A research programme on high speed marine vehicles fitted with aerodynamic
surfaces started in Cranfield University in 2005. One of the configurations
analyzed is a high speed prismatic planing hull with one or more aerodynamic
surfaces; it is called a hybrid vehicle (HV). Two mathematical models have been
developed for the dynamic behavior which is a combination of the very different
behaviors of aircraft and ships. The first model estimates the equilibrium
attitude of the HV at a certain speed. A parametric analysis for the influence
of the configuration on the performance of the HV has been conducted (1). With
the second model, the authors propose a set of ordinary differential equations
of motion, derived in the frame of small-disturbance stability theory which has
been used to investigate the longitudinal dynamic stability of the HV (2). Ref.
(1) and (2) present a complete description of the mathematical models, while
this article summarizes the methodology adopted to develop these dynamic models
and gives a brief summary of the results. (1) COLLU, M., PATEL, M. H., TRARIEUX,
F., A Mathematical Model to analyze the Static Stability of Hybrid (Aero-
hydrodynamically supported) vehicles., 8th Symposium on High Speed Marine
Vehicles 2008 (HSMV08), Naples, Italy, 2008. (2) COLLU, M., PATEL, M. H.,
TRARIEUX, F., A Unified Mathematical Model for High Speed Hybrid (Air and Water-
borne) Vehicles., 2nd International Conference on Marine Research and
Transportation, 2007