model rocket, we usually consider all rockets based on the internations safety code according to NFPA 1122 using engines in the A-G range (up to 160 Ns).
This means using lightweight, breakable components and no basic metal parts. Examples are kits from Estes or Quest.
Additonal, we differ between Low- and Midpower model rockets. Lowpower is considered between A-D, while Midpower is within the E-G range.
AeroTech.