Control unit (46, 46') for an aircraft (1, 1') capable of hovering or for a flight simulation system of said aircraft (1, 1'), said control unit (46, 46') being programmed to: - receive at input at least one datum associated with equipment and/or kits actually or simulatedly installed on said aircraft (1, 1') and/or with the operating configuration of said equipment and/or kits; the installation and/or the configuration of said equipment and/or kits causing, in use, a reduction in the maximum actual or simulated forward velocity of said aircraft (1, 1'); - store a table defining a correspondence between each said data and a respective value of a first signal (Vmax, Vmax') associated with a value of maximum actual or simulated forward velocity of said aircraft (1, 1'); - display the lowest of said first signals (Vmax, Vmax'); said control unit (46, 46') comprising: - a processing stage (48, 48') programmed to acquire at input said plurality of data; - a first storage stage (47, 47') wherein said table is stored and operationally connected to said processing stage (48, 48'); and - a display stage (50, 51; 50', 51') programmed to command the display of said first signal (Vmax, Vmax') and commanded by said second storage stage (47, 47'); characterized in that it comprises a second storage stage (44, 44') programmed to store a file containing said equipment and/or kits which are nominally installable in an actual or simulated manner on said aircraft (1, 1'); and in that it comprises an interface (40, 40') that is used to declare that some of said equipment and/or kits are absent; said second storage stage (44, 44') being operatively connected with said interface (40, 40'). - receive at input at least one datum associated with equipment and/or kits actually or simulatedly installed on said aircraft (1, 1') and/or with the operating configuration of said equipment and/or kits; the installation and/or the configuration of said equipment and/or kits causing, in use, a reduction in the maximum actual or simulated forward velocity of said aircraft (1, 1'); - store a table defining a correspondence between each said data and a respective value of a first signal (Vmax, Vmax') associated with a value of maximum actual or simulated forward velocity of said aircraft (1, 1'); - display the lowest of said first signals (Vmax, Vmax'); said control unit (46, 46') comprising: - a processing stage (48, 48') programmed to acquire at input said plurality of data; - a first storage stage (47, 47') wherein said table is stored and operationally connected to said processing stage (48, 48'); and - a display stage (50, 51; 50', 51') programmed to command the display of said first signal (Vmax, Vmax') and commanded by said second storage stage (47, 47'); - a processing stage (48, 48') programmed to acquire at input said plurality of data; - a first storage stage (47, 47') wherein said table is stored and operationally connected to said processing stage (48, 48'); and - a display stage (50, 51; 50', 51') programmed to command the display of said first signal (Vmax, Vmax') and commanded by said second storage stage (47, 47'); characterized in that it comprises a second storage stage (44, 44') programmed to store a file containing said equipment and/or kits which are nominally installable in an actual or simulated manner on said aircraft (1, 1'); and in that it comprises an interface (40, 40') that is used to declare that some of said equipment and/or kits are absent; said second storage stage (44, 44') being operatively connected with said interface (40, 40').