Re-cap - mission & aircraft data:

• Design range 3285 nm
• Maximum payload 36629 kg
• Average L/D during cruise = 18.1 (NB Not best L/D!)
• sfc = 0.50 lb/h/lbf
• cruise Mach = 0.79 at 35,000 ft
• OWE = -1530 + 0.47 * MTOW   (weights in kg)

Q: What is the ESAR in m?

NOTE: DO NOT MOVE ON TO THE NEXT PAGE WITHOUT ANSWERING THIS FIRST QUESTION!

Estimate the maximum take-off mass in kg for an aircraft with:

Design range 3285 nm

Maximum payload 36629 kg

Average L/D during cruise = 18.1 (NB Not best L/D!)

sfc = 0.50 lb/h/lbf

cruise Mach = 0.79 at 35,000 ft

OWE = -1530 + 0.47 * MTOW   (weights in kg)

What is the cruise speed in m/s, to 1 d.p.?

What is the s.f.c. in kg/s/N, to 4 s.f.?

Re-cap - mission & aircraft data:

• Design range 4368 nm
• Maximum payload 53840 kg
• Average L/D during cruise = 18.1 (NB Not best L/D!)
• sfc = 0.58 lb/h/lbf
• cruise Mach = 0.82 at 35,000 ft
• OWE = 2384 + 0.46 * MTOW   (weights in kg)

Q: What is the ESAR in m?

NOTE: DO NOT MOVE ON TO THE NEXT PAGE WITHOUT ANSWERING THIS FIRST QUESTION!

Estimate the maximum take-off mass in kg for an aircraft with:

Design range 4368 nm

Maximum payload 53840 kg

Average L/D during cruise = 18.1 (NB Not best L/D!)

sfc = 0.58 lb/h/lbf

cruise Mach = 0.82 at 35,000 ft

OWE = 2384 + 0.46 * MTOW   (weights in kg)

Q7 Now set the RRC to zero and re-calculate the required Tsls/MTOW (to 3 d.p.) at a design wing loading of 6,000 Pa.

Q5 What is the dynamic pressure (at Mach 0.88, 38,000 ft), to the nearest Pascal?

Recap:

Consider an aircraft with the following aerodynamic & mission specification: 

• CD0 = 0.0172; k = 1.18; AR = 9.7
• Cruise Mach = 0.88 at 38,000 ft
• Throttle setting 78%

• Cruise weight = 0.94 % MTOW
• Residual rate of climb allowance = 2.2 m/s

Q4 What is the cruise thrust factor (T/Tsls) at 38,000 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 6,000 Pa