Ключевые слова: aeronautical, aeronautics, aeroplane, aerospace, air force, aircraft, aircrew, airplane, armed forces, aviation, aviator, defence, defense, flight, fly, flying, formation, formation flying, military, military aviation, officer, pc21, pc7, pc9, pilatus, pilatus aircraft, pilatus pc21, pilatus pc7, pilatus pc9, pilot, pilot training, plane, propeller, swiss air force, swiss military, switzerland air force, switzerland military, trainer, trainer aircraft, trainman aircraft, turboprop,