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To determine the type of rocket you need, use the following guidelines:• The letter prefix denotes the power of the engine; for example, “B” is twice as powerful as “A” and “C” is twice as powerful as “B”.• The number following the letter indicates the engine’s average thrust in newtons (newton-seconds divided by thrust duration).• The number after the hyphen is the number of seconds between the end of thrust, or the launch, and the start of the ejection charge, which ejects the streamer or parachute or fires the second stage of the rocket.Each includes three engines, three igniters, three igniter plugs, and operating instructions.
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