Mini Air Raid Siren (60mm impeller)
thingiverse
This is a 60mm impeller air raid siren. It is extremely loud - measuring an ear-shattering 120 dB on my smartphone app's noise meter. In this video, I throttled the motor back to just 30% because I didn't want to attract unwanted attention from the police. So if you give the motor full throttle, it is significantly louder than what you see in this video. This siren is powered by a high-performance 2204 brushless motor (GARTT ML2204S 2300KV) on a reliable 3S Li-Po battery and a 20amp ESC. It features a versatile 'Siren Base', allowing you to attach this siren to whatever you want. The assembly is straightforward, held together by 3mm screws. Brushless Motor: http://www.aliexpress.com/item/GARTT-ML2204S-2300KV-Brushless-Motor-For-QAV-Quadcopter-Multicopter/32391141894.html?spm=2114.01010208.3.27.bo1F7l&ws_ab_test=searchweb201556_7,searchweb201602_2_10017_10034_10021_507_10022_10020_10009_10008_10018_10019,searchweb201603_6&btsid=251f7274-6331-4b6b-9ec5-f6a627297870
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