TRIAL QUESTION #3
A CLUSTER OF FOUR C6-3 ENGINES PRODUCES HOW MANY TIMES MORE TOTAL IMPULSE THAN A CLUSTER OF TWO B6-6 ENGINES? SELECT THE CORRECT ANSWER ALONG WITH THE PROPER IGNITION WIRING:
1) 8 TIMES, SERIES WIRING
2) 4 TIMES, PARALLEL WIRING
3) 6 TIMES, PARALLEL WIRING
INFORMATION:
- C6-3 and B6-6 are standard model rocket engines.
- The codes stand for: Letter = thrust class, first number = average thrust (in Newton-seconds), second number = delay before parachute ejection (in seconds).
- C6-3: Impulse ~10 Ns, 3-second delay.
- B6-6: Impulse ~5 Ns, 6-second delay.
Context and Solution:
Calculation:
- 4 C6-3 engines: 4 × 10 = 40 Ns
- 2 B6-6 engines: 2 × 5 = 10 Ns
- Ratio: 40 ÷ 10 = 4 times
Ignition Wiring:
To launch multiple engines at once, they are wired in parallel so that all the engines ignite simultaneously.
Correct Answer: 2) 4 TIMES, PARALLEL WIRING