Did a similar experiment. Found that corbitas must weigh between 1399.7kg and 1400.50kg, which means that someone with 20 strength could drag one if they dropped everything.
*Size: 5 tiles by 2 tiles
*Height: 25 dirt from water level to deck
*Weight: 1400kg (20 strength minimum to drag)
{{Infobox|Boat speeds are relative and depend greatly on weather conditions.}}