solve

(2 Parts, 12 Points per Part) Specific fuel consumption (sfc) projects the fuel economy of an engine, i.e. it measures the fuel flow rate (say in Ibm/hr) that leads to a production of a unit thrust (say 1 (bf or 1 Newton). Two sets of numbers are copied from Table 1.1 (from EJ200 specification) below: SFC (Max Power): sfCAB-off = 0.81 Ibm/hr/lbf SFC w/AB: SfCAB-on = 1.75 Ibm/hr/lbf. Thrust (SL) : TAB-off = 13500 lbf Thrust w/AB: TAB-on = 21000 lbf Note that operating the afterburner (AB) uses more than doubles the fuel consumption while boosting the thrust by only ~50%. This explains the sparse use of an afterburner on aircraft missions. To quantify, for part (a), calculate the amount of additional fuel burned in 30 minutes Without afterburner (producing TAB-off = 13500 lbf), then for comparison in part (b), calculate the amount of fuel burned With the afterburner (producing TAB-on = 21000 lbf)