Rotary subwoofer!

[MarkWComer]

I wondered if such a thing was possible, now I see people building them. A helicopter works by the variable pitch of the blades, a fan pushes air- why not combine the two to make a subwoofer? Interesting project!

 

[J!m]

I bet you could get actual Sikorsky sky crane rotors at surplus.

Go big or go home!

 

[mr_rye89]

A building I manage has two really big fans with variable pitch blades, Suppose those could be modulated......No telling what will happen at those SPLs.....

 

[MarkWComer]

A building I manage has two really big fans with variable pitch blades, Suppose those could be modulated......No telling what will happen at those SPLs.....

Could possibly induce bowel movements in everyone in the building…

 

[Bob Boyer]

Wonder how close this is to the Leslie speakers for Hammond B3s?

 

[Bob Boyer]

I learned everything I need to know about a Hammond/Leslie combo from Robyn Robins at a Bob Seger/Silver Bullet Band show in 1975 at Memorial Auditorium. They hit town not long after the release of Beautiful Loser. Those organ notes shoved my chest in and all I wanted was MORE!!

I'd be curious to know how well this design works.

 

[MarkWComer]

Wonder how close this is to the Leslie speakers for Hammond B3s?

Not the same concept. A Leslie used rotating baffles to create tremolo, the rotating sub modulates pumped air from a fan. I can see the connection, but the purposes are completely different.

 

[Bob Boyer]

Thanks. I figured it wasn't close but had to wonder...

 

[MarkWComer]

Although this is a great curiosity to me, it looks like it’s prone to mechanical failure. Despite cabinet resonances and wave cancellation at certain frequencies, I think the best way to go is with the standard configuration with a huge cone facing the floor.

 

[laatsch55]

Or a bass bin stuffed in a corner..

 

[AngrySailor]

I bet I could mate a big block Chevy to one...

 

[Bob Boyer]

You do have the big block Chevy.

 

[J!m]

And an Lenco…