Sailing Doodles · vidéo

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Bobby returns the Island Spirit 525 catamaran to Ocean Marina in the Gulf of Thailand after a three-night shakedown cruise, covering roughly 15 miles at 7 knots on electric motors.▶ 0:17 The transit demonstrates the boat's hybrid propulsion system in detail: at 575 RPM per motor the drive bank draws 36–40 amps; the generator runs a three-stage warm-up sequence to 2,600 RPM and supplies 45 kilowatts, of which 17 kW charges the batteries and 28 kW drives the motors.▶ 2:08 Starting at 30% state of charge, the batteries gain 10% per 1.5 hours while motoring, meaning the generator needs to run roughly two-thirds of a continuous motoring day — equivalent to about 1.25–1.5 gallons per hour rather than two.▶ 1:04 An unresolved 500–800-watt electrical loss in the DC-to-DC converter circuit remains under investigation.▶ 0:38 Bobby also installs planing fins on the dinghy's cavitation plate to help the tender get on plane with two people seated aft.▶ 8:46 Ocean Marina Yacht Club — 450 slips, boats to 250 feet, full boatyard and travel lift — is described as the largest marina in the Gulf of Thailand.▶ 7:45 That evening Bobby visits the emergency room with a severely elevated C-reactive protein of 112 (normal 0–5), a possible pancreatitis diagnosis, and a hospital stay that would stretch over the following 10 days.▶ 10:28

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