- 3.1 Compliance
- A model rocket must comply with all specifications in this section and the Model
Rocketry Safety Code before, during, and after flight.
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- 3.2 Gross Launching Mass
- The gross launching mass of a model rocket, including model rocket motor or motors,
shall in no event exceed 1,500 grams. See also Rule 9.11.
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- 3.3 Propellant
- No more than a total of 125 grams of solid propellant materials shall be contained
in its model rocket motor(s) at the moment of launch.
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- 3.4 Stages
- There shall be no more than three consecutively fired stages. The staged configuration
of the model is considered to be that of the model at the instant of first motion on the launcher.
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- 3.5 Reusability
- A model rocket shall be so constructed as to be capable of more than a single flight;
and shall be provided with a means for retarding its descent to the ground so that its
structure may not be substantially damaged, and so that no hazard is created to persons
and property. If a model descends in more than one unattached part, each part must conform
to the above specification.
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- 3.6 Materials
- Construction of the airframe shall be of wood, paper, rubber, plastic, or other similar
materials consistent with the Safety Code.
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- 3.7 Stability
- Design and construction shall include suitable means for providing stabilizing and
restoring forces necessary to maintain a substantially true and predictable flight path.
If required by safety officers or judges, the builder of the model must present data
demonstrating that their model meets this requirement.
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- 3.8 On-Board Ignition Systems
- A model rocket possessing a self-contained powered ignition system (e.g., for remote
ignition of upper stages) must be provided with a safety switch or other device capable of
preventing actuation of the system and resultant ignition until immediately prior to the
launch.
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- 3.9 Dethermalizer
- A model rocket equipped with a dethermalizer or other auxiliary device designed to
operate via ignition or combustion must be designed so that ignition of the device presents
no imminent hazard to the person igniting the device. In addition, the rocket must be
designed so that the device is extinguished as soon as possible after performing its
function (e.g., by the inclusion of a snuffer tube).
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