[almost ] bogging nose rails .....

General Discussion
1

on my 9’ mal in small hollow waves .

seems to happen more on my backhand , but yesterday on a coupla head high ones , it almost happened on my forehand

anyone else have this problem ??

it is mainly up to waist high waves when i take off sideways that i notice it happening .

i’m hoping to get it video’d sooner or later , so i can SEE more clearly what is happening .

i’m thinking the back box fin [a 1984 version of the currently available ‘red tip’ fcs type template] wight be lifting the tail a bit , causing the nose to catch …any thoughts on that ??

[it’s being used in conjunction with two hemp inlay mr tx type sideys ]

cheers

ben

2

What’s your foil (distribution of thickness) like throughout the board. Nice and flowing?

3

not too bad

thinner in the nose and tail than in the middle

50/50 type nose rails

hard tail rails from about 18" up from the tail [to the tail tip , obviously]

…how about you ??

how do YOU go with sideways takeoffs on a mal in small sucky waves , dean ? any similar edge- almost -catching experiences ?

cheers mate

benyou

4

Since switching to a quad I find it’s possible to hold a much finer angle on take off. Had some smaller suckier ones and some mushy stuff as well. I think a large centre fin can get “pulled” by water moving up the face especially on sharper take offs. Especially with a centre fin not favouring either rail. Other than that a thick nose is all I can think of but sounds like this isn’t the case.

5

Ben, are you bogging in the front? off the side of the nose or slightly down the rail?

Is the board spearing into the water and catching/rolling or sitting low and going nowhere ?

I ask because I wonder if its the rocker that might be too flat for the hollow waves youre on,

or the rails could be too thin or thick near the front,

or maybe its the launching technique?

Can you see where its bogging before you ‘dive for the lobster’ ?

Id post a pic for clarity but the ‘upload pic’ button doesnt show for me.

Regards, Brett.

"Look Smithers! Garbo is coming ! "

6

Aloha Ben

Time to do some home work!

Can you describe this bogging a bit more. I am not sure what you are experiencing. Is the forward rail seeming to sort of grab and kick the tail out. Or does it just kind of wallow slowing down until you change things and then it releases and seems to break out of its bogging?

Is this a board issue or a fin issue? Meaning, is the board tracking due to fins sort of locking up or fighting one another. Or is it a board issue, where one part of the board seems to be fighting with another part of the board under certain circumstances? Please add your expanded thoughts and feelings.

Also have you tried the board with different fins? Any difference in the problem?

Can you post some pictures of the board? Especially rocker profiles. And fins and set up.

Can you provide some measurements of the Rocker, widths, and thickness at the nose tip and 12" back, Center and the tail tip and 12" up"

Also need fin position measurements, with cants and toe ins. Describe Toe Ins as the distance off the nose tip on either side as opposed to degrees at the fins.

Do the homework, collect the data and the answer will emerge. If it isn’t readily obvious in the data collected I will try to help find it.

BB

7

What’s the stringer-to-rail contour like under the nose? It sounds to me like a nose rail issue, particularly if it’s a wide nose with flat or belly underneath. Narrow noses with belly work (like on guns) but wider noses on longboards can get catchy as soon as you get up some speed, especially with thin rails… and not just just in the nose. Thin rails along the sides get the whole board deeper on takeoff, pulling the nose into the wave more easily.

But here’s where it gets complicated… I believe that flat/bellied noses on longboards work OK in smaller waves, but as they get bigger/faster they tend to catch and bog. But… when you get out of that “window” of size, and get into bigger surf, the board rides higher all around, and planes on a different part of the bottom due to rocker, putting the nose up higher and out of the bog zone. Variations in rocker, of course, change all of this.

This is just my experience…so I’m just throwing them into the discussion.

8

You say that it happens occasionaly.

And when you drop in sideways on small hollow waves

more on your backhand side

My first guess is your sideways entry may not have enough forward speed and your mal just dont have it in her to accelerate to the speed of the wave

then you mentioned it happenend in head hi waves

I my self would start with a new fin set up, maybe a single flex fin to start

9

I agree with the above guys, It seems that its all about keeping the nose rail out of the water and there are several ways of doing that by,

adding rocker (either along the whole board or just a localised nose flip),

adding roll or belly to effectively lift the sides ( rails) up

and/ or pulling in the nose outline (planshape).

And there seems to be a limit to how far all of these options can be implemented without detracting from the whole design.

Chips, maybe you are taking off on your backhand a little bit further forward for stability and thats aiming your board a bit ‘nose down’ ?

Ben, what do you thinks going on?

Brett.