A review of the analytical methods used for seaplanes’ performance prediction
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paper_title: Wing in ground effect vehicle

paper_content:

This survey has the objective of reviewing research and development of wing-in-ground effect technology. Starting with definitions of the phenomenon and the craft which takes advantage of the ground effect (GE), the history and perspectives of the technology, specific vehicles and projects, and areas of application are covered. Special attention is paid to GE aerodynamics, its mathematical modeling and the stability of longitudinal motion. Also briefly discussed are issues of motion control, structural design, materials and economics. Covered in more detail are matters related to rules of classification, safety and certification. Conclusions are followed by a bibliography, including about 769 entries.
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paper_title: Dynamic Stability of a Seaplane in Takeoff

paper_content:

This research is based on the investigation into the dynamic stability associated with seaplanes during takeoff. Various forces acting on a hydroplaning hull form have been empirically defined. Such empirical data have shown that, under a certain set of conditions, a hydroplaning hull will begin to porpoise: an instability oscillation in both the vertical direction and about the center of gravity. To investigate the porpoising motion, a shallow water flume was used. It was the first time that such a facility had been used to simulate the dynamic motion of hydroplaning hull forms. An experimental method derived from the store release experiments was derived for the dynamics measurements. The equipment developed led to an analysis of a flat-plate hull porpoising in a supercritical channel. The porpoising limit was then very well defined.
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paper_title: Planing-surface tests at large Froude numbers - airfoil comparison

paper_content:

The take-off capacity of a flying boat depends upon the design of the hull bottom ahead as well as aft of the step. Systematic tests - largely made by industry itself - had proved the benefit accruing from a well designed hull bottom long before theoretical insight into the flow phenomena involved had been obtained. The theoretical framing of the problem was beset with serious difficulties and, though restricted to the processes within range of the planing bottom ahead of the step, the solutions do not yet afford a comprehensive survey.
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paper_title: Guidance and control of ocean vehicles

paper_content:

Modeling of Marine Vehicles. Environmental Disturbances. Stability and Control of Underwater Vehicles. Dynamics and Stability of Ships. Automatic Control of Ships. Control of High--Speed Craft. Appendices. Bibliography. Index.
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paper_title: Modeling of Ship Roll Dynamics and Its Coupling with Heave and Pitch

paper_content:

In order to study the dynamic behavior of ships navigating in severe environmental conditions it is imperative to develop their governing equations of motion taking into account the inherent nonlinearity of large-amplitude ship motion. The purpose of this paper is to present the coupled nonlinear equations of motion in heave, roll, and pitch based on physical grounds. The ingredients of the formulation are comprised of three main components. These are the inertia forces and moments, restoring forces and moments, and damping forces and moments with an emphasis to the roll damping moment. In the formulation of the restoring forces and moments, the influence of large-amplitude ship motions will be considered together with ocean wave loads. The special cases of coupled roll-pitch and purely roll equations of motion are obtained from the general formulation. The paper includes an assessment of roll stochastic stability and probabilistic approaches used to estimate the probability of capsizing and parameter identification.
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paper_title: Longitudinal Stability Augmentation of Seaplanes in Planing

paper_content:

The towing tank experiments conducted at Yokohama National University from November 30 to December 9 in 2005 suggested a new way of suppressing a dangerous coupled motion between heave and pitch called porpoising. The research in this paper was developed on the observations made in the experiments and conducted numerical simulations to further investigate the parametric design space. Two linear-time-invariant models were developed: rigid-body planing craft (conventional float planes or flying boats), and flexibly supported planing craft. The latter could simulate the new method found in the experiments for suppressing porpoising. In this study, the stability of the oscillatory motions was analyzed to see the effect of design variables on the inception of porpoising. The parametric study of flexibly supported float planes in the context of porpoising was a new contribution in the conceptual design of seaplanes.
---
paper_title: Modeling of Ship Roll Dynamics and Its Coupling with Heave and Pitch

paper_content:

In order to study the dynamic behavior of ships navigating in severe environmental conditions it is imperative to develop their governing equations of motion taking into account the inherent nonlinearity of large-amplitude ship motion. The purpose of this paper is to present the coupled nonlinear equations of motion in heave, roll, and pitch based on physical grounds. The ingredients of the formulation are comprised of three main components. These are the inertia forces and moments, restoring forces and moments, and damping forces and moments with an emphasis to the roll damping moment. In the formulation of the restoring forces and moments, the influence of large-amplitude ship motions will be considered together with ocean wave loads. The special cases of coupled roll-pitch and purely roll equations of motion are obtained from the general formulation. The paper includes an assessment of roll stochastic stability and probabilistic approaches used to estimate the probability of capsizing and parameter identification.
---
paper_title: Longitudinal Stability Augmentation of Seaplanes in Planing

paper_content:

The towing tank experiments conducted at Yokohama National University from November 30 to December 9 in 2005 suggested a new way of suppressing a dangerous coupled motion between heave and pitch called porpoising. The research in this paper was developed on the observations made in the experiments and conducted numerical simulations to further investigate the parametric design space. Two linear-time-invariant models were developed: rigid-body planing craft (conventional float planes or flying boats), and flexibly supported planing craft. The latter could simulate the new method found in the experiments for suppressing porpoising. In this study, the stability of the oscillatory motions was analyzed to see the effect of design variables on the inception of porpoising. The parametric study of flexibly supported float planes in the context of porpoising was a new contribution in the conceptual design of seaplanes.
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Title: A review of the analytical methods used for seaplanes’ performance prediction

Section 1: Introduction
Description 1: Introduce the topic of seaplanes, the motivation for the study, and the scope of the paper. Mention the sections that will be covered in the paper.

Section 2: Seaplane Motion Characteristics
Description 2: Discuss the unique motion characteristics of seaplanes, explaining the different operational regimes and forces acting on the seaplane.

Section 3: Seaplanes Performance Prediction Methods
Description 3: Introduce the various performance prediction methods for seaplanes and discuss their strengths and weaknesses.

Section 4: Heave and Pitch Equations of Seaplane Motion
Description 4: Present the heave and pitch equations used to predict seaplane motion, detailing the methodology and underlying principles.

Section 5: Results and Discussion
Description 5: Compare the stability characteristics obtained from heave and pitch equations to other methods, and discuss the relationship between dead-rise angle and lift coefficient.

Section 6: Conclusion
Description 6: Summarize the findings of the paper, emphasizing the strengths and weaknesses of the analytical methods discussed, and suggest potential extensions or improvements.

Section 7: Appendix
Description 7: Provide supplementary material such as detailed calculations, code, or additional figures referenced in the main sections.