A set of turbines, comprising: a first turbine comprising: a first case , a first shaft supported in the first case , first support elements radially interposed between the first shaft and the first case and configured to enable free rotation of said first shaft with respect to the first case about a first main axis (X1), and a first rotor provided with first rotor blades (P1) and joined to a distal end of the first shaft , wherein said first rotor is supported in an overhung manner with respect to the first support elements , wherein said first rotor has a first front face facing the opposite side with respect to the first support elements ; a second turbine comprising: a second case , a second shaft supported in the second case , second support elements radially interposed between the second shaft and the second case and configured to enable free rotation of said second shaft with respect to the second case about a second main axis (X2), and a second rotor provided with second rotor blades (P2) and joined to a distal end of the second shaft , wherein said second rotor is supported in an overhung manner with respect to the second support elements , wherein said second rotor has a second front face facing the opposite side with respect to the second support elements ; wherein the first front face faces the second front face and the first main axis (X1) is substantially aligned with the second main axis (X2); wherein the set of turbines further comprises a connection element connected to the first front face and to the second front face to transmit rotation from the first shaft to the second shaft or vice versa; wherein said connection element comprises at least one elastic joint configured to minimize the rotordynamic influence of the first turbine and the second turbine on each other. a first turbine comprising: a first case , a first shaft supported in the first case , first support elements radially interposed between the first shaft and the first case and configured to enable free rotation of said first shaft with respect to the first case about a first main axis (X1), and a first rotor provided with first rotor blades (P1) and joined to a distal end of the first shaft , wherein said first rotor is supported in an overhung manner with respect to the first support elements , wherein said first rotor has a first front face facing the opposite side with respect to the first support elements ; a second turbine comprising: a second case , a second shaft supported in the second case , second support elements radially interposed between the second shaft and the second case and configured to enable free rotation of said second shaft with respect to the second case about a second main axis (X2), and a second rotor provided with second rotor blades (P2) and joined to a distal end of the second shaft , wherein said second rotor is supported in an overhung manner with respect to the second support elements , wherein said second rotor has a second front face facing the opposite side with respect to the second support elements ; wherein the first front face faces the second front face and the first main axis (X1) is substantially aligned with the second main axis (X2); wherein the set of turbines further comprises a connection element connected to the first front face and to the second front face to transmit rotation from the first shaft to the second shaft or vice versa; wherein said connection element comprises at least one elastic joint configured to minimize the rotordynamic influence of the first turbine and the second turbine on each other. <EOS>