JNTU
JNTU B.Tech IV Year FLIGHT VEHICLE DESIGN Previous Question Paper (December - 2019 - R16)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b as sub questions.
PART - A
Define the specific fuel consumption for high-bypass turbofan.
Answer
Specific Fuel Consumption (SFC) for a high-bypass turbofan is defined as the fuel flow rate per unit of net thrust produced. It represents the efficiency of the engine in converting fuel energy into thrust and is expressed as
Explain the empty weight estimation formula.
Answer
The empty weight estimation formula is typically expressed as
What is geometric twist?
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Describe tail arrangement configurations for tandem wing.
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Define nozzle integration for fixed convergent.
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Draw the diagram for seaplane geometry.
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Define fuselage and nacelle pitching moment.
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Define balanced field length, level turn, steady roll, inertia coupling.
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Mention the Power plants as well as the Jet intakes used in Lockheed SR-71, Northrop Grumman B2, and F-16.
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Write in brief about the landing gear peculiarities in Boeing’s B-47 aircraft?
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PART - B
Discuss the different aspects for preliminary design and detail design and various steps involved in both the stages of design.
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Draw the sketches of various tail configurations that have been used to help the aircraft to recover from spin and explain how they are good for the job?
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Explain in detail about productibility considerations and maintainability considerations.
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Explain passenger compartment for a commercial aircraft with neat sketches.
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Describe the various types of landing gear. If you are designing a high subsonic airliner, which type of landing gear would you go for? Justify your answer.
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Write the advantages and disadvantages of bicycle type and tail wheel type of Undercarriage and explain them with neat sketches.
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Write the equations for Range endurance for jet engine and propulsion engine.
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Solve the problem for antisubmarine turbo jet aircraft is designed for loiter of three hours at distance of 3,000 km from the base. The crew weighs 400 kg and payload weigh 4600 kg. The aircraft cruises at Mach 0.6 at an altitude of 10 km, where the speed of sound can be taken to be 300 m/s. The maximum value of (L/D) is 16. Calculate the omission fuel weight fraction of the aircraft if the specific fuel consumption is 0.015 g/N/s.
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Explain the design procedure of Boeing B-47 and 707.
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Mention the different variants of F-16 introduced till date.
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What does SR stands for in Lockheed SR-71 Black Bird?
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