(Solved): Question 1 - Range of Boeing 777 300ER (15 Points): Boeing 777 300ER is a fuel efficient long range ...

Question 1 - Range of Boeing 777 300ER (15 Points): Boeing 777 300ER is a fuel efficient long range aircraft that is currently being operated by a large number of airline companies. In this question you are asked to run calculations on the range of this aircraft. The following is some useful data: Maximum Takeoff Mass: $351,000\mathrm{kg}$ Maximum Payload Mass: $68,500\mathrm{kg}$ Operating Empty Mass: $169,000\mathrm{kg}$ (Aircraft weight with no fuel and no payload) Design Flight Altitude: $12\mathrm{km}$ Thrust Specific Fuel Consumption (GE-90 Engine): $15510^{?6}\mathrm{N}/\mathrm{N}?\mathrm{s}$ (cruise at design altitude) Wing Area: $436.8{\mathrm{m}}^2$ Wing Span: $64.8\mathrm{m}$ Zero Lift Drag Coefficient $\left(C_{DO}\right):0.013$ Spanwise Efficiency Factor (e): 0.72 Lift Slope: 0.091 1/degrees Zero Lift Angle of Attack: -2.8 derrees a) Estimate the maximum range for Boeing 777 300ER with maximum payload mass. Ignore the segments (takeoff, climb, descent etc...) of the flight other than cruise. b) Assuming maximum range flight with full load of passengers (single class 555 seats), estimate the fuel cost per passenger. Assume that jet fuel cost is $0.65\$/\mathrm{kg}$. c) Calculate the fuel savings (percent) if the operating empty mass is reduced by $5\%$. Max takeoff weight is NOT the same (it is reduced to keep the range at the same level). Maximum payload mass, range, wing design and engine performance are the same. d) A new winglet design is being evaluated. The new design increases the operating empty weight by $1\%$, but also improves the spanwise efficiency factor to 0.75 . Wing area, engine design and maximum takeoff weight does not change. Is this a design change that Boeing should pursue?