I've made a couple and I've used belly up front which creates a bit of an "up" pinched rail, to a full fat rail through the middle, to a down rail with the hard edge on bottom starting in front of the fins. I did a bit of an S deck with the scooped out nose up front. The tail is a chunky, it's hard to foil out such a short thick board, this is on a 5'-8" x 23" x 3". The bottom has belly up front, to flat, to a pretty deep concaved vee through the back third of the board.
This thing works really well for me with that particular bottom and quad setup. I'm 210 lbs and when I make another one I'd make it a lot thinner and try to foil it out a bit more too, like I said it works really well but it's waaaay to chunky even for me.
Right on Johnny! That's pretty much what I had in mind for this, a little belly up front with bit of a piched rail easing into a downrail with a hard edge as it goes to the back. I just wasn't sure what kind of thickness I should aim for on the tail and the nose with the S-deck. I was thinking 1.75" in the back and 1.5" up front. I'm sure it'll sort itself out when I start foiling it. Do you recall what your thicknesses were?
I'm coming from 30 years of longboards and my head is having a hard time getting around the idea of something as short as 5-8" so I figured I'd add a couple inches and foil it out a little more. See how it goes...
I'm not exactly sure but at the tail I'd say it's around 2-3/8" at least, it's pretty thick back there, I used a 6-10A blank to get the low rocker but that blank is a beast, super thick. Not sure what the nose is, I didn't try to hit any particular numbers, just scooped the nose area out till it looked good.
I made a 7-0 simm hullish type board and would say that it's closer to those liddle pics you posted as far as the S deck, rails and a thinner foil. That thing is super fast and really responsive, if I made another mini simmons I'd thin it out and refine it a lot more than my first one.
Made some changes to the outline and finished getting the rocker how I want it on the bottom. I started to lay out a rail band but now see that I have a little more work to do on the deck to get it right.
I think your template is looking pretty good for what you're trying to do.
On a related note
This is a 2+1 hull in a 6-2 length. He runs the wide point closer to the center on these than on his longer singlefins. This board has a very different foil and bottom in the tail than your's because it's designed to run as a hull, not a keels. But there are otherwise some similarities in the template and bottom in the nose. One difference with the Simmons is that they usually run the wide point well behind center, the idea being to surf them off your rear foot. That's what you're going to be using that harder corner in your tail for, to get the distinct break when you turn.
The other thing that you might start giving some consideration to at this point is exactly what your stance is going to be and where your rear foot goes on this board. With the longer length it might work better as a split keel (speed dialer or similar) or other quad setup. And if you anticipate retaining that longboard stance you might also consider running your fin cluster a little further forward, closer to your rear foot. It's harder to turn a fin cluster if you're standing significantly forward of it. You have more leverage on the fins if you're weighted directly above them. This is the number one problem novice and even some intermediate surfers have, trying to turn from too far forward of their fins.
Thanks gdaddy. I noticed that the MS outlines were centered more to the rear of the board and I have my widepoint right at the center. I'd rather turn it closer to the center of the board than have it be too rear-footed. I had originally thought of running some big single sided keel fins canted in a couple degrees and set a little further forward than typical on a true MS, but am tossing around the idea of a quad set up like you say.
Either a quad or a long keel will work on the board so that's not really the question. The question is which will be better for you at your current skill level. It's kind of like asking whether you want the board to fit your existing stye or do you want to adjust your style to fit that board.
One of the guys I shape (at 260#) for has an 8ft Simmons with the keels mounted in the traditional position. He can surf that board. I can't. I'm not as big as he is and I'm not accustomed to turning a 10-11ft pig-type longboard off the very tail the way he does on his other boards. I'm much lighter than he is and I don't longboard. I'd have a better shot at turning that board if it was set up as a quad with the cluster moved forward but it's still way too much surface area for me to really feel comfortable trying to control.
If you look around I think you'll find it more common for these boards to be set up with a quad than with regular keels or the moon keels of the original.
One of the criticisms of keels is that they're harder to turn and less stable on your backside. That's doubly true when they're on a Simmons-type tail block.
Good points for sure. I'm a decent surfer, not great but I've been at it for over 35 years and have just grown stagnant on the boards I have had over the years and just wanted to try some different shapes. I picked up a few blanks to try my hand at shaping some new things to try out. I've been a craftsman all my life and while I have never shaped a board, I have done extensive repairs over the years, studied shapes and why they work or don't, as well as having been a boatbuilder, I figured 'why not?'. So for this board I wanted to just make one of these short/wide twin fins that I've heard so much about for so long, give it a try and go from there. The experience will teach me a lot in the direction I go with the next shape. I know I want to try a twin fin as well as a quad and a fish too. I'm totally open to changing the way I ride a board and am keeping an open mind. I have boards that can only be ridden well from one end or the other as well as ones that work best from the middle. I prefer a board that is surfed more from the middle lately.
I laminated a blank from shop scraps I had from previous projects and made some fins already after researching profiles and different NACA foils. I may or may not use them on this board... I'll post a pic of them, and get your opinion