Seat especially for aeroplanes comprising an adjustable seating plate and a seatback

Seat especially for aircraft comprising a fixed structure (1) to which are fixed an adjustable seat plate (7) and a seatback (6), characterised in that it comprises first means for controlling the movement of the seat plate (7) between:

• a first extreme position (A) adapted to passengers of a predetermined small size,
• a second extreme position (B) adapted to passengers of a predetermined tall size,
• the intermediate positions (C) between the two extreme positions (A, B) being adapted to passengers of intermediate sizes so that in any position:
• the distance (d1, d2, d3) between the seatback (6) and the front edge (7a) of the seat plate (7) corresponds to the distance between the base of the back and the hollow portion of the knee of the passengers in a seated position on the seat, said passengers having the size corresponding to one of said positions and simultaneously:
• the distance (a1, a2, a3) between the front edge (7a) of the seat plate and the floor (5) corresponds to the distance between the hollow portion of the knee and the sole of the feet of the passengers having the size corresponding to said position.