A machine system, comprising: a machine having an external surface and a first shaft extending from a first side of the machine, wherein the machine is a gearbox and wherein the first shaft is an input shaft; a cooling airflow generator mounted on the first shaft and operative to generate a cooling airflow for cooling the machine; a flow guide structure in fluid communication with the cooling airflow generator and constructed to receive the cooling airflow from the cooling airflow generator and to direct the cooling airflow in a direction across the external surface; a scavenge scoop spaced apart from the flow guide structure and disposed at a second side of the machine opposite the first side, wherein the external surface is disposed between the scavenge scoop and the flow guide structure, and wherein the scavenge scoop is constructed to collect a portion of the cooling airflow generated by the cooling airflow generator and direct the portion of the cooling airflow across a portion of the second side of the machine; and a second shaft extending from the second side of the machine, wherein the second shaft is operative to rotate upon a rotation of the first shaft and wherein the second shaft is an output shaft; characterized in that the machine system further comprises: a plurality of rotating suctioning fin blades in thermal engagement with the second shaft, wherein the second shaft is operative to rotate the plurality of rotating suctioning fin blades, wherein the plurality of rotating suctioning fin blades are constructed to generate a suction pressure acting on an outlet of the scavenge scoop, and wherein the plurality of rotating suctioning fin blades are operative to extract heat from the second shaft via conduction. a machine having an external surface and a first shaft extending from a first side of the machine, wherein the machine is a gearbox and wherein the first shaft is an input shaft; a cooling airflow generator mounted on the first shaft and operative to generate a cooling airflow for cooling the machine; a flow guide structure in fluid communication with the cooling airflow generator and constructed to receive the cooling airflow from the cooling airflow generator and to direct the cooling airflow in a direction across the external surface; a scavenge scoop spaced apart from the flow guide structure and disposed at a second side of the machine opposite the first side, wherein the external surface is disposed between the scavenge scoop and the flow guide structure, and wherein the scavenge scoop is constructed to collect a portion of the cooling airflow generated by the cooling airflow generator and direct the portion of the cooling airflow across a portion of the second side of the machine; and a second shaft extending from the second side of the machine, wherein the second shaft is operative to rotate upon a rotation of the first shaft and wherein the second shaft is an output shaft; characterized in that the machine system further comprises: a plurality of rotating suctioning fin blades in thermal engagement with the second shaft, wherein the second shaft is operative to rotate the plurality of rotating suctioning fin blades, wherein the plurality of rotating suctioning fin blades are constructed to generate a suction pressure acting on an outlet of the scavenge scoop, and wherein the plurality of rotating suctioning fin blades are operative to extract heat from the second shaft via conduction.