Why is my aircraft pitching up while cruising? From EGLL-YPPH

omg this always happens to me i was always woundering why my aircart did this from NZAA - YSSY or OMBD - LGAV haha but um no that i have read the comments of thistopic i understand that this is a normal thing to happen, i have also noticed that on the A380 the nose sometimes pitched down at crusing altiude now this is annoying ha idk if this is becuase of the wind at the time pushing behind creating up lift rare push or what but it makes the fight look bad hahah

Having your nose pitch down is not normal, it may be because you are too fast.

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747-8 will do it on IF but use 10% flaps and it straightens up and has no issues.

Just going to reiterate that trim does nothing while the AP is controlling altitude. You can try it yourself, go to +100 and then -100, once it settles there will be no difference.

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This is perfectly normal, you can adjust your trim if you really want to, but it’s not going to make a difference in your flights performance.

You would notice a difference for awhile. While your plane in violently trying to correct its self.

So you’re agreeing that once the aircraft settles it makes no difference. That doesn’t take awhile to happen, maybe a minute tops

The 787 actually cruises like that in real life so nothing to be alarmed about. The lighter you get the plane will level out a bit more but it won’t go completely flat.

Adding on that’s why their engines have like a -5° angle to make them more efficient:)

No, using the proper trim, just makes you fuel efficient, from what i’ve found out flying

Trim has no affect on your fuel burn or efficiency, you can go to any trim setting and you’ll have the same range/endurance

Trim, while it may not seem like it makes much of a difference, can improve the range of an aircraft, especially on longer flights.

Ultimately, it reduces the control pressure of keeping the aircraft in level flight which will help keep an efficient fuel burn. I usually trim until the pink line goes away and adjust during different phases of the flight. This works very well for me!

@Josh_Suarez Sorry but you’d be wrong. I have this problem in every plane I fly in IF except for the 757 and CRJ and ERJ families. Adding flaps is the only way to fix this problem in IF. Trim doesnt do much other decrease fuel efficiency. This problem is perfectly normal @David_A . Just use flaps 20

That’s not correct actually- I only do flights that are 17-20 hours long and I’ve experimented thouroughly with ways to improve performance. Trim has no affect on your range or endurance. You can go to +100 or -100 or anything in between and you’ll end up with the same fuel flow.

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Point 2 and point 5

I’ve already gone over this with Deercrusher since he made that tutorial. I asked him to experiment with different trim settings and his fuel flow didn’t change. I’m not sure why those are still on there.

You’d be right but the problem is that you’re just gonna waste more fuel in cruise if you use flaps to fix something that’s just aesthetically unpleasant. The use of flaps enroute is prohibited in most airlines and that is very common for most airlines because using flaps does increase your fuel burn for any airplane you fly. Flaps should only be used for takeoff, approach and landing and in some cases when needed to preflight or de-ice on the ground

Thank you! At Least someone apart from me has noticed this.

Trim in IF has a primary use of just making manual handling easier when your calibration is messed up. It will NOT increase your fuel efficiency because the "trim in IF will set the vertical stabilizer to a position (when no pink line is visible) that the stabilizer would be in if the trim were 0."

In simple words, the aerodynamics don’t change with the use of trim (in IF).

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You can try to set more cargo weight in your forward hold compared to your aft hold. It’s what I do. (Typically a difference of 2000-4000 lbs)

In IF you can probably get away with it, but I’m the real world you would get structural damage and possibly loose control if you were to extend flaps in cruise.

In the real world, being out of trim would increase fuel burn. Doesn’t sound like this is modeled in IF, though.

It is normal for a passenger jet to cruise with a 3-4 degree nose up attitude. More than that would mean you are too high for your current weight (or possibly cruising too slow. In the flight levels you should cruise at Mach .78 - .85 depending on type)

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