Whirly Tube Physics

At a Modeling workshop earlier this summer, I was given a “whirly tube”. When you swing it in a circle, it makes a low-pitched whistling sound. There are overtones as well. It’s a pretty interesting instance of the classic standing wave in a tube scenario.

The product is available from Steve Spangler’s store (click the image above).

I wrote up a bit of a physical exposition of what (I think is) is going on with the whirly tube.
Read the PDF

I’m not convinced this explanation is correct. Andy’s suggestion below seems good. I’d appreciate hearing from anyone with insight.


1 thought on “Whirly Tube Physics

  1. Andy "SuperFly" Rundquist

    I’m not convinced that the frequency of oscillation matters. With smaller ones, all you have to do is blow over the top (no spinning needed). I think the corrugation is key.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s