LS2022 23 Call4

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First name Last name Personal ID number Score Launch Systems (8 credits) July 14th , 2023 First part - Closed book Each question is worth 1 point. The student must obtain at least 6 points otherwise the second part of the exam will not be corrected. WRITE THE ANSWERS IN THIS SHEET Preamble Bonus eligibility Flipped class (If yes, write team name) PEER evaluation Mark the proper box …………………………….. Project participation Do you want to use the project evaluation and skip the second part of the exam? (If yes, write team name) Mark the proper box ……………………………………………………. Launch Systems Page 1 NO YES YES NO NO YES Routes and trajectory Answer to the following questions. 1. (Skip for MULTICHANCE) Consider a missile lifted off from ground and its past trajectory at a given instant of time, described with 3DOF inside a round earth 2D frame of reference. Draw it and identify in the diagram the following properties: Angle of attack Flight path angle Local horizon Downrange 2. Write the relation between angle of attack, pitch and flight path angle in a flat earth model. Define the symbols not yet disclosed. 3. What is the launch Azimuth? Draw it or describe it by words. 4. Consider a direct route to the final orbit. What are the constraints on this orbit imposed by the launch site? Launch Systems Page 2 General knowledge 5. Do you agree with the following statements? Mark them as true (T) or false (F) (correct answer +0,2, wrong answer -0,1, no answer 0 – Negative result rounds to 0) Use of green propulsion is typically a programmatic requirement VEGA is not a potential baseline for the new Ariane VI launcher Vertical launch missions are characterized by low Mach trajectories A cruise missile is typically endoatmospheric The Pegasus XL is an air-to-orbit launch system 6. Consider a…