Like a whistle....HMMMM
Do you have a video w/sound?
Seeing (and hearing) is believing.
I thought the exhaust might 'spit'
against a diaphragm of some sort
with maybe a cone to further
increase the 'soothing' tones.
So, I'll come right out and ask...are
there any diagrams of good chuffers,
or is each a trade secret?
Thanks for the reply,
Wayne