We have been singing the praises of the 'Quartet' design from Neal Purchase Jnr for a while now. The most common questions we get from people are: "How do they work?" / "What is the go with the glassed on fins?" / "Why do they look so different to other quads?"
I lifted the following content & video from Neal's web site. It provides all the answers you need & why they look the way they do. If you don't like to read then check the video of Jason 'Salsa' Salisbury. Like they say.....a picture is worth a thousand words.
We have only got 2 boards left from the last batch of quartets. Pics etc are on here a few posts back. Drop by & check one out if you like what you see.
Neal Purchase Jnr: "The design came from riding and experimenting with twinnies around 2009
using MR-style fins. I really like the speed they had but the ones I
rode spun out through a carve, so I moved the fins back to 7 1/2 “ from
the tail and they felt quite good. I just wanted a bit more stability
without going to a longer based, bigger keel twin. I was riding those
for ages around 2001-2004 in the Fish renaissance.
added the smaller back stabilisers, and moved them up to 6 1/4 for the
back fins and 10 1/2 for the fronts. Actually the front fins were at 10
3/4 originally then after a few trials I preferred a more clustered set
up at 10 1/2 . They are both the same cant, and both towed 2” from the
nose. Together they are really drivey and predictable. I've always liked
clustered fins, they release a lot faster and they pivot nice in the
pocket. Fins that are spread out tend to work against each other
through a turn and slow you down. So being clustered they almost still
feel like a twin fin except with way more drive.
The fins have to be glass ons which is hard for the sanders, but there
isn’t a fin system strong enough to hold the front MR fins. It’s these
G-forces and drive which accelerate and catapault you out onto the face
and out of turn, with the smaller back fins guiding and releasing with a
controllable fin area. The big front and smaller back actually
naturally want to turn when pressure is applied.
I actually like a full round tail for an all rounder, but Salsa saw a
double-ender pin tail I did for a Nick Chalmers and wanted one of
those. I thought it could be cool for Indo too with the pin stabilising
the fin set up. I used the same nose template for the tail. He had been
riding single fins and all sorts of boards, and I have been there too so
we kinda had that connection I guess. I saw some footage of him in
that Tracking movie, which was
beautifully shot, but I could see the boards holding him back. He’s a
great surfer, tube rider and stylist. I could see a lot of myself in him
actually - ha!
The size, shape and area of the board had been based off what I’d been
making for years with a formula of compact volume and area, 3-4 inches
shorter and around an inch or so wider than standard short boards. It's
meant to work in a broadrange of conditions. I was incorporating a lot
of old templates of my fathers, and MP-like stuff in the outline with
the wide point 2” forward 'cause they are shortish boards. They have a
bit of hip in the tail outline around the fins for release.
Lower rocker in a smaller board, for paddling and planing and you can
over power 'em. The Quartets are best surfed shortish. The bottom shape
is slight vee or flat entry, to single or double concave around front
foot, going to slight spiral vee in the tail, I think all twinnies and
quads need a bit of vee around the fins. All very subtle though, around a
1/8 ", not like most deep modern concaves or old vee bottoms you see
around. The volume foil is forward with the thickest area being around
the chest for paddling - more traditional, I guess. The deck is slightly
rolled to a low softish rail.
They were made for general East Coast Australian conditions. Good for
point stuff too. They excel in the barrel, I think most quads do. With
those large side fins hugging the face you can sit up higher and go
faster without a back single fin slipping."