for the Wright brothers, none of the automobile companies had time for a special project that would provide no profit.After being turned down by the automobile industry, the brothers had no choice but to build their own engine. They asked their bicycle mechanic, Charles E. Taylor, for assistance. Charles was operating the Wright's bicycle shop in Dayton Ohio while the brothers were experimenting in North Carolina. In just six weeks, Taylor had completed their 12 horsepower engine with four cylinders, a 4" bore, and a stroke length of 4". The engine weighed 162 pounds. During the first two attempts to test the engine with the propeller attached, the shaft of the propeller broke due to engine vibration. Orville solved the problem by using stronger materials in the propeller.
After four years of experimenting with gliding and wind tunnels, the two mounted the engine upon the specially designed glider that would later become known as the 'Wright Flyer'. On December 17, 1903, Orville Wright piloted a 12 second powered flight while covering a distance of 120 feet (33.6 meters). Wilbur took the controls for the second flight and flew for about 175 feet (53 meters). For the third flight, Orville piloted the aircraft for 200 feet (61 meters). Alternating turns, Wilbur was back in the cockpit and flew for 800 feet (244 meters) when the frame began bucking which caused the aircraft to plummet to the ground. Total distance covered in the fourth flight was 852 feet (260 meters) in 59 seconds. The unexpected plunge damaged the front rudder and shut down flight operations for the day. These flights are disputably known as the first heavier-than-air flights to demonstrate controlled sustained manned powered flight.
The Wright Brothers were exponential in bringing attention to aviation by their numerous public displays of powered gliding. Over the years, the Wright brothers had more than 700 successful flights to their credit in the United States and Europe. The success enjoyed by the Wright brothers was largely attributed to their master mechanic abilities and their attention to detail. Most of their mechanical abilities were gained from the jointly owned bicycle shop that they operated in Dayton, Ohio before becoming glider architects.