Open AccessDynamic Mechanics of Rigid Helicopter Systems During Ditching
Author(s) -
Mohamad Abu Ubaidah Amir Abu Zarim,
Marja Azlima Omar
Publication year - 2021
Publication title -
transactions on maritime science
Language(s) - English
Resource type - Journals
eISSN - 1848-3305
pISSN - 1848-3313
DOI - 10.7225/toms.v10.n02.013
Subject(s) - slamming , aeronautics , aviation , aircraft flight mechanics , flight dynamics , engineering , aerospace engineering , current (fluid) , marine engineering , aerodynamics , hull , electrical engineering
Aircraft and helicopter often fly above open waters and thus have to observe regulations to ensure safe water landing under emergency conditions. This practice is also referred to as ditching - one of several types of slamming problems that are under review by the current regulations of the Federal Aviation Administration (FAA) and the European Aviation Safety Agency (EASA). Ditching is related to the controlled landing on water, with distinctive features such as hydrodynamic slamming loads, complex hydromechanics at tremendous forward speeds, as well as the interaction of multiphase fluid dynamics (air, water, and vapor). This paper presents the knowledge on system mechanics during helicopter ditching. The discussion begins with the fundamental kinetics of the rigid body, and then delves into dynamic relations to describe the effect of forces on motions. In the end, the paper discusses several relevant theories to further contribute to the understanding of the problem of impact.