Abstract: A method for determining a predictive model of a pressure ratio P1/P2 for a bypass turbomachine of previously defined type including primary and secondary air paths separated by an inter-path compartment, the P1 pressure corresponding to an air pressure inside the inter-path compartment, the P2 pressure corresponding to an air pressure in the secondary air path. The method includes acquiring, on a test turbomachine in operation, at respective measurement times, sets of measurements each including a P1 measurement, a P2 measurement, a measurement M of a Mach number of the test turbomachine, and a PCN12R measurement representing a low pressure rating, obtaining the sets of measurements by a processing device, supervised learning, by the processing device and on the basis of the sets of measurements obtained, of a predictive model of the ratio P1/P2 as a function of the M number and of the PCN12R rating considered as explanatory variables.

Abstract: A plough frame designed to be hitched to a tractor and comprising at least one body which has a plough board and a single ploughshare for both the right and left ploughing directions, said frame consisting of a coupler head (1), hinged elements which swing relative to said head and include: a body support beam (5) provided with body support pivots (19), at least one bracket element (6) swiveling both around a point (3) with the head (1) and around a point (8) with the body support beam (5) so that this beam can pass either side of a line running through said points (3 and 8), and at least one activating device (16) for moving the body support beam (5) and allowing different ploughing widths to be achieved.