Autopilot reducing the pilot's workload. Lawrence Sperry (the son of famous inventor Elmer Sperry) demonstrated it in 1914 at an aviation safety contest held in Paris. At the contest, Sperry demonstrated the credibility of the invention by flying the aircraft with his hands away from the controls and visible to onlookers of the contest. Elmer Sperry Jr., the son of Lawrence Sperry, and Capt Shiras continued work after the war on the same autopilot, and in 1930 they tested a more compact and reliable autopilot which kept a US Army Air Corps aircraft on a true heading and altitude for three
Church of the Holy Virgin Mary of Lourdes Church of the Holy Virgin Mary of Lourdes The Church of the Holy Virgin Mary of Lourdes () is a Roman Catholic church in Kraków, Poland, dedicated to Our Lady of Lourdes. It was founded by the Lazarists, and built in 1892–1894 at ul. Misjonarska 37 street in the district of Krowodrza. It has been a parish church since 1923. In interwar Poland, a polyphonic choir was established by the congregation in 1932. The Mariański Choir has attracted international acclaim for a number of years. The corner-stone for the construction of the church was laid on June 25, 1892, although