777LR 777ER Fuel issues

can someone please tell me why the fuel is not accuarate on these two plane models. The max fuel on these planes is around 18 hours why does it only last for 12 hours??

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Trim… keep the trim even, the pink gage. Keep it in the middle. I have flown 18 hours on both planes!

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Two things:

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What do you mean by that?

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It depends a lot on how you fly the aircraft. If you climb to fast, go to high to start with, don’t trim correctly etc then your range is greatly reduced. Also if you take off with full weight for the first few hours you will have a higher fuel consumption until the weight is reduced.

Suggest that you use simbrief and follow their speed, and step climbs as that is pretty accurate.

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It says i have 88% fuel left but only giving me 10 hours of flight time. When i lower my altitude the time goes up but as soon as I’m cruising it goes back down to 10 hours

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Trim… during flight make sure the pink gage is gone for maximum range and less fuel burn. Add more or less to make it disappear during flight. The more it’s gone the better fuel burn which equals extended range!

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So idk why i just switch my crushing altitude from FL320 to 28000 and my fuel when up a lot

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So I just went to a lower altitude and the fuel time went up why is this?

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Ok, what is your FL?

As you continue in the cruise and burn more fuel, your aircraft will get lighter and so your range will in crease as you don’t need to burn so much fuel to go at a certain speed.

Like a lot of things it’s all about the planning, so using a good flight planning tool such as simbrief.com and following the route, speed and heights at certain waypoints mean that you will have the range.

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I also for some reason set my flaps at 15 and then the fuel range goes up a lot

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When i set the flaps at 15 which doesn’t makes sense the fuel range goes up

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As you changed Altitude your speed would have reduced and so your range increased. Once settled at new height the throttle increases and so your range will increase. Same if you climb to a higher level, first your range will decrease as you need more speed to get to the new height. Once reached then the throttle will reduce and your range increases again.

What speed you flying at? Normally use M0.82 for the B777 family.

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@mo_hecht… I have flown from Miami to Hong Kong… a lil over 18 hours, Auckland to Doha… a lil over 17 hours, New Jersey to Singapore… about 18 hours. All in 777-300ER’s at about FL350 to FL380, all weight heavy. I made it all with fuel remaining cause I kept the trim even during flight. @David_Lockwood is correct: as the plane flies it gets lighter so the trim has to be adjusted. By doing so it will increase the range and burn less fuel!

Another example: Dubai to LAX in the MD-11. It says it can only fly for 12 hours but I easily made the 15 1/2 flight with the steps below👇🏼

I think that’s what you have to do!

  1. make your you have enough fuel
  2. montier the trim and keep it even
  3. don’t speed… keep cruising speed around M.82
  4. flaps up fully during cruising
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Have a read and search through the Tutorials, much easier then trying to explain as you have lot of basic issues to work out.

https://community.infiniteflight.com/c/tutorials

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So I’m currently flying at FL 280

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I’ve been flying for so long never had an issue until now m. What does keeping the trim even because I’ve never really used the trim

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@mo_hecht Look at the picture👇🏼 see that “pink gage” in the same box as the trim to the right of the %’s. During cruise make sure the pink gage is gone for maximum range by adding more trim or less trim at cruising altitude. When it has disappeared… the plane will burn less fuel, which means you travel at higher altitudes. Also it will increase range or stay in the air longer. Your going to have to use the trim if you want better fuel consumption and longer range.

You understand now?

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@David_Lockwood and @LaroseRoyce just to point out that the 777 cruises at M0.84 if you want to be realistic

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ok… I said “around M.82”

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