Fuelburn 767-400?

[pharmair]

The title says it all - what's a ballpark average burn to be used for a 767-400?

[763 jock]

On what mission?

[NutLoose]

This might help, See

http://www.boeing.com/commercial/airports/acaps/767sec3.pdf

for more

Boeing: Commercial Airplanes - 767 - Technical Information (http://www.boeing.com/commercial/767family/specs.html)

and the rest of the range see

Boeing: Commercial Airplanes - Products (http://www.boeing.com/commercial/products.html)

[pharmair]

I guess I'm looking for an average burn on long stages - what do you guys use as a figure for mental calculation? On the 737NG 5000 lbs/hr is a good figure to use...
I know the weight variation in a bigger airplane will be bigger, and therefor also the fuelburn.

Basically, I'd like to get an idea about how much more expensive it would be to operate a 76-400 than a BBJ1 in, let's say, a corporate configuration...;)

[OverRun]

Long range mission, 88.3 kg per minute. 2.5 hour hop 88.7 kg per minute.

[enicalyth]

Okay here goes... Planning exercise

First Line ... no explanation
CI tbc Declared MN 0.80 FL370 NW NT

Second Line: the columns are in order a) leg distance b) cumulative distance c) distance counting backwards! d) all up weight e) well, burnt I s'pose f) percentage of trip burnt g) fuel on board.

a) DISTnm b) CUMnm c) REMnm d) WTkg e) BURNTkg f) %age g) FOB kg

a) b) c) d) e) f) g)
0 0 1927 191131 0 0.00% 27982
5 5 1922 190135 996 4.67% 26986
8 13 1914 189735 1396 6.55% 26586
13 26 1901 189290 1841 8.64% 26141
14 40 1887 188660 2471 11.59% 25511
9 49 1878 188400 2731 12.81% 25251
9 58 1869 188176 2955 13.87% 25027
46 104 1823 187413 3718 17.45% 24264
2 106 1821 187313 3818 17.91% 24164
51 157 1770 186792 4339 20.36% 23643
24 181 1746 186540 4591 21.54% 23391
25 206 1721 186295 4836 22.69% 23146
152 358 1569 184706 6425 30.15% 21557
17 375 1552 184530 6601 30.97% 21381
92 467 1460 183582 7549 35.42% 20433
10 477 1450 183479 7652 35.90% 20330
25 502 1425 183222 7909 37.11% 20073
68 570 1357 182537 8594 40.32% 19388
19 589 1338 182371 8760 41.10% 19222
55 644 1283 181768 9363 43.93% 18619
23 667 1260 181532 9599 45.04% 18383
59 726 1201 180936 10195 47.84% 17787
6 732 1195 180872 10259 48.14% 17723
86 818 1109 180003 11128 52.21% 16854
33 851 1076 179673 11458 53.76% 16524
23 874 1053 179440 11691 54.86% 16291
77 951 976 178665 12466 58.49% 15516
24 975 952 178422 12709 59.63% 15273
83 1058 869 177602 13529 63.48% 14453
84 1142 785 176769 14362 67.39% 13620
92 1234 693 175858 15273 71.66% 12709
14 1248 679 175721 15410 72.31% 12572
14 1262 665 175585 15546 72.94% 12436
40 1302 625 175195 15936 74.77% 12046
71 1373 554 174514 16617 77.97% 11365
86 1459 468 173668 17463 81.94% 10519
41 1500 427 173269 17862 83.81% 10120
81 1581 346 172609 18522 86.91% 9460
12 1593 334 172539 18592 87.24% 9390
6 1599 328 172478 18653 87.52% 9329
31 1630 297 172221 18910 88.73% 9072
40 1670 257 171918 19213 90.15% 8769
18 1688 239 171806 19325 90.68% 8657
23 1711 216 171603 19528 91.63% 8454
43 1754 173 171231 19900 93.37% 8082
50 1804 123 170851 20280 95.16% 7702
45 1849 78 170671 20460 96.00% 7522
52 1901 26 170398 20733 97.28% 7249
5 1906 21 170377 20754 97.38% 7228
5 1911 16 170332 20799 97.59% 7183
6 1917 10 170253 20878 97.96% 7104
5 1922 5 170049 21082 98.92% 6900
5 1927 0 169819 21312 100.00% 6670

FF did not print so you'll have to do sums!! But the total burnt is (27982-6670) = 21312kg averaged over 4.6hrs for 4633kg/hr or 90.4nm/tonne average (that good huh!)

Oh well as an average with alll sorts of caveats I hope it helps.

Best Rgds

The "E"

[pharmair]

Thanks guys!:ok:

[flyr767]

what do you guys use as a figure for mental calculation?

I just pull out the old fuel burn table and look at it. Takes nothing but a few moments and beats the headache of trying to work numbers in your head.