I had a slightly alternative design concept knocking around in my head for some time. Putting it together with some scrap plywood, paulownia and XPS I had hanging around was the next logical step.
My aim was to compress a 9’ pig style longboard and it’s associated glide, volume, weight and graceful turning characteristics down into a more manageable 6’. Planshape is basically the 9’ pig with 3’ cut off the nose. 24” wide and a constant 4” thickness from nose to tail. I have used no rocker at all. There is a constant 1” belly (if you include the lower rail profile curve it’s even more) the entire length to compensate for the absence of rocker, and I estimate it’s volume to be around the 70 litre mark (at least), and its weight to be around 12kg (deliberately) when finished.
With the short length, reasonable planshape curve and extreme belly it should still be manoeuvrable enough for what I want, despite having no rocker. When you trace the water path across the bottom of the board at an angle (during turning for example) there is actually quite a generous amount of rocker built into the bottom, but in a straight ahead paddling mode it's all flat, with just the front 100mm of nose block having any lift shaped into it.
When finished I'm hoping that it will surf like an "invisible" longboard in that you will feel like you’re surfing a longboard but you won’t be able to see any evidence of it in your peripheral vision as you surf it. I was encouraged to do it after spotting an old Swaylocks hotcurl design thread and seeing their super thick rear ends and minimal rocker. So I guess you could also consider it a reduced length, finned hotcurl design of sorts.
Will it work? I can’t be sure, but I needed to find out.