A333 more efficient with full flaps

1

Hello everyone!
I am currently cruising at FL340 in the A333 on track A in the expert server and have noticed a bug, when I am cruising at M0.84 (GS of 497kts) I am going the same speed with full flaps but my throttle and fuel flow is lower.

no flaps:
N1:90%
fuel flow: 5030kg/hr
flaps full:
N1: 77%
fuel flow: 4430kg/hr

Has anyone else noticed this bug?

My very speculative theory

I think that IF thinks the aircraft is descending because the nose is pushed down by about 2°-2.5° and that thus IF calculates the throttle based as if the aircraft is descending even though the aircraft isn’t. This would keep the aircraft at the same speed at a lower N1%. This is just a very speculative theory though as I have absolutely no idea about how the descent physics are coded into the game.

Greetings,
Mats

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2

Same with the 747-8 … see it as a bonus future 😌

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It does look pretty weird…Shouldn’t be in a reworked aircraft.

I’ll bring this up internally, thanks!

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Yeah,
Apparently it is the same with other aircraft:

and that’s why I would think that my theory is (at least partially) correct.

Btw, do I get credit for finding/posting abt it ? :) (prob not but you can always ask lol)
Greetings,
Mats

5

That’s quite common in Infinite Flight. The A380, for example, has that problem as well.

I believe @Mathurin_Garcier said that’s because there’s no way to predict a behaviour that would never happen in real life (as the flaps would just be ripped off the wings or the FBW would just not allow it to happen).

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We should have flap limitations imo. I have voted for that already.
You can vote for it here: Maximum speed changes depending on flaps settings

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That. If RFS (and even TFS!) can have flap speed limitations, what’s stopping IF from having it as well?

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You know, If you want to reduce your fuel consumption you just have to balance your aircraft weight to the back…
You reduce the load on the front and increase it at the rear (following your ZFW if you have any) and look for the diference, you’ll be shocked

And fot my descent profil I use to do this:
If my airport is a sealevel and I have to descent from FL380 (RVSM flyng WEST), I do 38000/2000 (-2000f/m as descnt rate)
380/2 = 190NM or 19:00 from airport, that I substrack -1 or -2 minutes according the winds at my level if they’re strong or not + the aircraft groundspeed slowing down after passing FL280 when you leave the Mach speed zone = wich gave me a TOD of 18:00 when I should slowly make the aircraft descend
I keep that

Your idea of using flaps in cruise just make no sens

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Hello!
You misunderstood my message and my post :p.

My post is not a tip on how to save fuel by using full flaps (I know how to save fuel in other ways), the post is about the fact that using full flaps does save fuel. And that shouldn’t happen. That’s why it is a bug. Full flaps should add to the drag coefficient and thus require more power/N1%/throttle% to maintain the same speed. That is currently not happening.
Greetings,
Mats

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And by the way, this is almost a death threat XD

Is should be shocked, not chocked. I read this as choked, which would mean to be suffocated. And that is well, not suited for this conversation haha.

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Happens with the A380 too, funny Easter egg

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XD xd sorry for my bad english

I got you then

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Yup, it was said here before aswell haha. He beat you to the punch!

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Oop yeah I should consider reading sometimes lol

Also to test your theory, we know VNAV when unrestricted proceeds at a -2 degree angle so perhaps that could be compared to this to see?

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I’m currently flying (group flight) so I can’t test it yet. But once I have landed I will do some experimenting for sure!

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Let me know what happens, I’m interested. I’d test myself but I’m currently abroad with limited data haha

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Hello @MatsVerhoelst, long time no speak don’t you think? How’s everything? My theory with this is that the A333 with full flaps will generate lift which keeps the plane at its altitude and thus not needing that much throttle to keep it there. I understand it’s a simulator though so I guess it won’t be coded into the game (maybe it is?). Enjoy this Easter egg (sort of) and have a nice and safe landing. See you around.

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