The radio-controlled aircraft does 882 km / h – without an engine

The speed record in radio-controlled is the battle. Spencer Lisenby’s glider reached 882 km / h, just by skillfully utilizing the winds.

The radio-controlled glider has a wingspan of 3.3 meters and was created by the company DSkinetic. There, Spencer Lisenby works everyday as a prototype designer – and at Parker Mountain, north of Los Angeles, he broke the world record for radio-controlled aircraft by reaching 882 km / h. It reports New Atlas.

The technique he has used to gain speed is dynamic gliding. There, one repeatedly moves between air masses whose horizontal velocity differs greatly, and in this way the kinetic energy is increased.

Many who fly radio-controlled gliders engage in so-called slope soaring, where they take advantage of the fact that winds that move up to a height increase in speed. It can give an incredibly long time in the air, but in general you should then beware of ending up in the wind on the lee side of the hill because it will move at a completely different speed, or even stand still.

Can create turbulence

The meeting can create turbulence, and wind shear has contributed to aircraft suddenly losing their lift. But for 20 years there has been a group of enthusiasts who have been experimenting with exploiting the phenomenon. Then the aircraft is constantly exposed to 60-80 g, but it can be as much as 120 g.

By making a repeated oval loop through the air bearings, the aircraft can pick up the tailwind before the dive and then get more speed in the dive than what is consumed when climbing up the leeward side. For each loop, the speed increases, and so Spencer Lisenby was able to achieve the breathtaking record speed. However, he himself believes that the absolute maximum speed is 933 km / h.

Source: Nyteknik – Senaste nytt by

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