Beneteau Oceanis 440: rig report
DEMO: these results are replayed from the notebook study of this boat, stored in tests/reference/beneteau-oceanis-440-1994.viewer.json. They don't change when the boat file changes. The list of estimates below does come from this boat file.
An engineering estimate, not a rig survey. From boats/beneteau-oceanis-440-1994.yaml, rigframe 0.1.0.dev0,
2026-11-06.
Estimates: what to measure (32 of 62 inputs)
| Input | Value used | Note |
|---|---|---|
hull.GZ30 | 0.70 m | No stability curve found; CE stability documents would replace it. |
sail_plan.headsail_LP | 135 % | |
sail_plan.reef_fraction | 60 % | |
masts[0].step | keel | |
masts[0].heel_z | -1.90 m | |
masts[0].gooseneck_z | 1.75 m | |
masts[0].above_hounds | 0.25 m | |
masts[0].section.luff_slot | 26 mm | Read off the profile drawing. |
masts[0].section.J | 650 cm^4 | Traced from the owner's profile drawing, forward cell closed. |
masts[0].section.yield | 240 MPa | Z-Spars' alloy is not stated. |
masts[0].spreaders[0].height | 37 % | |
masts[0].spreaders[0].length | 1.35 m | |
masts[0].spreaders[0].sweep | 15 deg | |
masts[0].spreaders[1].height | 68 % | |
masts[0].spreaders[1].length | 0.81 m | |
masts[0].spreaders[1].sweep | 15 deg | |
masts[0].spreader_section.chord | 120 mm | |
masts[0].spreader_section.depth | 35 mm | |
masts[0].spreader_section.A | 5.0 cm^2 | |
masts[0].spreader_section.I_vertical | 12 cm^4 | |
masts[0].spreader_section.I_horizontal | 80 cm^4 | |
masts[0].spreader_section.J | 30 cm^4 | |
masts[0].shrouds.cap.size | 10 mm | |
masts[0].shrouds.cap.chainplate.x | -0.40 m | |
masts[0].shrouds.cap.chainplate.y | 1.70 m | |
masts[0].shrouds.intermediate.size | 8 mm | |
masts[0].shrouds.lowers.aft.chainplate.y | 1.70 m | |
masts[0].shrouds.lowers.forward.chainplate.y | 1.65 m | |
stays[0].size | 10 mm | |
stays[1].bottom.x | -8.55 m | |
stays[1].bottom.z | 0.30 m | |
stays[1].size | 8 mm |
All cases at a glance
| Case | Solver | Governing wire | SF | Peak mast stress |
|---|---|---|---|---|
| Dock tune | Pynite P-Delta | cap V1 (port) | 4.91 | 48 MPa · 20% |
| Full sails, RM ×1.0 | Pynite P-Delta | cap V1 (port) | 3.34 | 53 MPa · 22% |
| Full sails, RM ×1.5 | Pynite P-Delta | cap V1 (port) | 2.88 | 57 MPa · 24% |
| Headsail only, RM ×1.0 | Pynite P-Delta | cap V3 (port) | 2.73 | 49 MPa · 20% |
| Reefed main only (60% of P), RM ×1.0 | Pynite P-Delta | forward lower D1F (port) | 4.57 | 86 MPa · 36% |
| Forestay sag, RM ×1.0 | OpenSees corotational | forestay | 2.53 | 56 MPa · 23% |
| Forestay sag, RM ×1.5 | OpenSees corotational | forestay | 2.05 | 62 MPa · 26% |