Ignition System

The NAR Safety Code states: "Ignition System - The system I use to launch my model rocket will be remotely controlled and electrically operated. It will contain a launching switch that will return to "off" when released. The system will contain a removable safety interlock in series with the launch switch. All persons will remain at least 15 feet from the model rocket when I am igniting model rocket motors totalling 30 Newton-seconds or less of total impulse and at least 20 feet from the model rocket when I am igniting model rocket motors totaling more than 30 Newton-seconds of total impulse. I will use only electrical igniters recommended by the motor manufacturer that will ignite model rocket motors within one second of actuation of the launching switch."

Ignition System Schematic: The following is a schematic for an ignition system similar to the type that comes with starter kits. The advantage of building a custom launcher is the ability to use more power, thus igniting the engine more quickly.

About the Schematic:The batteries must put out enough power to start an ignitor. At least six AA batteries are needed. One nine volt battery will not work.

A Safety Interlock: must be included in every launch system. For home-built launch systems, a phono plug and jack work very well. Use the jack in series, and simply connect each of the wires together on the plug.

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Nicholas Burlett, Nathaniel Grady and William