L2 HPR Technical Quiz

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#1. What is the purpose of a launch rod, rail or tower?

#2. Which of the motors listed below has the highest total impulse?

#3. The flight of a high power rocket can be separated into three portions; they are:

#4. Most APCP (ammonium perchlorate composite propellant) rocket motors are central-burning rather than endburning:

#5. The average thrust of a rocket motor is 100 Newtons and the burn time is 4 seconds. What is the total impulse?

#6. Rocket A weighs twice as much as rocket B. Both are descending at 20 feet per second. Which statement is true?

#7. What is the most common function of a motor liner and the O-ring seals in a solid rocket motor?

#8. What is a Newton?

#9. Which of the following has a total impulse (I t ) in the J motor range?

#10. What does the motor designation I220-8 mean?

#11. What are the three forces acting upon a rocket during flight?

#12. The center of pressure (CP) of a rocket is generally defined as:

#13. What is NH 4 ClO 4 ?

#14. For an inherently stable rocket, which statement about the center of gravity (CG) and the center of pressure (CP) is true?

#15. What happens to the coefficient of drag (C d ) as the rocket approaches the speed of sound?

#16. The definition of coefficient of drag (C d ) is:

#17. What is the oxidizer most commonly used in a commercial hybrid rocket motor?

#18. When using an accelerometer-based altimeter in a rocket that may exceed Mach 1:

#19. How do you convert Newtons of thrust to pounds of thrust?

#20. What is the most common oxidizer in commercially available high power composite solid rocket motors?

#21. For a cluster rocket, which construction technique will minimize the effect of one motor failing to ignite?

#22. When using a pressure-sensor altimeter in a rocket that will not reach Mach 1:

#23. How can a statically unstable rocket be made stable?

#24. You are at the launch site and decide to fly your rocket on a heavier motor than you simulated it on. Which statement regarding CG is true?

#25. Rocket A is descending at 10 feet per second, rocket B weighs the same but is descending at 20 feet per second. Which statement is true?