Length over width for volume?

Can't find the right forum, then post your general surf-related remarks here!

Moderators: Shari, collnarra, Butts, beach_defender, Forum Moderators

Post Reply
Kulharin
Grommet
Posts: 36
Joined: Thu Aug 11, 2016 8:02 am

Length over width for volume?

Post by Kulharin » Sat Sep 10, 2016 7:20 am

I am wondering why shorter fatter boards seem a lot more common than longer narrower boards.

I figure length help more with paddling and early wave entry than width and that a narrower board allows for better rail to rail.

For instance 7' x 20 vs 6'10 x 21.

Also what is the advantage of going for less thickness such as 2 3/4" over 3"... just volume for duck diving?

Beanpole
Huey's Right Hand
Posts: 26796
Joined: Mon Apr 25, 2005 8:21 am
Location: Counting fins

Re: Length over width for volume?

Post by Beanpole » Sat Sep 10, 2016 9:24 am

Or 6'x 221/2"x 3".

Kulharin
Grommet
Posts: 36
Joined: Thu Aug 11, 2016 8:02 am

Re: Length over width for volume?

Post by Kulharin » Tue Sep 27, 2016 3:45 am

I've just noticed that short, wide boards are very common, but longer narrow boards are not. Would not a longer/narrower board be bigger for faster, steeper waves compared to a shorter/wider board?

User avatar
offshore1
Snowy McAllister
Posts: 7964
Joined: Fri Aug 26, 2005 12:40 am

Re: Length over width for volume?

Post by offshore1 » Tue Sep 27, 2016 3:47 am

Yes
ajohnsen wrote: My tertiary education has been a bit like a blind woman with sudden onset diarrhea in a bathroom accessories showroom.

Kulharin
Grommet
Posts: 36
Joined: Thu Aug 11, 2016 8:02 am

Re: Length over width for volume?

Post by Kulharin » Tue Sep 27, 2016 4:37 am

I am having an 6'8 x 2 3/4 funshape, rounded tail, quad fin shaped. The default width is 21.5; I am debating going 21, 20.75 or 20.5... As I don't want to lose the intended feel and performance of the shape, but I'd like to reduce a bit of volume and make it better suited for steeper faster waves.

Gumby
regular
Posts: 131
Joined: Mon Jun 23, 2014 8:26 pm

Re: Length over width for volume?

Post by Gumby » Tue Sep 27, 2016 5:50 am

Generally the default width is the default width for a reason, and is what contributes to its "intended feel". If you're already familiar with that model/design and those dimensions then you could make a confident call to make slight modifications, but otherwise I wouldn't go lopping off an inch of width for the hell of it.

...my 2 cents

Kulharin
Grommet
Posts: 36
Joined: Thu Aug 11, 2016 8:02 am

Re: Length over width for volume?

Post by Kulharin » Tue Sep 27, 2016 6:59 am

Ok thanks, though a 1/4 inch 1/2 inch of width likely wouldn't have too much of an impact?

Gumby
regular
Posts: 131
Joined: Mon Jun 23, 2014 8:26 pm

Re: Length over width for volume?

Post by Gumby » Tue Sep 27, 2016 10:20 am

1/4 inch is definitely less noticeable than a whole inch of course. Depends on how much there is to begin with, but every board is different.
I recently got a new board (6'0). Went 1/4 inch narrower than my previous board, and found it quite noticeable in terms of stability. It's what I wanted because it turns better, but definitely makes a difference. Granted there are other slight factors as well given its a different brand/model too, but it's what I noticed the most. Maybe what you're going for is not the right board for faster steeper waves, if it is defined as a "fun shape". In my opinion (and I'm no elite shredder or board shaper), I'd still go for that one if that's what you think you'll ride most of the time. If you're comfortable on it, then you'll probably have more chance of handling it when the waves do get that bit more steep/fast. Every board has its upper and lower limits though.

2 more cents (spending some serious coin here)

buddy
barnacle
Posts: 1000
Joined: Thu Mar 10, 2016 6:34 pm

Re: Length over width for volume?

Post by buddy » Tue Sep 27, 2016 10:44 am

Gumby wrote:1/4 inch is definitely less noticeable than a whole inch of course. Depends on how much there is to begin with

Chicks are digging the short, wide and thick movement.
I've been told.

User avatar
The Mighty Sunbird
Snowy McAllister
Posts: 8893
Joined: Thu May 03, 2007 12:43 pm
Location: Pogo's

Re: Length over width for volume?

Post by The Mighty Sunbird » Tue Sep 27, 2016 3:37 pm

Also wouldn't a board 4 inches longer be harder to handle in small surf than if you went 2 inches wider?
Erase.

Kulharin
Grommet
Posts: 36
Joined: Thu Aug 11, 2016 8:02 am

Re: Length over width for volume?

Post by Kulharin » Wed Sep 28, 2016 1:19 am

Well I do have a 6'6" x 20 x 2 3/4 proper short board shape; I can surf it well enough... Problem is I now live about 10 hours from the waves in a mountain town... good for skiing and mountain biking, less for surfing. I do get a bunch of time off and take extended surf trips throughout the spring, summer and fall... my ability to pop up and surf doesn't seem to suffer, it's my paddling endurance that really takes a hit. Hence looking at a fun shape... I also have a 7'8 x 21 3/4 x 2 3/4 with a more aggressive rocker and pointed nose.

User avatar
surfresearch
Grommet
Posts: 94
Joined: Sun Dec 30, 2007 8:56 am
Location: 150°45' E 34°52' S

Re: Length over width for volume?

Post by surfresearch » Thu Jun 08, 2017 11:30 am

Re: I figure length help more with paddling and early wave entry than width
1. Paddling
Paddling performance is largely a function of volume, and weight.

Without basic illustrations ... consider a surfboard board of a given shape and thickness, 6 ft x 20''.
If you add 1'' in length (6ft 1'' x 20''), you are adding a block of foam across the middle of the board 1'' x approximately 20''.
If you add 1'' in width (6ft x 21''), you are adding a block of foam down the middle of the board 1'' x approximately 60''.
(reduced from 72'' to allow for the foiling in the cross-section)
60 /20 = 3
In this case, when compared to an increase in the board's length, an inch added to the width is about three times the volume.

2. Early wave entry - Planning (?)
For hydrodynamic planning hulls, where the bottom operates at the boundary between two mediums, one of which is approximately 800 times as dense as the other, early planning is largely a function of the width, or the leading edge, or the aspect ratio (Lord, 1946).
For a given surfer and wave, a wider board of the same shape and length will get on the plane earlier at take-off.
Or, a wider board will require less wave power or wave speed to get on the plane.
And/or, it will get on the plane on a less steep wave face.
Generally, wide boards for fat and weak waves, narrower boards for steep and powerful waves.

However, note that once the board transverses the wave face (wave-sliding), the dynamics become far more complicated (perhaps mystical).

Historically, the minimum width for riding while standing was probably about 15''.
In the modern era, Midget Farrelly went down to 17'' in 1972, but since then minimum widths are generally + 18''.
In the 21st century, tow-in boards are often -18''.

The maximum surfboard width is about 24'' (slightly wider than the rider's shoulders), above this the mechanics of paddling become increasingly less efficient, and it is more difficult to carry.
Surfboards went as wide as 24'' in late 1967, a development by Midget (again), McTavish and others, and some current Malibu designs approach 23''.
Surf-skis and stand-up-paddle boards, by virtue of their mechanical advantage, are sometimes +24''.

Thank you,
Geoff Cater

Elmako
Grommet
Posts: 84
Joined: Sun Aug 12, 2007 12:04 pm

Re: Length over width for volume?

Post by Elmako » Fri Jun 30, 2017 10:18 am

Many things at play here. Things like where do you surf: Sunset Beach or Manly

Yes shorter wider boards are more common in Sydney beaches as most of the time it grovelling however the narrower longer boards are more common in waves that demand control on speed and power.

The thickness question you ask could also be addressed on how much control you want, besides the obvious reduction in volume your board will bite the water a bit more resulting in a board that feels more knifing the surface of the wave as opposed to sitting on top of the water.

Narrower boards can be less forgiving for the learning surfer too...

J

User avatar
Davros
Snowy McAllister
Posts: 8582
Joined: Fri Feb 02, 2007 3:46 pm

Re: Length over width for volume?

Post by Davros » Fri Jul 07, 2017 9:17 am

Get a Hypto Kryto

JET01
charger
Posts: 920
Joined: Tue Oct 16, 2007 4:04 pm

Re: Length over width for volume?

Post by JET01 » Thu Jul 27, 2017 11:08 pm

:lol:
Davros wrote:
Fri Jul 07, 2017 9:17 am
Get a Hypto Kryto
:lol:
Live in the sunshine, swim the sea, drink the wild air.

Post Reply

Who is online

Users browsing this forum: 138cfh, Bing [Bot] and 25 guests