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Aircraft Design Practice Test: Conceptual Sketch Sizing
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Conceptual Sketch Sizing topics include: Takeoff-weight buildup and construction, empty weight and fuel-fraction estimation. The conceptual sketch is used to estimate aerodynamics and weight fractions by comparing to previous designs.  The initial sizing of an aircraft defines its rough size and weight based upon its intended requirements. The total take-off gross weight is the sum of all the possible aspects of an aircraft. It will depend on fuel weight, crew and payload weight, and also on empty weight.    The conceptual design process consists of four stages: Pre conceptual design... Show more
Aircraft Design Practice Test: Conceptual Sketch Sizing
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25 Questions

1. A jet transport aircraft has fuel storage of 1200kg. It has completed taxi phase and preparing for take-off. At the end of the taxing, it has fuel fraction of 0.98. Determine how much fuel is available after taxing. Given take-off gross weight is 9000kg.
2. A military Aircraft should be designed to have ______
3. Is it mandatory for Aircraft to carry reserved fuel?
4. Which of the following is part of take-off weight estimation?
5. Total fuel weight of aircraft is ______
6. An aircraft with crew and payload of 180kg is flying. If fuel weight fraction is 0.353 and empty weight fraction 0.481 then, what will be the gross weight of aircraft?
7. Estimation of take-off weight is an iterative method.
8. Aircraft fuel weight does not include reserved fuel fraction.
9. A general aviation aircraft is flying with crew load of 115lb, payload of 220lb and fuel weight of 100lb. Find out the design take-off gross weight of the aircraft, given 95lb empty weight.
10. Which of the following is correct?
11. Determine the corrections or otherwise of the following assertion [A] and reason [R]:
Assertion [A]: Fuel consumption is more for low level, high speed flight mission.
Reason[R]: At low altitude, the aerodynamic efficiency decreases drastically which affects the engine efficiency and range as well. To maintain cruise flight more fuel consumption is required.
12. Cessna 172R has total gross weight of the 1110.98kg with fuel capacity of 210 kg and weight of crew and passenger is 125kg. Find out empty weight fraction.
13. Take-off gross weight of an aircraft is summation of _____
14. Keeping all other factors constant if only range of aircraft is increased then, what will be effect on the gross weight of aircraft?
15. In A/C, we provide reserve fuel for _____
16. A Jet transport aircraft is flying with crew load of 175kg, payload of 1400kg and fuel weight of 500kg. Find out Fuel to empty weight fraction, if design take-off gross weight of the aircraft is 5600lb.
17. The empty weight fraction of a jet transport with fixed sweep is given by ______
18. What is the first step to estimate the gross weight W0?
19. What is the working principle of ‘fuel-fraction’ method?
20. Which of the following pair is correct based on the empty weight fraction?
21. According to FAA, general aviation aircraft requires reserved fuel in terms of _____
22. Fuel consumption during cruise is affected by wetted area.
23. A jet airliner aircraft is flying with crew load of 150kg, payload of 520lb and fuel weight of 500lb. Find out the empty weight if design take-off gross weight of the aircraft is given 1525lb.
24. How will you determine climb mission weight fraction?
25. What will be the total fuel weight fraction for x-number of mission phases?

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