For example, if the intake aperture 111 is obstructed, the same fan 210 rotates at {HEAD ~ about 8,000 rpm} with a flow rate of about 107 cfm and rotates at about 10,000 rpm with a flow rate of {TAIL ~ about 26 cfm} 
For example , if the intake aperture 111 is obstructed , the same fan 210 rotates at { HEAD ~ about 8,000 rpm } with a flow rate of about 107 cfm and rotates at about 10,000 rpm with a flow rate of { TAIL ~ about 26 cfm }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL