A Review of the Analytical Methods used for Seaplanes Performance Prediction

Masri, Jafar, Dala, Laurent and Huard, Benoit (2019) A Review of the Analytical Methods used for Seaplanes Performance Prediction. Aircraft Engineering and Aerospace Technology, 91 (6). pp. 820-833. ISSN 1748-8842

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Abstract

Purpose – this paper aims to investigate the different analytical methods used to predict the performance of seaplanes in the wing-in-ground effect region. This was achieved by comparing between the analytical methods available in the literature. The paper also addresses the weaknesses in each method and states which of them can be expanded to include the nonlinear effects.

Design/methodology/approach – first of all, the elemental hydrodynamic characteristics of seaplanes are discussed. Secondly, five different analytical methods are reviewed. The advantages and disadvantages of each method are stated. After that, the heave and pitch equations of seaplane motion are illustrated. The procedure of obtaining the solution of the heave and pitch equations of seaplane motion is explained. Finally, the results obtained from the most common methods are compared.

Findings – the results show that the current analytical methods available are based on different assumptions and considerations. As a result, no method is optimal for all types of seaplanes. Moreover, some of the analytical methods do not study the stability of the seaplane which is a major issue in the design stage. Also, no method takes in consideration the nonlinear effects of motion of seaplanes in heave and pitch axes.

Practical Implications – the previous work has many limitations and only applicable under some assumptions. There was insufficient work to define the motion of the craft in the in-ground effect region where the craft experiences nonlinear characteristics. In order to be able to define the motion in this region, the analytical methods available have to be investigated and compared.

Originality/value – the information provided in the research paper can be used by seaplane designers to distinguish between the analytical methods available and gives them valuable insight into the dynamic stability of seaplanes. The work can also be extended to provide better understanding of the wing-in-ground effect phenomenon.

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