Yep! The concept works. The basic idea is at least 100 years old.

Some racing speed boats use this.

JP


"Adam Aulick" kirjoitti
...
I have been reading up on seaplanes (Seaplane Operations, by Cesare Baj and
Dale DeRemer) and one frequently repeated fact is that it is very hard to
get a seaplane up on the step on glassy water, because the lack of bubbles
under the float/hull causes the heel of the float/hull to adhere to the
water surface.

This seems like an easily solved problem -- inject bubbles behind the
step. Clearly if it were that easy it would be common practice. What am
I missing?

Here is my hull profile at the step:

To Heel -- Step -- To Bow
_____________________
O| /
x|______________________/


When moving at speed through the water, it seems that at point O there
should be a circulating eddy or turbulence, and at point x there should be
significant suction, yes? So if we attach at point x a hose, whose one
endpoint is at x and the other is above waterline, without any further
mechanics the low pressure at x should be sucking air through the hose and
introducing a trail of bubbles, slipping past the turbulence at O and
running along the undersurface of the heel. If we put in a bunch of such
hoses, or one long hose running along the back of the step with a bunch of
holes spaced along it, we should get a lot of bubbles. Yes?

What am I missing?

~Adam