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Ramming a 9 ton sailboat into a rock ledge at 9 mph

submitted by SFOGuy

1 decade 2 months 4 weeks ago

So, sailboats sometimes go aground; they touch the bottom, or they ram it---and the effects on the boat can range from mildly annoying to catastrophic. It sort of all depends on what happens to the various parts of the sailboat that hang downward---mostly, the keel and rudder.

However, I've never seen someone repeated crash test a 9 ton sailboat's keel against a rock ledge at higher and higher speeds. 9 tons of boat moving at over 9 MPH is a lot of kinetic energy---and somehow, because this new sailboat has a flexing keel, it somehow tolerates all this without ripping the bottom out of the boat or snapping off the keel. Which can happen.

There are places where the bottom is mostly granite ledges/rock---like the coast of Maine and apparently, Sweden, where this sailboat is from. Nonetheless, this is really WTF for anyone who has spent considerable time and energy making sure they DON'T touch bottom in a boat.

(Translation from the Swedish below, courtesy of Google).

- Linjett 43 weighs 9 tons and at impact taking the keel (3.5 tonnes) against the greatest force in a push up / back in kölfickan, the oscillation becomes closer to 70 cm (!) Back for the bulb says Markus Gustafsson, CEO of Rosättra Boatyard.

A költrumma (lifting keel?) hidden in the sail boat's salon table. A hydraulic piston allows the helmsman to raise and lower with a range of 2.45 to 1.90 cm at 30 sec. The camber gives the boat an unbeatable combination of sailing performance and access to shallow bays in the archipelago.

- We can confirm that the boat is completely intact except for marks on the keel and quenching in költrumma. Inside, no visible damage or even cracks on both the keel structure, ground beams or interior continues Markus Gustafsson.

On Rosättra Boatyard is one very satisfied with the outcome. The keel will be optional for Linjett 43rd