Comparison of Concepts: Classic Jet Propulsion, Turbo-Electric Propulsion and Turbo-Hydraulic Propulsion

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Comparison of Concepts: Classic Jet Propulsion, Turbo-Electric Propulsion and Turbo-Hydraulic Propulsion ( comparison-concepts-classic-jet-propulsion-turbo-electric-pr )

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Table 4.2 A320 data for landing distance (Nita 2013) 37 Parameter Landing field length 𝑆𝐿𝐹𝐿 Approach factor π‘˜π΄π‘ƒπ‘ƒ Factor π‘˜πΏ Relative Density 𝜎 Max. lift coefficient landing 𝐢𝐿,π‘šπ‘Žπ‘₯,𝐿 Mass ratio, landing-take-off π‘šπ‘€πΏ π‘šπ‘€π‘‡π‘‚ Value 1480 π‘š 1.818 π‘š/𝑠 0.122 π‘˜π‘”/π‘š 1 3.14 0.88 The approach speed can be related to the landing field distance using statistics. The main val- ue obtained from this section is the wing loading at maximum take-off mass ( ). This can be achieved using (4.1), (4.2) and (4.3) and the values given in Table 4.2. All the values given in the Table 4.2, were calculated for A320. 4.2.2 π‘˜ 𝑉 , πœ‚ , π‘Ž Take-off Distance π‘Ž= 𝑆 𝑃, =π‘Žβˆ™π‘š π‘šπ‘† π‘˜ βˆ™1.2βˆ™π‘‰, βˆ™π‘” βˆ™ 𝜎 βˆ™ 𝐢 , , βˆ™ πœ‚ , βˆ™ √2 (4.4) (4.5) factor stall speed, take-off configuration propeller efficiency during take-off slope The input data for this block are the take-off field length (𝑆 cient in take-off configuration (𝐢 , , ). By inputting these data, one can obtain the power to weight ratio as a function of wing loading. This can be calculated using (4.4), (4.5) and the result from (4.3). ) and the maximum lift coeffi-

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