thermaling

thermaling: (спортивное) дельтапланеризм в восходящих потоках теплого воздуха

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Paragliding — is a recreational and competitive flying sport. A paraglider is a free flying, foot launched aircraft. The pilot sits in a harness suspended below a fabric wing, whose shape is formed by the pressure of air entering vents in the front of the wing … Wikipedia
Lift-to-drag ratio — In aerodynamics, the lift to drag ratio, or L/D ratio ( ell over dee in the US, ell dee in the UK), is the amount of lift generated by a wing or vehicle, divided by the drag it creates by moving through the air. A higher or more favorable L/D… … Wikipedia
gliding — ▪ sport also called soaring flight in an unpowered heavier than air craft. Any engineless aircraft (airplane), from the simplest hang glider to a space shuttle on its return flight to the Earth, is a glider. The glider is powered by… … Universalium

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