2021 2022 June

Page 1

First name Last name Personal ID number Mark Launch Systems June 20th, 2022 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 Scenario – Air-to-air missile This is the Derby air-to-air missile with a range of about 50 km. It is 3,6 meter long and weight 118 kg. Front wings are movable. 1. You need to improve the performance of the missile. Mark them as true (T) or false (F) (correct anser +2, wrong answer -1, no answer 0) If I want to increment the powered range at constant speed I can reduce the size of the wings If I want to increment the powered range at constant speed I can make it fly at a slower flight speed If I want to make it stabler, I can make the front wings larger If I want to make it more agile, I can move the front wings backwards. If I want to make it stabler I can make the rear wings larger. Launch Systems Page 1 2. What kind of guidance system are you considering for this kind of missile? (two valid questions. The selection of a wrong answer invalidates the question.) Gyroscopes Terrain recognition Radar homing GPS Star tracker Infrared seeker 3. What happens to performance if a boattailing is introduced? 4. Let’s consider the turning performance of the missile. Write the equation quantifying the angular speed ˙γ and disclose the nomenclature. 5. How can I minimize the turning radius? (three valid questions. The selection of a wrong answer invalidates the question.) Increment the drag Increment the lift Reduce the weight Operate at lower altitude Have higher flight velocity Reduce the yaw inertia moment Launch Systems Page 2 Scenario – Space launcher technology 6. Consider the following picture. Which of the…