TM 55-1510-222-10 NOTE For  flight  planning,  enter  the  Cruise Power  graphs  at  the  forecasted  ISA condition; for enroute power settings,    enter    the    graphs    at    the actual IFAT. c. Cruise  Fuel  Flow.    Enter  the  FUEL  FLOW  AT NORMAL   CRUISE   POWER   AT   1500   RPM   graph   at 25,000 feet, and read the fuel flow for ISA -6°C  (-34°C IFAT) and ISA + 5°C (-24°C IFAT): ISA -6°C (-34°C IFAT) Fuel Flow Per Engine................................ 400 lbs/hr Total Fuel Flow ......................................... 800 lbs/hr ISA + 5°C (-24°C IFAT) Fuel Flow Per Engine................................ 370 lbs/hr Total Fuel Flow ......................................... 740 lbs/hr Time  and  Fuel  Used  were  calculated  at  Normal  Cruise Power AT 1500 RPM as follows: Time = Distance + Ground Speed Fuel Used = (Time) (Total Fuel Flow) (7)   Flight    Planning    Results.        Refer    to    the EXAMPLE CRUISE RESULTS table for an illustration of the flight planning procedure. NOTE For   flight   planning,   enter   the   Fuel Flow   graphs   at   the   forecasted   ISA condition; for enroute fuel flow, enter the graphs at the actual IFAT. Refer  to  the  example  TIME  -  FUEL  -  DISTANCE  table for an illustration of the total flight planning results. EXAMPLE CRUISE TRUE AIRSPEEDS ALT FEET 16,000 POUNDS 14,000 POUNDS ISA - 10°C ISA ISA + 10°C ISA - 10°C ISA ISA- +10°C 24,000 261 253 243 267 261 253 25,000 258.5 250.5 239.5 265 259 250.5 26,000 256 248 236 263 257 248 EXAMPLE CRUISE RESULTS ESTIMATED ²TIME AT ³FUEL ROUTE GROUND CRUISE USED FOR SEGMENT ¹DISTANCE SPEED ALTITUDE CRUISE NM KNOTS MIN LBS BIL-SHH 43 277 90.3 124.19 SHR-CLI 57 318 10.8 143.40 CLI-CPH 5 282 1.1 13.12 TOTAL 105 --- 21.2 280.71 ¹Distance required to climb or descend has been subtracted from segment distance. ²Time = Distance divided by Ground Speed. ³Fuel Used = Distance divided by Ground Speed, multiplied by Total Fuel Flow. EXAMPLE- FUEL - DISTANCE TIME FUEL DISTANCE ITEM MIN POUNDS NM Start, Runup, Taxi, and Takeoff Acceleration 0.0 110 0 Climb 16.9 280 48 Cruise 21.2 281 105 Descent 12.6 163 63 TOTAL 50.7 834 216 Block Speed 216 NM 9 50.7 minutes = 256 knots 7-9