RAN Sailingvideo

Building the Swim Platform and Tackling Compound Curves - Ep. 483 Ran Sailing

3 April 2026 · 18 min · 96K views · Skåne

Johan rolls resin fabric onto blue swim platform under vacuum

What this video covers

Johan constructs a swim platform and complex transom sections for a 52-foot custom sailboat. To build the platform, he laminates a foam panel using three layers of 600-gram biaxial fiberglass on each side, vacuum-bagging the assembly with breather, perforated release film, and peel ply.4:03 He cuts the cured panel to size using a shaper to achieve precise curves at the stern.5:44 The finished platform measures approximately 700 millimeters deep and 2.6 meters wide.10:09 To address the compound curves of the transom sides, Johan creates internal templates at three different levels to hold the foam in the correct shape before laminating the exterior.11:01 He uses cardboard to template the transom geometry and makes relief cuts in the foam to facilitate the arc.13:47 Additionally, he installs foam fillets against bulkheads to improve structural stiffness through tabbing.2:25 The process demonstrates that using internal molds allows for accurate shaping of complex, multi-directional curves in foam-core construction.

Watch on YouTube

More from RAN Sailing

This Is Where Boat Builds Break People - Ep. 501 Ran SailingAug 2026Our 52ft Sailboat Build Reaches Another Milestone! - Ep. 500 Ran SailingAug 2026How Many Hatches Does a 52ft Sailboat Need? - Ep. 499 Ran SailingAug 2026Making Our Sailboat One Solid Structure - Ep. 498 Ran SailingAug 2026

From RAN Sailing — see the channel’s boat, crew, and every analysed video.

The Sailing Directory Newsletter

One email with the fleet's best finds — the moments, boats, and stories worth your watch time. Enter your own address to get your own copy.

Report an issue