The figure below illustrates the approximate efficiency of VTOL aircraft in hover. 1) Find, by curve fitting, the equation of (MTOW/Installed HP) = f (Disc_Loading) of the curve below and draw it on the same axes. Show the equation. 2) Applying the momentum theory, estimate the efficiency for: 1) Agusta A109, 2) Black Hawk, 3) V 22, 4) EH 101 and 5) AV 8. Assume a diameter of 0.8 m for each of the four gimbaling jets in the AV 8 3) Write a short comment about the above results in reference to the five aircraft The solution should include a figure with: 1) The curve from equation 1 and 2) The data found above for the five aircraft showed by different markers on the same diagram MTOW/Installed power HP Hover lift efficiency, gross weight/horsepower (lb/hp) 50 10 Helicopter Tilt rotor Tilt wing Lift-fan 100 Disc loading, gross weight /thrust area (b/2) Direct lift 500 5000 L 50000 Kg/m^2 1000 10,000