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On a typical aerofoil, a point exists about which the resultant aerodynamic pitching moment M is independent of incidence. This special point is called the Aerodynamic Centre (AC). The numerical value of the pitching moment about AC is denoted MAC. For standard aerofoils in subsonic flows, the Aerodynamic Centre lies approximate ¼ of the chord behind the leading edge (i.e. h=xAC/c ≈ ¼). For supersonic flows, the AC moves abruptly aft to around h ≈ ½; see Fig. 2.2-1. Since MAC is approximately constant over a wide range of CL including zero, MAC is sometimes referred to as the zero-lift pitching moment and denoted M0.
Flow through axial-flow turbo machine rotors can often be assumed axisymmetric i.e. velocity components do not change around the rotor circumference either at inlet or at outlet. N
Aviation legislation - REGISTRATION of AIRCRAFT: All aircraft must be registered in the U.K., before they are permitted to fly. They must also have their allotted registration
2-17 Given a wind speed of 5.0 m/s at 2 m above the ground and a roughness length of 0.8 cm, compute (a) the friction velocity, in centimeters per second, and (b) the wind speed, i
factors affecting engine performance
offer an explanation for why cracking might have occurred. Give at least three suggestion on how to prevent this type of corrosion. You may supple with appropriate figures
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