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EG2100 Engineering Design II - Aerospace (PRD1 A 2025/26)
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Q6 What is the climb gradient for the given residual rate of climb and cruise speed, quoted in % and to 3 d.p.?
Q5 What is the dynamic pressure (at Mach 0.78, 34,000 ft), to the nearest Pascal?
Q7 Now set the RRC to zero and re-calculate the required Tsls/MTOW (to 3 d.p.) at a design wing loading of 10,000 Pa.
Recap:
Consider an aircraft with the following aerodynamic & mission specification:
- CD0 = 0.0173; k = 1.22; AR = 9.3
- Cruise Mach = 0.78 at 34,000 ft
- Throttle setting 75%
- Cruise weight = 0.96 % MTOW
- Residual rate of climb allowance = 2.0 m/s
Q4 What is the cruise thrust factor (T/Tsls) at 34,000 ft, to 3 d.p.?
Q3 Calculate the required Tsls/MTOW (to 3 d.p.) to satisfy this Cruise requirement at a design wing loading (MTOW/Sref) of 10,000 Pa
Q2 What is the speed of the aircraft at these conditions, in m/s, to 1 d.p.?
NOTE: DO NOT MOVE ON TO THE NEXT PAGE WITHOUT ATTEMPTING THESE THREE QUESTIONS!
Consider an aircraft with the following aerodynamic & mission specification:
CD0 = 0.0173; k = 1.22; AR = 9.3
Cruise Mach = 0.78 at 34,000 ftThrottle setting 75%
Cruise weight = 0.96 % MTOW
Residual rate of climb allowance = 2.0 m/s
Answer the following three questions in turn:
Q1 What is the density of the atmosphere at the cruise altitude, in kg/m3 , to 4 d.p.?