B738 average burn
I would like to ask any 737-800 guys out there what the average burn pr. hr. is on an average 3-4 hr. sector. I remember from my 737 classic days that is would burn 2,2-2,4 tons pr. hr.
tks. o/c |
from QRH
long range cruise control: p. PI.11.2
weight 65,000 kg FL 370 FF/ENG=1231 KG/HR FL 350 FF/ENG=1218 FL 330 FF/ENG=1239 FL 310 FF/ENG=1252 so multipy by two (if both engs working) another QRH chart gives: air distance: let's use 1000 NM FL 310=4600KG FL330=4400KG FL350=4300KG FL370=4200KG for "shooting from the hip" estimates-some use 40KG minute for hold, some use 50kg minute. another rough guide=200KG per hour each 1000 feet below flight plan level. i am sure you will get quite a range of differences. |
thanks stator vane, appreciate it
|
Average of 41 kilos per minute from takeoff to landing works out pretty well too.
|
is there a difference between winglets and without winglets ones? How much?
|
Originally Posted by alexban
(Post 2833643)
is there a difference between winglets and without winglets ones? How much?
|
with winglets
Same Weight=65,000 KG LONG RANGE CRUISE
FL 370=1162 FL 350=1166 Kg/hr/eng FL 330=1180 FL 290=1186 1000NM FL 310=4900 FL 330=4700 FL 350=4600 FL 370=4500 did a double check for the 1000NM and that is what the book shows. fuel higher for the winglets but the times are shorter! without winglets 1000 nm FL 290=4700KG 2:45 FL 310=4600KG 2:42 FL 330=4400KG 2:37 FL 350=4300KG 2:32 with winglets 1000 nm FL 290=5100KG 2:38 FL 310=4900KG 2:33 FL 330=4700KG 2:28 FL 350=4600KG 2:24 i must admit that i get bored very quickly doing these type of activities. perhaps later i will look into the subject further. but that is what the QRH book gives for the winglets and wingletless aircraft at ryanair. anyhow, with a new flight crew notice that requires us to maintain at least a 1.45G manuever margin, we are always at least 2000 feet lower than usual. so the fuel savings forecast by the winglet sales department is seldom approached. but regardless of fuel factors-- they do look good and we all know how important good looks are! |
All times are GMT. The time now is 08:46. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.