Drag CurvesWhen induced drag and parasite drag are plotted on a graph, terjemahan - Drag CurvesWhen induced drag and parasite drag are plotted on a graph, Bahasa Indonesia Bagaimana mengatakan

Drag CurvesWhen induced drag and pa

Drag Curves
When induced drag and parasite drag are plotted on a graph, the total drag on the aircraft appears in the form of a “drag curve.” Graph A of Figure 2-8 shows a curve based on thrust versus drag, which is primarily used for jet aircraft. Graph B of Figure 2-8 is based on power versus drag, and it is used for propeller-driven aircraft. This chapter focuses on power versus drag charts for propeller-driven aircraft. Understanding the drag curve can provide valuable insight into the various performance parameters and limitations of the aircraft. Because power must equal drag to maintain a steady airspeed, the curve can be either a drag curve or a power required curve. The power required curve represents the amount of power needed to overcome drag in order to maintain a steady speed in level flight. The propellers used on most reciprocating engines achieve peak propeller efficiencies in the range of 80 to 88 percent. As airspeed increases, the propeller efficiency increases until it reaches its maximum. Any airspeed above this maximum point causes a reduction in propeller efficiency. An engine that produces 160 horsepower will have only about 80 percent of that power converted into available horsepower,
Figure 2-9. Regions of Command. approximately 128 horsepower. The remainder is lost energy. This is the reason the thrust and power available curves change with speed.
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Drag CurvesWhen induced drag and parasite drag are plotted on a graph, the total drag on the aircraft appears in the form of a “drag curve.” Graph A of Figure 2-8 shows a curve based on thrust versus drag, which is primarily used for jet aircraft. Graph B of Figure 2-8 is based on power versus drag, and it is used for propeller-driven aircraft. This chapter focuses on power versus drag charts for propeller-driven aircraft. Understanding the drag curve can provide valuable insight into the various performance parameters and limitations of the aircraft. Because power must equal drag to maintain a steady airspeed, the curve can be either a drag curve or a power required curve. The power required curve represents the amount of power needed to overcome drag in order to maintain a steady speed in level flight. The propellers used on most reciprocating engines achieve peak propeller efficiencies in the range of 80 to 88 percent. As airspeed increases, the propeller efficiency increases until it reaches its maximum. Any airspeed above this maximum point causes a reduction in propeller efficiency. An engine that produces 160 horsepower will have only about 80 percent of that power converted into available horsepower,Figure 2-9. Regions of Command. approximately 128 horsepower. The remainder is lost energy. This is the reason the thrust and power available curves change with speed.
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Curves tarik
Ketika induced drag dan parasite drag diplot pada grafik, total drag pada pesawat muncul dalam bentuk "kurva tarik." Grafik A dari Gambar 2-8 menunjukkan kurva berdasarkan dorong dibandingkan tarik, yang terutama digunakan untuk pesawat jet. Grafik B dari Gambar 2-8 didasarkan pada kekuatan terhadap tarik, dan digunakan untuk pesawat baling-driven. Bab ini berfokus pada kekuatan terhadap grafik tarik untuk pesawat baling-driven. Memahami kurva hambatan dapat memberikan pemahaman yang berharga tentang berbagai parameter kinerja dan keterbatasan pesawat. Karena daya tarik keharusan sama dengan mempertahankan kecepatan udara yang stabil, kurva dapat berupa kurva tarik atau kurva daya yang diperlukan. Daya yang diperlukan kurva merupakan jumlah daya yang dibutuhkan untuk mengatasi hambatan untuk mempertahankan kecepatan stabil di tingkat penerbangan. Baling-baling yang digunakan pada kebanyakan mesin reciprocating mencapai efisiensi propeller puncak di kisaran 80-88 persen. Seiring dengan peningkatan kecepatan udara, meningkat efisiensi propeller sampai mencapai maksimum. Setiap kecepatan udara di atas titik maksimum ini menyebabkan penurunan efisiensi propeller. Sebuah mesin yang menghasilkan 160 tenaga kuda akan memiliki hanya sekitar 80 persen dari kekuatan diubah menjadi tersedia tenaga kuda,
Gambar 2-9. Daerah Komando. sekitar 128 tenaga kuda. Sisanya hilang energi. Ini adalah alasan kurva dorong dan daya yang tersedia berubah dengan kecepatan.
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