flow of water pass transom question

[Ad Hoc]

Originally Posted by cyclops2

Problem is, the ones with no wake crests along side the hull. They look harmless. They are the ones that create MASSIVE SUNAMI waves when the more powerfull underwater pressure wave hits a ledge 10 feet down. 1/2 to 1 mile away. Almost sank my 19' bowrider. Head on.

It is all about the energy of the wave system they produce, not a single amplitude wave,per se.

Those boats that PAR mentioned are all low Length Displacement ratio...terrible. Very high residuary resistance....as noted by their wash.

[Yobarnacle]

No wave crests along the hull? Answer is obvious. There are 3 types of resistance. The greatest is wave making created along the hull moving through water. The faster she goes, the further apart the crestlets get stretched. Eventually at some speed, there is one crest at the bow and another at the stern. This is hull speed and longer the waterline the higher velocity when reaches hull speed. To exceed hull speed means driving the vessel up hill over its own bow wave. Surfing on the face of its own bow wave is called planing. The vessels you see with no crests alongside are at maximum speed, hull speed. Any additional power they are applying gets dumped into a wake forming turbulent pressure wave astern. You are observing bad handling and ignorance on part of whoever is conning vessel. Notifying their company will get them educated. They are also wasting fuel ie: money. Companies disapprove of wasting money.

[PAR]

What models did I mention?

[Ad Hoc]

Originally Posted by PAR

What models did I mention?

These:-

Originally Posted by PAR

.... Since slip fees are based on length, every effort is made to pack 10 pounds of boob in a 5 pound bra.

[PAR]

Yes, the queens . . . I have to admit I've slept in a few, though they got me drunk first.