3/19/2024 0 Comments Name three basic hull shapesJet boats can have inboard or outboard jet drives. May power larger vessels-commonly used for vessels designed for shallow water conditions.PWC are most common type of vessels using jet drive.Jet drives propel vessel by jet of water forced out back of vessel.Steering controlled by drive unit that swivels like outboard.Four-cycle automotive engines adapted for marine use.Mounted inside vessel and attached through transom to drive unit.PWC steering controlled by jet flow of water.Steering is controlled by rudder behind the propeller (except PWC and jet drive boats).Four-stroke automotive engine adapted for marine use.Mounted inside hull’s midsection or in front of transom.Steered by controlling tiller or steering wheel.Higher HP-to-WT ratio than other engine types.Vessel Terminology (cont.) Transom:Vertical surface at the back of the hull Multi-HullAnother displacement Needs large area hull has greater stability when turning. Hull Types and Shapes (cont.) Hull ShapesĚdvantagesĝisadvantages Round Bottom HullTypical displacement hull Has a tendency to roll that moves easily through unless it has a deep water even at slow speeds. bottom hull may roll or bank in sharp turns. Deep Vee HullPlaning hull gives Takes more power smoother ride in rough to move than a flat water. Hull Types and Shapes (cont.) There are four basic hull shapes Hull ShapesĚdvantagesĝisadvantages Flat Bottom HullPlaning hull with shallow Rides roughly in draft good for fishing in choppy waters. Planing hulls rise up and glide on top of the water. Hull Types and Shapes Displacement hulls are designed to cut through water. 26 feet to less than 40 feet (Class 2).
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