Erotic Air Raid Siren - Download Free 3D model by Virgil (@Virgil) [4eec] - Sketchfab Images
Philipp Mlekusch MlePh of Austria has created a fully functional 3D printed air raid siren that is cranked by hand.
There's a newer version of this design:Air Raid Siren - hand crank version 2 This design is % 3D printed. Works fine but may have friction trouble when rotating fast. Be careful when using it. Dont touch the moving parts while they are rotating!.
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