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. <EOS>