From the Loftsmith Workshop
6'0" swallow-tail surfboard core
The shaped blank for a six-foot swallow-tail surfboard, ready to glass into your own board. It comes in 18 parts, so it prints on a normal bed, and there's a small hole near the nose for a leash. Change the length, thickness or swallow notch to suit your waves.
18 parts · 3020 g · 1829 × 489 × 129 mm
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No adjustable sizes
Ask for the sizes you want to tweak, e.g. “make the width adjustable”.
How to print it
Parts
- section-1-left · PLA · Flat centre face on the bed, rail up
Tail station, left: swallow point, half of the leash and centre-fin pockets. Base of the glue-up.
- section-1-right · PLA · Flat centre face on the bed, rail up
Tail station, right; joins section-1-left on the 2 dowels.
- section-2-left · PLA · Flat centre face on the bed, rail up
Left side fin pockets.
- section-2-right · PLA · Flat centre face on the bed, rail up
Right side fin pockets.
- section-3-left · PLA · Flat centre face on the bed, rail up
- section-3-right · PLA · Flat centre face on the bed, rail up
- section-4-left · PLA · Flat centre face on the bed, rail up
Widest piece, 245 mm.
- section-4-right · PLA · Flat centre face on the bed, rail up
- section-5-left · PLA · Flat centre face on the bed, rail up
- section-5-right · PLA · Flat centre face on the bed, rail up
- section-6-left · PLA · Flat centre face on the bed, rail up
- section-6-right · PLA · Flat centre face on the bed, rail up
- section-7-left · PLA · Flat centre face on the bed, rail up
- section-7-right · PLA · Flat centre face on the bed, rail up
- section-8-left · PLA · Flat centre face on the bed, rail up
Nose, left.
- section-8-right · PLA · Flat centre face on the bed, rail up
Nose, right.
- dowel ×2 · PLA · Standing up
6 x 16 mm; lines up the two tail halves.
Print settings
- Layer height
- 0.2 mm
- Walls
- 3
- Infill
- 15%
- Supports
- None
- Notes
- Each half lies on its flat centre face, so it has a big footprint and needs no brim.
Hardware
- 6 × FCS-style fin plug (dual tab) · Two per fin. Pockets are 16 x 29 mm with a pointed roof so they print without support; the bedding resin fills the roof. Set the Plug pocket sliders to your actual plugs first.
- Leash plug (surfboard cup) · 25 mm wide x 22 mm deep pocket, set in resin.
- 2 × Fibreglass cloth, ~200 g/m² (6 oz) · 2 layers on the deck and 1-2 on the bottom, lapped around the rails and into the notch.
- Low-heat (slow) laminating epoxy · About 1-1.5 kg. PLA softens around 55 °C.
- Gore-Tex surfboard vent plug · Recommended for a hollow core.
- Thickened epoxy for joining sections
Assembly
- Dry-fit first. Glue section-1-left and section-1-right together on their centre faces with the 2 dowels, and check that the swallow points line up.
- Glue each next pair of halves together, then slide that station onto the previous one so its pegs go into the grooves. Work from the tail to the nose on a flat surface so the rocker stays true.
- Sand the joints, the rails and the inside of the notch smooth. Fill any gaps with epoxy and microballoons.
- Set the 6 fin plugs and the leash plug in epoxy, using a jig for toe and cant. Fit the vent plug.
- Glass the bottom, then the deck, lapping the cloth around the rails and into the notch. Hot coat and sand.
Good to know
- This build only checked the default settings. I sized the new slider ranges from the numbers, so drag a few sliders to their ends on the Adjust tab and make sure the checks stay green.
- The weight budget is now 1.75x a foam board of the same size, not a flat 4.5 kg. The stock board comes in at about 4.47 kg, heavier than a ~2.8 kg foam board. The 'Form reads boxy' warning on sections 2-5 is the square inside corners where the end walls meet the shell. They are hidden under the glas
- The FCS pocket sizes come from forum posts, not official specs. PLA softens around 55 °C. The board's strength comes from the glass and hasn't been tested, so check the fin and tail areas after your first sessions.
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