May 21, 2021 (Google Translation) – As part of the preliminary draft of the new generation aircraft carrier (PA-Ng) notified in March 2021, the General Directorate of Armaments (DGA), project owner of the program, is continuing its work on performance of the future aircraft carrier. In April, the DGA carried out maneuverability tests of the PA-Ng model at Lake Castillon (Alpes de Haute-Provence).
For three weeks, engineers and technicians from the expertise and test centers of DGA Hydrodynamic Techniques and DGA Naval Techniques, carried out a campaign of maneuverability tests of the model of the future aircraft carrier on Lake Castillon, medium of DGA Naval Techniques tests. Objective: to measure the turning, heading and stability performance of the PA-Ng model on a sufficiently large body of water.
These tests follow the numerical simulations, the resistance to movement tests, the self-propulsion tests and the propulsive performance tests of the propellers carried out at the DGA Techniques hydrodynamiques test and expertise center, located in Normandy.
From digital simulation to model testing
To carry out its tests, the DGA uses both digital simulation and mock-up tests.
Numerical simulation allows risks to be lifted before investing in the manufacture of the model. However, numerical simulation does not make it possible to obtain the complete physics of the phenomena, which is why tests must be carried out in real conditions.
Ten meters long, the tested platform includes three tree lines, two anti-roll keels, two pairs of stabilizers and two lateral rudders. It is equipped with propulsion motors, rudder actuators, tracking systems and a control system allowing it to autonomously perform all of the ship’s maneuvers in similarity to its behavior at sea.
An essential performance of the future aircraft carrier is in particular its ability to perform rapid U-turn maneuvers while maintaining heeling attitudes compatible with the safety of the platform, the implementation of the aircraft and the aircraft systems. weapons.
Thus, after having activated and steered the rudders at various angles, looked at the turning performance, simulated emergency stops, measured the acceleration performance or caused damage to the rudder or the shaft line, the analysis preliminary results confirm the good maneuvering performance of the model.