Ключевые слова: aerodynamics, air, aircraft, airplane, aviation, aviator, background, blue, cloud, flight, fly, flying, freedom, glider, gliding, high, hobby, landing, leisure, license, outdoor, pilot, plane, sailplane, silence, silent, sky, small, soar, soaring, speed, sport, thermal, touchdown, training, transportation, travel, twoseater, updraft, upwind, white, wind, wingspan,