I'm looking for a mechanical switch that responds to centrifugal force by closing a NO contact. I need to switch 20mA in a space of about 5mm in diameter and 8mm long. It also needs to be self-contained (no assemblies of several other parts) since it's going to spin pretty quickly and be in a small space.
This is for somewhat ridiculous flashing LEDs at the end of a RC helicopter's balance bar.
Anyone have any keywords or parts in mind?
(A microswitch with a small mass pressing on the switch that actuates when I spin up might be doable if there's no other way.)