Unsung and unmentioned in the summer-long skirmishes among the four 12-meter boats which contended for the privilege of defending the America's Cup, a group of young men did hard labor comparable to the worst in Two Years Before the Mast. Sandwiched between the majestic strategy-planners aft and the headsail-setters forward, they engaged in everlasting struggle with the "coffee grinders," the massive winches with which a 12's wondrously heavy sails are trimmed. Typical of the winch-pumpers on all the boats is 23-year-old Pete du Pont, aboard the now-eliminated Weatherly. Like his colleagues, Pete is an accomplished skipper, with racing experience that ranges from Long Island Sound to the Baltic Sea and from his father's 64-foot schooner Barlovento to his own 12�-foot Herreschoff Bulls-Eye. On the Weatherly, however, Pete's sporting domain was limited to battling his coffee grinder and judiciously distributing his prone weight. "You get dog-tired grinding genoas that feel as though they are made of boiler plate instead of Dacron," says Pete, speaking for all winch-pumpers. "The only time you get the big picture is running downwind with spinnaker set. Then you see the opposition. But it is a terrific thing to have been part of a team so dedicated. I'm the luckiest guy in the world."