Can hull design prevent speedboats from flipping?

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SUMMARY

The discussion centers on the impact of hull design on the stability of speedboats, particularly regarding the torque produced by submerged motors. It asserts that as speed increases, the bow of the boat may rise, increasing the risk of flipping. Key factors influencing this stability include hull water drag, hydrodynamic lift on the planing surface, air drag, and the gravity vector. Effective hull design is crucial for managing these forces to maintain balance and prevent capsizing.

PREREQUISITES
  • Understanding of hydrodynamics and its principles
  • Familiarity with speedboat design and hull shapes
  • Knowledge of torque and its effects on stability
  • Basic concepts of aerodynamics related to watercraft
NEXT STEPS
  • Research "hydrodynamic lift on planing surfaces" for insights into speedboat stability
  • Explore "angle of attack" in relation to speedboat performance
  • Study "hull design optimization" techniques for enhanced stability
  • Investigate "force management in speedboats" to understand balance dynamics
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Marine engineers, speedboat designers, and enthusiasts interested in optimizing speedboat performance and stability through effective hull design.

fahraynk
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If a speedboat has a motor that goes below the boat into the water, then shouldn't that motor produce a torque on the boat?
Shouldn't that torque cause the bow of the boat to rise? And the faster it goes, the more likely it will flip?
 
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Google "angle of attack" and "resultant force."
 
Prop force vector (3D) is but one total force there are: hull water drag, hydrodynamic lift on planing surface, air drag and lift topside and below, gravity vector. All can be in or out of balance at steady top speed and while accelerating. In the outboard hydros I run there is a sensitive balance to keep it right side up. Hull design is a great part of success of force management.
 
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