HELP NEED PT2 [Helped]

This is a bit more than you may need but this is the basic concept.

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THis is for the sound, i need someone to show me how to attach an angular speed meter to a wood cylinder in the encine in order to increase the sound pitch when the engine get more RPM.

Anticipate thanks!


Thanks to dOUBLEbAD for showing me how to attach gas control.