Amazing Uncommon Flying Machines

Gyrocoptor


An autogyro (from Spanish autogiro), also known as gyroplane, gyrocopter, or rotaplane, is a type of rotorcraft which uses an unpowered rotor in autorotation to develop lift, and an engine-powered propeller, similar to that of a fixed-wing aircraft, to provide thrust. While similar to a helicopter rotor in appearance, the autogyro's rotor must have air flowing through the rotor disc in order to generate rotation. Invented by the Spanish engineer Juan de la Cierva to create an aircraft that could safely fly at slow speeds, the autogyro was first flown on 9 January 1923, at Cuatro Vientos Airfield in Madrid.[1] De la Cierva's aircraft resembled the fixed-wing aircraft of the day, with a front-mounted engine and propeller in a tractor configuration to pull the aircraft through the air. Under license from Cierva in the 1920s and 1930s, the Pitcairn & Kellett companies made further innovations.

Lamprechtsofen Cave - Austria


The Lamprechtsofen is located in the northermost outcrop of the Leoganger Steinberge. It is the youngest of the Dachstein Caves.

http://en.wikipedia.org/wiki/Lamprechtshausen


Since 2001.01.06 Lamprechtsofen is no longer deepest cave in the world. It was beaten by Voronya cave reexplored by Ukrainian - Russian team in Arabica massif in Caucasus mountains in Georgia.  Exploration of Lamprechtsofen is still in progress, and extending the depth of this cave still is possible. For geological reasons it can reach about 1720-1750.

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