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Tham khảo tài liệu 'thiết kế kỹ thuật máy bay chiến đấu episode 1 part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | LIST OF SYMBOLS XXV Symbol Meaning Symbol Meaning IFu u ndercarriage landing gear weight H . Wing group weight Wp Weight of Control surface eg elevator but see Table 2-7 for other suffixes Wa d Wa dt rate at which a given weight of air Wa is flowing w Maximum width of fuselage nose ahead of wing ac w Linear velocity along O-Z axis downwash velocity H Semi thickness of wake w Wing loading w Velocity along O-Z axis eg gust War Downwash at aerodynamic centre of wing iv Specific weight of piston or turbo-prop engine X Force in direction O-X Xi Aileron drag X Distance measured horizontally or along the O-X axis X Unknown quantity Xn Momentarmof component n aboutCG Xs Distance from hinge pivot to ac of stabilator X . 2. Distances from O-X axis X Moment arm of centre of gravity about O-Z or O -Z axis X Moment arm of lift about CG Y Force in direction O-Y Y Height of equivalent plane of biplane above bottom plane Yp Yr Yv Yi. Y Side force derivatives y Distance of element of mass measured normal to the plane of symmetry y Distance of stressed element from neutral axis of a section y Height of tailplane above fin-fuselage junction at the fin 4 chord see also Z yn Lateral moment arm of component n offset from CG yp yr yv yi yỉ Sideforce coefficient derivatives ýỉ Moment arm of aileron centroid about CG Y Moment arm of centre of gravity about O-X axis ZLL Zero lift line Z Force in direction O-Z z Roll damping force z Height of tailplane above or below fuselage-fin junction see also y Zo Moment arm of drag about CG Zf Moment arm of thrust about CG Zp Zr Zv Zi Zf Force derivatives in direction O-Z z Distance measured in direction O-Z - z Length of semi-minor axis of ellipse ZD Moment arm of drag about CG ZF Moment of thrust about CG Zn Moment arm of component n above or below CG Zp Zr. Zv. ztZf Normal force coefficient derivatives z Vertical inoment arm of centre of gravity about O-X or O -X axis a Geometric angle of attack of wing a Propeller blade angle of attack Orff .
