Thank you very much for your help. If we end up building something I will show you the result here.

That is very helpful, thank you. Do you have some advice about the amount and exact shape of the vanes? 2800RPM+ means 3000RPM would be good or is more more better? I guess then I we would need a belt drive since most motors are either 1500 or 3000RPM with a 50Hz grid. The siren would be mounted hor...

Thank you for the clarification, that is indeed good to know. But at least outside it should be easy to hear even with wind. I think corrosion won't be an issue for us. Paraguay is great in that regard, almost no rust on cars. First of all no ice and therefore no salt on the roads and I have the fee...

There isn't a real budget yet because we all don't know anything about the topic. It should be as inexpensive as possible while doing it's job and being reliable. My time is free if I am going to build something, so it would just be materials in this case.

Hi everyone, I live in a gated community settlement project in Paraguay and we want to implement a warning system with sirens. The settlement area is around 4km² / 1000 acres. In Paraguay we cant find any large sirens and importing is very expensive and/or takes a long time. So I got the idea to bui...