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ما هي الطائرة فوق الصوتية ؟

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ما هي الطائرة فوق الصوتية ؟

كسر حاجز الصوت لأول مرة عام 1947 عندما اختبر الطيار تشارلز بيجر الطائرة التجريبية بل إكس-1 . واليوم تطير الطائرة الأنجلوفرنسية الكونكورد بانتظام بسرعات تفوق الصوت . وتتغير سرعة الصوت بتغير الضغط الجوي ودرجة الحرارة ، وتبلغ 670ميلا/ساعة عند مستوى سطح البحر 660ميلا /ساعة على ارتفاع 40000 قدم . وبينما تقترب سرعة الطائرة من سرعة الصوت ، يزداد ضغط الهواء أمام الطائرة مكونا حاجزا وتجاوز سرعة الصوت يحدث موجة صدمية ( فرقعة صوتية ) تجعل الطيار يفقط السيطرة على الطائرة . والطائرة فوق الصوتية مثل الكونكورد مجهزة لتحمل هذا التأثير .

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