Abstract: A method for determining an attenuation of a wind caused by a simulated obstacle and experienced by a simulated vehicle in a simulation, comprising: receiving a wind direction and an initial speed for a simulated wind; generating a line of sight vector having a source position, a given direction and a given length, the given direction being one of opposite to the wind direction and identical to the wind direction; determining a distance between the simulated obstacle and the simulated vehicle using the line of sight vector, the distance being at most equal to the given length of the line of sight vector; determining a wind attenuation gain using the distance between the simulated obstacle and the simulated vehicle; determining an actual speed for the simulated wind using the initial speed of the simulated wind and the gain for the wind attenuation; and outputting the actual speed.

Abstract: A method for determining an effect of a simulated obstacle on a main rotor induced velocity of a simulated rotorcraft in a simulation, comprising: receiving an aircraft airspeed of the simulated rotorcraft and a height above ground for the simulated rotorcraft; generating a line of sight vector having a source position located on the simulated rotorcraft, a direction and a given length; determining a distance between the simulated obstacle and the simulated rotorcraft using the line of sight vector, the distance being at most equal to the given length of the line of sight vector; determining an induced airflow velocity using the distance between the simulated obstacle and the simulated rotorcraft, the aircraft airspeed and the height above ground, the induced airflow velocity being caused by a downwash recirculation flow generated by the simulated obstacle; and outputting the induced airflow velocity.

Abstract: A method for determining an effect of a simulated obstacle on a main rotor induced velocity of a simulated rotorcraft in a simulation, comprising: receiving an aircraft airspeed of the simulated rotorcraft and a height above ground for the simulated rotorcraft; generating a line of sight vector having a source position located on the simulated rotorcraft, a direction and a given length; determining a distance between the simulated obstacle and the simulated rotorcraft using the line of sight vector, the distance being at most equal to the given length of the line of sight vector; determining an induced airflow velocity using the distance between the simulated obstacle and the simulated rotorcraft, the aircraft airspeed and the height above ground, the induced airflow velocity being caused by a downwash recirculation flow generated by the simulated obstacle; and outputting the induced airflow velocity.

Abstract: A method for determining an attenuation of a wind caused by a simulated obstacle and experienced by a simulated vehicle in a simulation, comprising: receiving a wind direction and an initial speed for a simulated wind; generating a line of sight vector having a source position, a given direction and a given length, the given direction being one of opposite to the wind direction and identical to the wind direction; determining a distance between the simulated obstacle and the simulated vehicle using the line of sight vector, the distance being at most equal to the given length of the line of sight vector; determining a wind attenuation gain using the distance between the simulated obstacle and the simulated vehicle; determining an actual speed for the simulated wind using the initial speed of the simulated wind and the gain for the wind attenuation; and outputting the actual speed.

Abstract: Means are provided for reinforcing the assembly of facing slabs of an industrialized house. They comprise essentially a fish-plate bridging the joint formed between adjacent slabs. The slabs are provided with holes in which socket-nuts are sunk for engagement by the tightening bolts passing through holes formed in the fish-plate and provided with several radial slits forming as many blades adapted, when the bolts are tightened, in order to provide dome-shaped projections acting as punching means in the cavities. The bolt heads exert a pressure against lugs engaging with one end the flange of a post of the frame structure of the house and with the other end the fish-plate; preferably a distance-piece is provided between the lug and the blades of the corresponding hole.