WHAT IS CHINE RIDING?

[penpal]

Can someone explain what this is?

 

[Whitelighter]

Chine riding or walking is where a boat on the plane starts to plane on its side. This is due to the chines along the hull diggin in to the water and preventin the boat coming back upright. It doesnt usually last for long, but it can be very diconcerting and will start to tunr the boat if left. It usually happens when crossing wake of in a beam sea.

 

[cawarra]

The large sports Sealine's (S41,S42,S43) were very prone to this and I totally agree with Westline, its very disconcerting when you are new to it! It certainly fine tunes your trimming skills!!!

 

[jfm]

Yup, planing on its side. If it rides on the port side chine, the hull behaves as if its port chine is its port chine and the keel is its starboard chine, and planes along the port side (only) of the hull bottom, with the starboard side kinda hanging there doing nothing. And with the boat slanted over, port side down starboard side up. Turning or slowing down normally cures it. My old phantom 42 did it occasionally, when crossing a big wake at very acute angle eg when overtaking someone

 

[nonitoo]

A following sea can cause great excitement and a lot of helm juggling.

Tom

 

[davedpc]

My old phantom 18ft with a 200hp o/b used to chine ride at speeds over 50mph. You was not able to know which chine it was to ride on after a wave or wake. Useing the bow water ballast tank used to help as this increased the keel to water length. When one side 'bit in' it would have the effect of slowing the boat on that side and slewing it off in that direction.Pretty hairey stuff if i remember. Just like m/bike riders convert into better car drivers i think racing dingy or sport boat drivers help to become better cruiser helmsmen.

 

[Kipper]

You bought a lake boat or one with a hull not really designed for seas is what my tame spanner munket tells me.

No idea if thats right but Im sure there are some real experts to hand

 

[hector]

Just for the record,i've had a S43 on shafts for 5 years, and it does not chine ride,belive it's down 2 extra weight of engines and shaft driven.

 

[Vagabond]

think they sorted it out by the time they got the to 42/3's

A friend of mine had the 41 and he said that it would be going along fine and then just fall over onto a chine.

I woud guess that there must be some beam to weight ratio problem.

 

[Dave_Snelson]

The chine (or hard chine) is the line along the length of the boat where the hull meets the sides and forms a hard defined corner. Boats without a chine are displacement boats that won't plane. Chine riding is where the hull either "flops" to one side and rides along the chine or worse bounces from one chine to another, flip-flopping from side to side as it planes through the water.

I once went on a boat that did this. Some chap had fitted a 110HP 6cyl Merc to a fletcher with a design rating of 50HP. It was fast - very fast, but equally scary when it started bouncing from side to side, to eventually flip right over and tip its crew out. That flip-right-over manouever is called a dutch roll. Funny to watch but not at all funny to partake in.

 

[Major Catastrophe]

I found this picture on Scuttlebutt of a yot chine riding. /forums/images/graemlins/grin.gif

 

[nonitoo]

That's either aground or being sailed in the most inefficient way possible...................

Tom

 

[[2068]]

Sorted in later boats - the D6 engines are just that bit heavier...

dv.

 

[No Regrets]

[ QUOTE ]
That's either aground or being sailed in the most inefficient way possible...................

Tom

[/ QUOTE ]

No sir!

He's empyting his heads /forums/images/graemlins/tongue.gif