NFPA 1122-2018 Code for Model Rocketry

NFPA 1122-2018 Code for Model Rocketry. 4.1* Model Rocket Operations. A model rocket shall comply with the requirements of construction and operation as set forth in 14 CFR 101.1–101.29, “Federal Aviation Administration Regulations.” 4.2 Model Rocket Materials. 4.2.1 A model rocket’s structural parts, including the body, nose cone, and fns, shall be made of paper, wood, or plastic and shall contain no metal parts. 4.2.2 A model rocket motor casing that is metallic, reloadable, and meets the specifcations in this code shall be permitted. 4.3* Model Rocket Recovery. 4.3.1 A model rocket shall have a means for returning it to the ground (for example, a parachute) so that it can be fown again. 4.3.2 All recovery wadding used in a model rocket shall be fame-resistant. 4.4* Model Rocket Weight Limits. 4.4.1 A model rocket shall weigh no more than 1500 g (53 oz) at lift-off, including rocket propellant. 4.4.2 A model rocket shall use no more than 125 g (4.4 oz) of rocket propellant. 4.5 Model Rocket Power Limits. A model rocket’s installed motor(s) shall produce a total impulse of no more than 320 N- sec (71.9 lb-sec). 4.6 Model Rocket Payloads. A model rocket shall not carry a payload that is designed to be fammable, explosive, or harmful to persons or property. 4.7 Model Rocket Flight Paths. A model rocket shall not be launched on a fight path aimed at a target. 4.8 Model Rocket Launch Site. A model rocket shall be launched outdoors in a cleared area, free of tall trees, power lines, buildings, and dry brush and grass. 4.9 Model Rocket Launch Site Size. The launch site shall be at least as large as specifed in Table 4.9. 4.9.1 For a circular area, the minimum launch site dimension shall be the diameter; for a rectangular area, it shall be the shortest side. 4.9.2 Type G motors with an installed total impulse of more than 80 N-sec (18 lb-sec), but not more than 160 N-sec (36 lb- sec), shall be permitted to be used by individuals 18 years of age and older. 4.9.3 As an alternative to the minimum launch site dimen‐ sions of Table 4.9, the size of the launch site shall be permitted to meet one of the following criteria: (1) It shall be not less than one-half the maximum altitude as stated by the manufacturer or as calculated by fight simu‐ lation for the model...