Okay, I totally stole that punchline from here
But, it also means able to be certified. Those rocketeers that are over 18 can get their NAR (National Association of Rocketry) Level 1 certification. This involves buying 1 H or I motor (161-640 Ns / 36-144 Pound-seconds of total thrust), sucessfully flying a rocket with said motor with several certified witnesses, and sending the paperwork in. Then, you can freely buy and use H and I motors all you want. Cool.
However, you couldn't do that if you were a minor like me. Recently, however, the NAR rolled out the Junior L1 Certification program. It's almost the same as the regular program, but with a few differences:
- An adult must purchase the motor for you
- You must use a motor with an ejection charge rather than electronics-controlled blackpowder for recovery.
- The supervising adult must be present when you insert the motor into the rocket
- You can't go for level 2 certification (J, K, and L motors) until you turn 18.
I'm planning on going for mine soon. CATO, the rocket club to which I belong, has plenty of members willing to supervise me.