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EG2100 Engineering Design II - Aerospace (PRD1 A 2025/26)
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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 = 0.0178; k = 1.21; AR = 8.3
Hold speed = 275 kts at 2000 ft
Rate of turn = 2.6 deg/sThrottle setting 50%
Hold weight = 0.76 MTOW
Answer the following three questions in turn:
Q1 What is the density of the atmosphere at the hold altitude, in kg/m3 , to 4 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 9,000 Pa
NOTE: DO NOT MOVE ON TO THE NEXT PAGE WITHOUT ATTEMPTING THESE THREE QUESTIONS!
Consider an aircraft with the following aerodynamic & mission specification:
CD0 = 0.0172; k = 1.23; AR = 7.6
Cruise Mach = 0.84 at 34,000 ftThrottle setting 77%
Cruise weight = 0.97 % MTOW
Residual rate of climb allowance = 2.1 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.?
Q7 Now set the RRC to zero and re-calculate the required Tsls/MTOW (to 3 d.p.) at a design wing loading of 7,000 Pa.
Q5 What is the dynamic pressure (at Mach 0.80, 34,000 ft), to the nearest Pascal?
Recap:
Consider an aircraft with the following aerodynamic & mission specification:
- CD0 = 0.0179; k = 1.17; AR = 8.8
- Cruise Mach = 0.80 at 34,000 ft
- Throttle setting 78%
- Cruise weight = 0.95 % MTOW
- Residual rate of climb allowance = 1.9 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 7,000 Pa
NOTE: DO NOT MOVE ON TO THE NEXT PAGE WITHOUT ATTEMPTING THESE THREE QUESTIONS!
Consider an aircraft with the following aerodynamic & mission specification:
CD0 = 0.0179; k = 1.17; AR = 8.8
Cruise Mach = 0.80 at 34,000 ftThrottle setting 78%
Cruise weight = 0.95 % MTOW
Residual rate of climb allowance = 1.9 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.?
Q5 What is the dynamic pressure (at Mach 0.86, 34,000 ft), to the nearest Pascal?