and just what is...

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Well-Known Member
Sep 20, 2003
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a "safety interlock" as described by the NAR code with respect to ignition systems?

Is this a mechanical device or an electrical switch (or both)?

Comments from "officials" welcome and thanks.
Usually what they refer to as an "interlock" is a safety key which, I believe, cannot be removed with the launcher in the "armed" position.

Not just an on/off switch.

Like the safety pin (key) in the Estes Electron Beam launcher.

The safety interlock is supposed to require positive pressure to arm the launcher. This is why the Estes launchers have the rubber gasket on the key, to push it back out and break the circuit if there's no active pressure put on them holding them in. It's there to keep someone from accidentally bumping the launch button while you're at the pad hooking up your igniters.