In what year was the first demonstration of a helicopter lifting itself organised by Louis Breguet and Professor Richet?
Louis Charles Breguet gyroplane (the forerunner of the helicopter) with flexible wings. On 29 September 1907, it achieved the first ascent of a vertical-flight aircraft with a pilot, albeit only to a height of . It was also not a free flight, as four men were used to steady the structure. He built his first fixed-wing aircraft, the Breguet Type I, in 1909, flying it successfully before crashing it at the Grande Semaine d'Aviation held at Reims. In 1911, he founded the Société anonyme des ateliers d’aviation Louis Breguet. In 1912, Breguet constructed his first hydroplane. He is especially known for his development
Breguet-Richet Gyroplane a 41 kW (55 hp) Renault engine, it was reported to have flown successfully more than once in 1908. No.II was damaged in a heavy landing and was rebuilt as the No.IIbis. It flew at least once in April 1909 before being destroyed when the company's works were badly damaged in a severe storm. Breguet-Richet Gyroplane The Breguet-Richet Gyroplane was an early French experimental quadcopter rotary-wing aircraft developed by Breguet Aviation. The Gyroplane No.I was one of the earliest attempts to create a practical rotary-wing aircraft. It was designed by the Breguet brothers with help from Professor Charles Richet. The