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EG2100 Engineering Design II - Aerospace (PRD1 A 2025/26)
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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?
Q7 Now set the RRC to zero and re-calculate the required Tsls/MTOW (to 3 d.p.) at a design wing loading of 5,000 Pa.
Recap:
Consider an aircraft with the following aerodynamic & mission specification:
- CD0 = 0.0174; k = 1.20; AR = 7.4
- Cruise Mach = 0.86 at 34,000 ft
- Throttle setting 75%
- Cruise weight = 0.95 % MTOW
- Residual rate of climb allowance = 0.8 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 5,000 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 = 0.0174; k = 1.20; AR = 7.4
Cruise Mach = 0.86 at 34,000 ftThrottle setting 75%
Cruise weight = 0.95 % MTOW
Residual rate of climb allowance = 0.8 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.?