To measure the drag of an upright person, without violating human subject protocols, a life sized mannequin is attached to the end of a 6 m rod and rotated at 80 rev min, as in Fig P7 77 The power required to maintain the rotation is 60 kW By including rod drag power, which is significant, estimate...

For air take 12 kgm3 and 18E5 kgm s The mannequin velocity is Vm L 80 260 rads6m 838 rads6 m 503 ...

To measure the drag of an upright person, without violating human-subject protocols, a life-sized mannequin is attached

Question:

To measure the drag of an upright person, without violating human-subject protocols, a life-sized mannequin is attached to the end of a 6-m rod and rotated at Ω = 80 rev/min, as in Fig. P7.77. The power required to maintain the rotation is 60 kW. By including rod-drag power, which is significant, estimate the drag-area CDA of the mannequin, in m2.