Design evolution - part 1

What works and what doesn't. Share design ideas, references and contacts for paipo board builders.

Design evolution - part 1

Unread postby bgreen » Thu Mar 23, 2017 6:59 am

In 2011 I got the first of 5 boards based on the designs of Larry Goddard.

Board number 2 is: 4' 5 3/4" x 21 3/8" x 1 7/8". This board is the fastest board I've ridden. From the moment of take-off it takes off. It can be ridden finless and handles a steep wave, though isn't great as a tube-rider. If there is some turbulence or a section collapses, that's the end of it. Flat bottom .

MM2_profile.jpg

MM2b.jpg


MM2_deck.jpg


The next board was thinner & narrower. It was a bit too much hard work for me and I sold it to a friend who likes low volume boards.

Board 4 was a compromise board, more volume, not as fast but I've had some nice tubes on it. Same dimensions but the rails weren't as hard in the tail. It also has a handle. It is a good all round board. I mostly have ridden this board finned. Fins allow night tight arcs.

MM4_profile_w600.jpg

MM4_tail.jpg
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Last edited by bgreen on Thu Mar 23, 2017 7:23 am, edited 1 time in total.
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Re: Design evolution - part 2

Unread postby bgreen » Thu Mar 23, 2017 7:10 am

Another view of board # 4
MM4_bottom.jpg
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Board # 5 is narrower - 4' 5 3/4" 21 " 1 7/8" , and notably has a rocker based on a surfboard, rather than Larry's bellyboard rocker. The other notable features are the deck dish and wings. This board, because of reduced volume, duckdives well but makes for later take-offs. The notable feature of this board is that it is a great tuber rider. However, faced with turbulence or whitewater it lacks stability or rather the ability to plough through. A lot of fun ridden finless. Boards 5 & 5 also have a narrower tail than earlier boards.

MM5-profile-bottom-S.jpg
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MM5_deckup.jpg
MM5_deckup.jpg (79.76 KiB) Viewed 1621 times

MM5Bottom-S.jpg
Last edited by bgreen on Thu Mar 23, 2017 3:40 pm, edited 2 times in total.
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Re: Design evolution - part 3

Unread postby bgreen » Thu Mar 23, 2017 7:22 am

The deck dish of board #5

MM5Deck2-S.jpg


Board # 6, was meant to be slightly thicker, but the shaper decided to add some drive, after I showed photos/footage of the board caught in whitewater as well as deep in a tube. The dimensions are the same as bard # 5,

MM6-Tail2.jpg
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MM6-foil2b.jpg
MM6-foil2b.jpg (77.88 KiB) Viewed 1621 times

MM6-bottom1.jpg


This board can get a noticeable burst of acceleration in a hollow section. This also ahs a surfboard style rocker. I've ridden it finless and finned - I want to experiment with fins a bit more (I've tried bonzer fins, a small keel and a small straight fin. All under 4"0. I haven't really fully tested this design.

I was going to not get another board for a while, but am somewhat tempted to try a hybrid of boards 5 and 6. Keep 5's wings and dish, but go a bit thicker, for stability.
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Re: Design evolution - part 1

Unread postby CHRISPI » Thu Mar 23, 2017 2:11 pm

That looks very nice , all it needs is to finish all the release points or were the water leaves the board with a taper
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Re: Design evolution - part 1

Unread postby bgreen » Thu Mar 23, 2017 3:42 pm

Chrispi,

Do you want to expand on what you mean by finishing with a taper?

Bob
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Re: Design evolution - part 1

Unread postby 1handclapping » Thu Mar 23, 2017 5:19 pm

Hi Bob good info.
I am just about to start a new board similar to the last but with 6" more length.
I will need to join the blank which should not pose a problem using epoxy.
I will keep the bottom flat with very little nose rocker soft rails leading into hard for the last 1/3 of the board.
My last board had very little volume which mad if hard to paddle into fat waves so I am hoping the extra length will help with this.
I will use a twin setup as I have used a set of keels,and happy with the performance.
We have been getting good waves although the water is a bit murky good banks have been formed on back beach.
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Re: Design evolution - part 1

Unread postby bgreen » Fri Mar 24, 2017 6:13 am

Hello Lewis,

Good to hear from you.

From memory you could go a bit longer (.75 of your height is one rule of thumb though I'm sure there are plenty of exceptions).

If you are around at Easter and there are northerlies I'd be very tempted to head down your way. I have a low rocker board you could try if you like. I posted photos of it on the mini-Simmons thread.

Are you still riding the bellybogger?

Bob
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Re: Design evolution - part 1

Unread postby 1handclapping » Fri Mar 24, 2017 10:55 am

Bellybogger,I loved that board unfortunately I snapped the tail.
I cut it down and rode it a few times it never performed like the full length board.
Some of the best sessions at the point was had on that board.
I am enjoying playing around with making my own.
Be great to catchup we don't get many paipo surfers round here.
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Re: Design evolution - part 1

Unread postby CHRISPI » Fri Mar 24, 2017 1:04 pm

Hi Bob
I seam s as if most people on this forum know how fins or foils work and how they must taper to work properly. But don’t put that same science in to the main lifting body? And no disrespect meant it just seems so clear in my head?!? I think we should open a post on design philosophy and how we make these decisions when shaping boards
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Re: Design evolution - part 1

Unread postby bgreen » Sun Mar 26, 2017 7:41 am

Hello Chrispi,

I'd be interested to see a photo or drawing of what you mean by tapered properly.

Hello Lewis,

I'll see what I can do. I try to avoid the real busy days. I'll be in spot X from Thursday to Thursday.

Bob
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