Rocket Engines go from A-P. As a general rule, each rocket letter is 2x the power of the previous. For example, B is 2x the power of A. It continues until P.
A Level 1 license is required to launch rockets above G with an in-action test. A Level 2 license requires over 18 and a test for certification. A Level 3 license exists and likely more
We use F32 single-use so far with 6s delay.