JNTU
JNTU B.Tech III CONCEPTUAL DESIGN OF FLIGHT VEHICLES Previous Question Paper (May - 2019 - R15)
Part A is compulsory. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
What is meant by request for proposal?
Answer
A Request for Proposal (RFP) is a formal document issued by a customer or government agency that outlines the specific requirements, performance goals, and operational constraints for a new aircraft design, inviting manufacturers to submit competitive design proposals.
Mention the difference between mission profiles of transport aircraft to military aircraft with neat sketches.
Answer
A transport aircraft mission profile typically follows a steady-state path: take-off, climb, cruise, descent, and landing, focusing on fuel efficiency and range. In contrast, a military aircraft mission profile is highly dynamic, involving combat maneuvers, high-speed dashes, low-altitude flight, and weapon delivery, requiring high thrust-to-weight ratios and structural robustness.
What is the difference between fixed and rubber engine sizing?
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What is Sears-Haack volume distribution?
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Where are the boundary layer diverters used?
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Explain the types of shock absorbers.
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Define categories of aircraft loads.
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What is the significance of v-n diagram?
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What is Cooper – Harper scale?
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What are the effects of wind on aircraft performance?
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Part B
Explain briefly about different phases of aircraft design process.
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Write a short note on the parameters considered for designing of wing.
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Explain about fuel fraction weight estimation of military aircraft.
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Discuss briefly about various tail arrangements.
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What is meant by lofting and explain its importance with various methods.
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Explain about the design configuration of crew station and passenger compartment.
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Explain about the sizing matrix and carpet plots with required sketches.
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How to calculate capture area for engine and what are the factors considered for inlet geometry and location with provision for engine cooling.
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Explain in detail about Landing gear arrangement and gear retraction geometry.
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Discuss briefly about various methods of structural analysis and effect on material selection.
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Explain in detail about estimation of lift curve slope, high lift devices and drag polar with neat sketches.
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Explain in detail about Oswald span efficiency method and leading edge suction method.
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Explain longitudinal static stability and control with required equations and figures.
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Define rate of climb (jet engine) Rate of climb (prop engine), time to climb, level turning flight, gliding flight with necessary equations.
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