Building a wooden air raid siren 

The fact that he suddenly looked 10 years younger did not give it away?

@@He4vyD My thoughts: Hm, he looks younger.

I thought the same thing. I remember this vid from about 10 years ago

Same, and I haven't even watched him in years.

This one isn't a revamp, it's the conclusion of the first. He just got out of jail from the first one.

Good for telling children it is meal time . . .

LOL!

Yes, just like my wife was behind me harbor freight 12V cordless carhorn project :P

Ten year old video don’t think he was married then.

@@chriscardwell3495 All children in a 5km radius.

I'm guessing it backfired when the guests at your neighbour's house all piled over to yours where the party sounded a lot more wild?

@@ricos1497 😂

I must try that with my neighbour’s barking dogs..

@@Doorknobz it's an old video, re-edited. Hence why Matthias looks so young...

As MANY as band saws ! A 26" one now !

I know that face is something you make when you know it’s going to be really cool if things don’t go south!

more secure but you will need a bigger motor to run it with the increased weight.

@@brothyr I can see the additional mass reducing the acceleration - but once up to speed the horsepower requirements should be dictated by the airflow and not the weight of the rotor. Right?

And then get's his pantarouter out....

"minimal"????

@@eleSDSU Yes, minimal. He turned the hub with the motor he later used and used his table saw to make it round. He could also have gone for a drill instead of the motor. Many others would have made this either on a lathe or some other way that doesn't result in it being as round. In some other projects he used a motor itself as a lathe, etc. Yes, he has quite an assortment of tools. But he uses them in really clever ways.

Well, you can make pretty much everything. Even swords ! Which are lethal !

Lol you can make everything.

@@jamesbizs make a hypodermic needle!

Why? It's simple math and geometry to calculate how many pulses of air get let through per second to get the pitch desired. For instance, assuming his motor has an RPM of 3600. That makes for 60 revolutions per second. Now he has 6 vanes and 6 ports, so multiply 60 Hz by 6, giving 360 Hz. The second part has 10 vanes and ports, so 60 Hz by 10 = 600 Hz. So his siren has two frequencies, 360 Hz and 600 Hz. What might be interesting is to make the number of vanes and ports relatively prime to each other. That ought to get a much higher pitch, but at the cost of lower volume (air going out of only 1 port at a time instead of all N ports simultaneously).

or you can turn off the --politics-- news :)

@@jamescollier3 Thanks for the advice, but the world is still a bad place. I hear real sirens every day. 😞 (I am from Ukraine)

@@JohnDoe-zs9nj you genuinely have a reason to worry. I don't think the comment was directed at those in your current situation. Anyhow, I wish you the best. Slava Ukraina!

@@JohnDoe-zs9nj the world has never been a better place in all of history. Take his advice and turn off the news.

@@JohnDoe-zs9nj and be like me. I escaped Ukraine in 1991

The sound isn't coming out of the center rather from the holes on the periphery of the stator. So any acoustic horn would essentially be a redesign of the stator.

It's a V8 Chrysler.

I hope you and your family are safe and healthy

Its way less efficient that way.

it requires the full power of the 1 hp motor to run

Agreed. This thing needs horns, and to be mounted vertically.