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5.5 Partial Parallel Hybrid Clean-Sheet Design Aircraft main data Unit Reference Aircraft 97 Hybrid Aircraft 𝛥 Ref. 77730 28% 76170 29% 0.538 -9% 0.236 -22% 0.075 -28% 0.150 NA 0.290 -12% 645 0% 120.4 28% 12.5 0% 39.1 13% 26.4 0% 15.6 -14% 6.8 NA 13.50 2% 2220 NA 19.0 5% 2080 13% 143 +0% MTOW [kg] MLW [kg] OEW/MTOW Design payload/MTOW Release fuel/MTOW Total battery/MTOW 60840 59010 [-] 0.594 [-] 0.302 [-] 0.104 [-] NA [-] 0.320 𝑇 /𝑀 𝑇 𝑂𝑊 S.L,static 𝑀𝑇𝑂𝑊/𝑆𝑟𝑒𝑓 [kg/m2] 𝑆𝑟𝑒𝑓 (Airbus gross) Wing aspect ratio (Airbus gross) Wing Span Wing Leading Edge Sweep Geared Turbofan Design Thrust (ISA, FL350, M0.78) Electric fan Design Thrust (ISA, FL350, M0.78) TSFC (ISA, FL350, M0.78) Electric Motor Maximal Power L/D (initial cruise, ISA, FL350, M0.78, MTOW breakes release) TOFL (ISA, SL) Approach speed (ISA, SL, MLW) 645 [m2] 94.3 [-] 12.5 [m] 34.6 [°] 26.4 [kN] 18.1 [kN] NA [g/kN/s] 13.29 [kW] NA [-] 18.1 [m] 1850 [kts] 143 Table 5.8: Main aircraft data of the reference and hybrid-electric aircraft sized at a design range of 1300 nm and a 𝐻𝑃𝑢𝑠𝑒 of 30% [31] 5.5.2.6.2 Aircraft Mass Breakdown As shown in Table 5.9, the sizing effects have produced an outcome where the structural weight of the hybrid-electric aircraft is increased by 17% compared to the advanced conventional aircraft. Focusing on the propulsion system, the 14% down-size in design thrust of the geared turbofan leads to a decrease of 14% in the combustion-based power plant weight. However, due to the installation of the electric fans, which includes the weight of the ducted fans and of the electric motors, the combined propulsion system weight is increased by 24%. The installation of the PMAD with 1348 kg results in a 37% increase in electrical system weight. Consequently, the OEW of the hybrid- electric aircraft is 16% higher. The release fuel (including block and reserves/contingency) is reduced by 8%. The block fuel reduction was found to be around 15%. The total battery mass installed is 11740 kg.PDF Image | Conceptual Design Methods Hybrid-Electric Transport Aircraft
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