Turbine air raid siren vacuum cleaner powered
thingiverse
the siren is powered by a vacuum cleaner the sound is verry loud, i used silicone grease for lubrication, the bold is m4. you dont need any support to print it. maybe the hole where it spins around in you have to put a drill piece 4 mm thru ( i drawn in 4,4 ) . check dat it spins free after you put the parts together. also have a look at my other things for more interesting things printed in PLA https://youtu.be/_SdwOh6j1hw
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