hey BLAKESTAH, impotant question

JLW

Billy Hamilton status
Jul 7, 2004
1,665
62
48
About a month ago, you gave me basic dimensions for a single fin good for 4-6 foot very hollow and powerful waves.

Basic a board made for small-to-medium-size wave tuberiding.

Here's what you said:

Going hollow on a single means keeping the tail narrow. 14.5 inches is too wide for a 3-5 ft barrel seeker. Try 13.25 inches.

WRT rocker, front rocker under 4.5 inches is not desireable, or you will pearl too many late drops. Try 4.75 inches, and complement that with 2.25 inches rear rocker.

WP Centered to 2 inches forward.
Max width 19.25 inches
Tail 13.25 inches - nose 11-12 inches
Rounded pin tail.
Rails thinned and down in the rear third, but not hard. Wider rails through the mid-point. Rails raised and thinned near the nose.
Bottom countour: 3/16" vee in front of the fin, fading forward and rearward. Carve out the sides about 1/8" inch in a mini-hydro hull double concave through the tail.
My fin system.

Best small wave tube riding single ever.

If you use a rigid single instead of my system, flatten front and rear rocker by 1/4 inch, and move the wide point to 3-4 inches forward. But you will probably find a thruster works better than a rigid single.
Now, for the rocker. For nose rocker, you said at least 4.5 inches of nose rocker. Is this at the very tip of the nose, or 12 inches down from the nose?

And for the tail rocker, you said 2-2.25 inches of tail rocker. Did you mean 2.25 inches at the very end of the tail, or 2.25 inches of tail rocker 12 inches from the tail?
 

joeblaga

Gerry Lopez status
Jan 11, 2002
1,100
0
0
northern california
even though i'm not blakestah i think i can answer that. nose and tail rocker measure the total rocker of each respective region of the board. you'll want to measure from the tip of the nose and tail, not 12 inches in.
 

000

Duke status
Feb 20, 2003
26,216
7,565
113
thrusters r much better than singles, ask the top 44
 

blakestah

Phil Edwards status
Sep 10, 2002
6,139
0
0
Fixed singles are really great! Thrusters don't work 'better' than fixed singles! Your recording got stuck again. Although those measurements are all good, there are so many variations on the single fin theme which can be ridden in hollow waves that it is really silly to say that such and such a measurement is too big or small. Really wide tailed singles can be fun in hollow waves. Your measurements also don't take the size of the rider into account. This 'Best' measurement stuff is all BS.
First, if you had seen the original post to which I replied, you would have seen JLW's weight (which is actually kinda close to my weight). It is out of context without that, but that is not my fault.

Second, there are people that ride wide-tailed fixed singlefin boards in hollow waves, but only a few shapers making the boards well, and I wouldn't recommend it to a backyard shaper.

Third, working "better" is subjective. Thrusters do generate speed off the bottom turn better than singles, and do hold a bottom turn better, and do allow higher performance (ie: shorter radius turns) with a wider tail (and thus a shorter effective hull length). If you say a fixed single can generate speed, then you have NEVER generated speed on a thruster, plain and simple. It is an enormous difference.

Fourth, I think, based on the previous time JLW asked for dimensions, he is interested in what a fixed single can do. It's really a little tiresome when you query me about the same points in a second thread that you already queried me about before.

Fifth, we had overhead hollow waves last week, and I got slotted like I never have before on a fixed single or a thruster - riding my rotating single. <img src="/forum/images/graemlins/grin.gif" alt="" />
 

JLW

Billy Hamilton status
Jul 7, 2004
1,665
62
48
Some people prefer the feeling of trimming on a single fin, rather then pumping on a thruster. Simple as that.

Some like the glide, some like the turning.

In terms of performance, and generating your own speed, is the thruster better? Hell yeah it is. Is it smoother? No way.