handling on performance boats

[ynnad]

I am new to this, so I apologize if I am asking questions that should be obvious to boaters.
Where is deadrise measured? I have heard that larger deadrise (e.g.24 degrees) is desireable for stability in choppy water. I have also seen specs which show 24 degrees deadrise, but only 14 at the transom.. Seems like when you are on plane, the transom angle is important.

I have heard about chine walk (it is shown in the thread on performance definitions). Do all vee hull performance boats experience this to some degree? Do the counter rotating props on outdrives like Bravo3 help with this?

[ynnad]

I am new to this, so I apologize if I am asking questions that should be obvious to boaters.
Where is deadrise measured? I have heard that larger deadrise (e.g.24 degrees) is desireable for stability in choppy water. I have also seen specs which show 24 degrees deadrise, but only 14 at the transom.. Seems like when you are on plane, the transom angle is important.

I have heard about chine walk (it is shown in the thread on performance definitions). Do all vee hull performance boats experience this to some degree? Do the counter rotating props on outdrives like Bravo3 help with this?

[175checkmate]

The dead rise is measured at the bow. Supposed to help the boat cut throught the waves better. The lesser angle at the stern is there for stability. There can be a lessor angle due to the fact that the water is already displaced.
When chine walk is a factor there can be several things that can make this happen. 1, sloppy steering, 2, play in the motor mounts. Set up.
This is when the the boat is trying to balance on the very point of the "V" Or if the boat has a pad, ballancing on the pad. Chine walk is the side to side motion of the boat "falling off" this surface. Balance of the boat helps as does different props. It takes practice to drive the boat when this is happing. Slight steering inputs to keep the boat on the pad. I have had to learn how to dive my trimate with this. Now that I have added a pad to the bottom I will have to learn to drive the boat all over again.
Welcome to the board. Have fun. And there is no stupid question.

[ynnad]

175Trimate, thanks for the info. I understand that Checkmates handle better than most performance boats, but from your experience even they can get into chine walk. A friend was looking at a Four Winns U-19, but heard that they had very serious chine walk and people were getting out of them because of it.

[175checkmate]

What I have seen on this board and others is this. Checkmate boats set up for the average person rarely have a problem with chine walk. Its when they are overpowered (my boat) and set up to get every ounce of top speed, jackplate and such. This is when they start to have a slight problem with chine walk. This is a problem with every "V" bottom boat when pushed to the edge. Its just some are worse than others.