1. For a commercial jetliner calculate the following assuming the aircraft had t
ID: 1859513 • Letter: 1
Question
1. For a commercial jetliner calculate the following assuming the aircraft had the liberty to
change altitude depending only on performance
A
a. The weight of an aircraft that is at 37,000 ft and 0.8 Mach when available thrust is equal to
the required thrust.
b. The range of the aircraft if it cruises from that point onwards at 37,000 ft.
c. The %u201Cearliest%u201D time when the aircraft could go from 37,000 ft to 39,000 ft. (Meaning, how
much time would it take for the aircraft to have burnt enough fuel to reach a weight where
the aircraft can sustain flight at the new altitude). Hint: use formula in part a. for weight at
new altitude.
d. The range of the aircraft if it were to cruise at 37,000 ft until the %u201Cearliest time%u201D it can go to
39,000 ft and then cruise at 39,000 ft thereafter.
e. The %u201Cearliest%u201D time when the aircraft could go from 39,000 ft to 41,000 ft.
f. The range of the aircraft if it were to cruise at 37,000 ft until the %u201Cearliest time%u201D it can go to
39,000 ft, then cruise at 39,000 ft until the %u201Cearliest time%u201D it can go to 41,000 ft, and then
cruise at 41,000 ft, thereafter.
Explanation / Answer
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