Breaking Strains by Diameter
The figures below are manufacturer-published minimum break strengths for the named rope products. They are not safe working loads. Rope selection should also consider application, deck hardware, splices, bend radius, condition and appropriate safety factors.
| Diameter (mm) | Kingfisher Braid on Braid | Kingfisher Dyneema Cruise | Kingfisher Racing Dyneema 78 Melange | Marlow D2 Racing 78 |
|---|---|---|---|---|
| 6 mm | 820 kg | 1,100 kg | 1,894 kg | — |
| 8 mm | 1,300 kg | 2,100 kg | 3,570 kg | 3,140 kg |
| 10 mm | 2,400 kg | 3,400 kg | 5,250 kg | 4,930 kg |
| 12 mm | 3,200 kg | 5,200 kg | 7,650 kg | 6,250 kg |
| 14 mm | 4,500 kg | 6,700 kg | 10,150 kg | 8,530 kg |
| 16 mm | 5,900 kg | — | 12,950 kg | 11,600 kg |
What the Figures Show
- Kingfisher Braid on Braid is a heat-set polyester cruising rope designed for halyards, sheets, control lines and general-purpose use.
- Kingfisher Dyneema Cruise combines a Dyneema core with a polyester cover and provides higher strength and lower stretch than an all-polyester cruising rope.
- Kingfisher Racing Dyneema 78 Melange uses a Dyneema SK78 core with a high-tenacity polyester cover and is intended for performance halyards, sheets and control lines.
- Marlow D2 Racing 78 uses a pre-stretched Dyneema SK78 core with a polyester cover and is designed for high-strength, low-elongation running rigging.
Important: break strength alone should not be used to select rope diameter. Clutch and jammer compatibility, sheave diameter, handling, elongation, abrasion and the loads generated by the individual yacht all matter.
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