spinnaker

The most popular etymology traces spinnaker to the yacht Sphinx. Sometime in the 1860s, a large downwind sail was first flown — possibly aboard a vessel called Sphinx or Sphinxer. Crew members or competitors, trying to say 'Sphinx's acre' (or 'Sphinx's maker'), supposedly garbled it into spinnaker. The story is charming but unverified. No contemporary record names the exact boat or date.

Alternative theories abound. Some connect it to spin — the sail was set when 'spinning' before the wind. Others suggest it comes from a dialectal pronunciation of spanker, another type of sail. The British yachting press first used the word spinnaker in print in the 1860s, but by then it was already common enough in spoken use that no one thought to record its birth.

Whatever its source, the spinnaker transformed downwind racing. The sail is enormous — a parachute-like canopy of nylon that billows out from the bow, capturing wind that a conventional sail cannot reach. Flying a spinnaker in heavy air requires nerve and skill. A botched hoist can wrap the sail around the forestay, and a sudden gust can overwhelm the boat. Sailors call a spinnaker accident a 'Chinese gybe' or simply a disaster.

The America's Cup, first raced in 1851, drove spinnaker innovation throughout the twentieth century. Modern asymmetric spinnakers, used on foiling boats, bear little resemblance to the original but still carry the name. A word with an uncertain past now appears on sails that cost more than houses.