nemo
04-20-2005, 01:03 PM
Hi,
I'm dealing with a 7 metres runabout design. The boat will be equipped with a waterjet, and the jet unit has to stay entirely below the swimplatform.
Following Hamilton's advices on hull shape near inlet, the hull is flat in the centre at stern, and "chamfered" to the prismatic hull (constant deadrise=20°) with a triangle. Now I think the static draft is too much, the boat won't weigh so much.. any advise on how to reduce it, maintaining the necessary height for the waterjet unit below the swimplatform? Maybe I can change the deadrise angle, but it would mean a lower deadrise at amidship than at stern, which is usually the opposite.
I'm dealing with a 7 metres runabout design. The boat will be equipped with a waterjet, and the jet unit has to stay entirely below the swimplatform.
Following Hamilton's advices on hull shape near inlet, the hull is flat in the centre at stern, and "chamfered" to the prismatic hull (constant deadrise=20°) with a triangle. Now I think the static draft is too much, the boat won't weigh so much.. any advise on how to reduce it, maintaining the necessary height for the waterjet unit below the swimplatform? Maybe I can change the deadrise angle, but it would mean a lower deadrise at amidship than at stern, which is usually the opposite.