TM 1-1510-225-10 7-68 NORMAL CRUISE POWER 1800 RPM ISA + 30 °C NOTES: IOAT, TORQUE, AND FUEL FLOW BASED ON 12,000 POUNDS. TO OBTAIN FUEL FLOW PER ENGINE, DIVIDE  THE TOTAL FUEL FLOW VALUE FOR THE CORRESPONDING ALTITUDE BY TWO. AIRSPEED ~ KNOTS PRESSURE ALT IOAT    OAT TORQUE PER ENGINE TOTAL FUEL FLOW 13,000 LB 12,000 LB 11,000 LB 10,000 LB FEET ° C ° C FT-LB % LB/HR IAS TAS IAS TAS IAS TAS IAS TAS SL 51 45 2230 100 1000 235 249 237 250 237 251 238 251 2000 47 41 2230 100 972 233 253 234 254 235 255 236 256 4000 43 37 2230 100 944 231 258 232 259 233 261 234 262 6000 40 33 2230 100 916 228 263 229 264 230 265 231 267 8000 36 29 2141 96 868 222 264 224 266 225 267 226 268 10,000 32 25 2052 92 818 216 265 218 267 219 269 220 270 12,000 28 21 1962 88 766 209 265 211 267 213 269 214 271 14,000 24 17 1873 84 724 203 265 205 268 207 270 208 272 16,000 20 13 1806 81 686 197 266 199 269 201 271 203 273 18,000 16 9 1717 77 652 191 267 194 270 196 273 197 275 20,000 12 5 1673 75 626 186 269 189 272 191 275 193 278 22,000 8 1 1628 73 602 181 270 184 274 186 277 188 281 24,000 4 -3 1516 68 560 172 266 175 271 178 275 181 279 26,000 0 -7 1405 63 516 161 259 166 266 170 272 173 276 28,000 -4 -11 1293 58 474 148 247 156 259 160 266 164 272 29,000 -7 -12 1227 55 454 140 237 149 252 155 263 159 270 31,000 -12 -16 1115 50 414 – – – – – – 134 236 144 253 150 263 33,000 -16 -20 1004 45 384 – – – – – –     – – –     – – – 128 235 139 253 35,000 -20 -24 914 41 352 – – – – – –     – – –     – – –     – – – – – – 123 234 Figure 7-64.  Normal Cruise Power, 1800 RPM, ISA + 30 °C