Set No.1
Code No: R05412111
IV B.Tec B.Tech. h. I Semest Semester er Regular Regular Examinati Examinations, ons, Novem November ber -2008 -2008 ROCKETS AND MISSILES (Aeronautical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks
1. Describe Describe in detail, how the quantity quantity of charge charge of an igniter for a solid rocket rocket motor is decided. [16] 2. Descr Describe ibe the two types types of proful profullan lantt feed feed system systemss in in a cryo cryogen genic ic engine engine..
[16] [16]
3. (a) Explain Explain lateral lateral aerodynamic aerodynamic forces forces and and lateral lateral damping damping forces forces on a rocket. rocket. (b) Explain Explain the different different types types of classifyi classifying ng rockets rockets and missiles. missiles. (c) Explain ro cket dispersion.
[6+6+4]
4. (a) Explain Explain the cases cases of vertical vertical flight, flight, constant constant pitch pitch angle angle flight flight and gravity gravity turn turn in the case of a rocket flight. (b) Also explain free space, vacuum, vacuum, and uniform uniform gravity gravity field. field. (c) Derive Derive the expression expression for the burn-out burn-out range (distance (distance covered covered by the time of burn-out) by a single stage rocket in any one of the cases referred to above. [4+2+10] 5. (a) Explain Explain Mass ratio, payl payload oad ratio, propellan propellantt ratio, and structu structural ral efficiency efficiency.. (b) Explain Explain the various methods methods of stagings for a multi-st multi-stage age rocket. rocket. (c) Derive Derive the expression expression for the burn-out velocit velocity y of a multi-s multi-stage tage rocket rocket of ‘n’ stage ages in vertical flight ght in homogen geneous gra gravity field. [6+4 6+4+6] 6. (a) Explain Explain attitu attitude de con contro trol. l. (b) What are the difference in attitude control control of solid rockets and attitude control control of liquid rock ocket? Explain clearly. Use neat sketches. [4+12] 7. (a) Explain Explain all the forces forces and moment momentss acting acting on the two two separa separatin tingg stages stages in a multi-stage rocket. Draw neat sketches showing details. (b) Explain the differences in the two two separations of a multi-stage rocket rocket - tandem stage and parallel stage. [8+8] 8. (a) Describe the criteria for selecting materials for fabricating rockets rockets and missiles. (b) List out the differen differentt materials materials used to fabricate fabricate the parts of a rock ro cket et identiidentifying the materials used for each part. (c) (c) Do you use use composite compositess for rockets rockets?? If so what are the the parts? parts? What What is the advantage? [6+6+4]
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Set No.2
Code No: R05412111
IV B.Tec B.Tech. h. I Semest Semester er Regular Regular Examinati Examinations, ons, Novem November ber -2008 -2008 ROCKETS AND MISSILES (Aeronautical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks
1. Explain, in detail, the factors to be considered in the design of an igniter for solid motors of a ro cket. [16] 2. Descr Describe ibe the the two two types types of propel propellan lantt feed feed system systemss in liquid liquid rocke rockett engine engines. s.
[16] [16]
3. (a) Explain Explain the the lift lift and drag drag forces forces actin actingg on a rocket rocket.. (b) Explain Explain the components components of drag coefficien coefficient. t. (c) Does Oswald’s efficiency factor play a mojor role in the drag of a rocket? Explain. (d) Write a short note on ro cket disp ersion.
[4 ×4]
4. (a) Derive Derive the equation equation for the burn-out burn-out velocit velocity y of a rocket rocket in free space. space. (b) Derive the expression for the burn-out range in the case of constant specific thrust. [8+8] 5. (a) Explain: Explain: Mass ratio, ratio, Payload Payload ratio, ratio, propellant propellant ratio, ratio, and structu structural ral efficiency efficiency.. (b) Derive the expression expression for the maximum ideal burn-out velocity of a multi-stage rocket of ‘n’ stages in free space. (c) Hence, Derive an expression for the maximum ideal burn-out velocity velocity of a two two stage ro cket of identical structural efficiencies. [6+8+2] 6. (a) Write short short notes notes on Attit Attitude ude control control of a rocket. rocket. (b) Is thrust thrust vect vector or contro controll easy easy in a solid solid rocket rocket or in a liquid liquid rocket rocket ? Why? Why? Explain in detail. [4+12] 7. (a) Draw Draw sket sketch ches es expla explaini ining ng the axes system system used used in descri describin bingg the dynamic dynamicss of separati separation. on. Mark Mark all the forces forces acting acting on the two two stages stages.. Expla Explain in all the symbols used. (b) Describe the various systems used in stage separation.
[8+8]
8. (a) What What are the parts parts of a rocke rockett which which are exposed exposed to high tempera temperatur tures? es? (b) What is the source of heating for these parts? Explain Explain clearly clearly. Draw sketc sketches hes if necessary. (c) What are the metallic metallic materials materials used in rockets rockets and missiles? missiles? and why? why? [4+6+6]
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Set No.3
Code No: R05412111
IV B.Tec B.Tech. h. I Semest Semester er Regular Regular Examinati Examinations, ons, Novem November ber -2008 -2008 ROCKETS AND MISSILES (Aeronautical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks
1. (a) Explain Explain the the types types of ignitio ignition n system system used used in solid motor motors. s. (b) Describe the burning pro cess in a solid prop ellant. 2. Descr Describe ibe the various arious sub-sy sub-syste stems ms in in a liqu liquid id rocke rocket. t. Draw neat neat sketc sketches hes..
[16] [16]
3. Explain, Explain, using neat sketc sketches: hes: (a) Body up-wash (b) Down-wash Down-wash (c) Lateral Lateral aerodynamic forces forces and moments moments (d) Longitudinal stability of a ro cket.
[4×4]
4. (a) Derive Derive the Tsiolko Tsiolkovsky vsky’s ’s equation for the the velocity velocity of a rocket. rocket. (b) Derive Derive the expression expression for the burn-out range (Range at burn-out) burn-out) in the case of constant thrust. [8+8] 5. Derive Derive the expressi expression on for the culmination culmination altitude altitude of a two stage rocket. rocket. Explain Explain all the assumptions very clearly. [16] 6. Explain Explain the various various methods of thrust thrust vector vector control in a rocket. rocket. Explain Explain clearly what is thrust vector control. [16] 7. (a) Explain Explain the dynamics dynamics involv involved ed in stage separation separation in a multi-s multi-stage tage rocket. rocket. (b) Explai Explain n the separ separati ation on syst system em used used in in separ separati ation on of parall parallel el stag stages. es.
[8+8] [8+8]
8. (a) What What is Thermal Thermal protec protectio tion n in a rocke rockett or a missil missile? e? Explai Explain n clearly clearly.. Why Why and where it is requited? (b) What is ablation? (c) What is cryogenic cryogenic material? material? (d) What are the struc structur tural al materi materials als used used to make make rocke rockets ts with with oxyge oxygen n and hydrogen as fuels? [4×4]
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Set No.4
Code No: R05412111
IV B.Tec B.Tech. h. I Semest Semester er Regular Regular Examinati Examinations, ons, Novem November ber -2008 -2008 ROCKETS AND MISSILES (Aeronautical Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks
1. (a) In the cont conten entt of a solid solid motor motor of a rocket, rocket, what what is burn rate rate?? (b) What What are the the facto factors rs influe influenci ncing ng the burn burn rate rate of a solid solid prope propella llant nt?? 2. Describe the different types pes of injectors in a liquid rock ocket.
[8+8] [8+8] [16]
3. (a) Explain Explain the forces forces acting acting on a missile missile while while passing passing through the the atmosphere atmosphere.. (b) Write on ro cket disp ersions.
[8+8]
4. (a) Derive Derive the expres expression sion for the velocit velocity y of a rocket rocket in free free space. space. (b) Derive a similar expression for a rocket in vertical flight in a homogeneous gravitational field. [8+8] 5. (a) Explain Explain homo homogen geneou eouss gravit gravity y field. field. (b) Derive the expression for the culmination altitude of a two stage rocket in vertical flight in a homogeneous gravity field, in vacuum. (c) (c) What is the the effec effectt of assu assumi ming ng that that the the fligh flightt is in vacuu acuum? m?
[2+1 [2+12+2 2+2]]
6. (a) What is is thrust thrust magnitude magnitude cont control? rol? Explain clearl clearly y. (b) Explain the methods of controlling the thrust magnitude in solid and liquid ro ckets. [16] 7. (a) Write the equati equations ons which which describe describe the dynamics dynamics of separation separation of stages in a multi-stage rocket. (b) Explai Explain n the various arious separ separati ation on system systemss emplo employe yed d in stage stage separat separation ion of a multi-stage ro cket. [8+8] 8. (a) Explain Explain what is is meant meant by thermal thermal prote protection ction syste system m (TPS). (TPS). (b) What are the parts of rockets rockets where TPS are used? Explain Explain in detail, using good sketches. (c) (c) What What are the the differe different nt type typess of TPS used used in rocket rocketss and missil missiles? es?
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[4+6+6] [4+6+6]
