Aces High Bulletin Board

Help and Support Forums => Help and Training => Topic started by: Max on May 03, 2020, 08:26:55 AM

Title: Fuel tanks; Internal & External use priority
Post by: Max on May 03, 2020, 08:26:55 AM
Is there info available related to the priority of fuel tank usage for the various in-game aircraft? Thanks
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 03, 2020, 10:12:51 AM
The fuel gauge tells you the fuel use priority.

If you mean the alleged benefits of manual fuel control I'm not aware of any charts for all the aircraft.

I'd suggest testing to verify any claims of superior handling.

I've never seen any data or video evidence comparing the differences.
Title: Re: Fuel tanks; Internal & External use priority
Post by: morfiend on May 03, 2020, 03:30:55 PM
Max,

  Not sure if this is what you're looking for but some A/C pay a price in drag if you use a DT and others dont. The racks are always there on most US planes so you dont have a drag penalty if you add a DT,well the DT adds drag but once you drop it then there's no drag. If that makes sense.

 Most the German planes needed a rack to carry a DT so even after you jettison the tank you still have a drag penalty from the rack. IIRC only the TA152 has the rack as standard so you are best off not loading a DT to a German plane unless you really need it.


 Hope that helps.


   :salute
Title: Re: Fuel tanks; Internal & External use priority
Post by: 1stpar3 on May 03, 2020, 04:42:53 PM
Its the same with Rockets and Bombs on some planes too? I have heard it talked about, but dont know for sure. The "Added Drag" Penalty :uhoh
Title: Re: Fuel tanks; Internal & External use priority
Post by: Max on May 03, 2020, 05:13:43 PM
 I’m not speaking so much in terms of drag, but should I manually change the default usage. I’ve heard it’s best to use  top tank first in a Spitfire and the bottom tank comes up first by default. I believe the FW 190s also want to be swapped out in terms of default, yes? Any other situations concerning fuel usage I should be aware of?
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 03, 2020, 06:25:58 PM
How does the top or bottom tank change the center of gravity with respect to the center of lift?

I think you should try both aircraft both ways and let me know if you notice a difference.   :aok
Title: Re: Fuel tanks; Internal & External use priority
Post by: TryHard on May 07, 2020, 06:39:20 PM
I like to drain the left wing tank in the F4U-1D first and leave the right tank full until the main tank is empty to help with the torque roll in turn fights.

other than that the automatic control works pretty well, for instance the P51 is known to handle quite poorly with the AUX tank full of fuel and this is what the automatic system uses first.
Title: Re: Fuel tanks; Internal & External use priority
Post by: Arlo on May 07, 2020, 07:01:11 PM
I like to drain the left wing tank in the F4U-1D first and leave the right tank full until the main tank is empty to help with the torque roll in turn fights.

other than that the automatic control works pretty well, for instance the P51 is known to handle quite poorly with the AUX tank full of fuel and this is what the automatic system uses first.

F4U-1A.  :D  :cheers:
Title: Re: Fuel tanks; Internal & External use priority
Post by: Max on May 07, 2020, 07:50:59 PM
I like to drain the left wing tank in the F4U-1D first and leave the right tank full until the main tank is empty to help with the torque roll in turn fights.

other than that the automatic control works pretty well, for instance the P51 is known to handle quite poorly with the AUX tank full of fuel and this is what the automatic system uses first.

Good info, thanks :salute
Title: Re: Fuel tanks; Internal & External use priority
Post by: SIK1 on May 07, 2020, 10:42:26 PM
F4U-1A.  :D  :cheers:

Arlo is correct, it's the F4U-1A (and birdcage corsair) that have internal wing fuel tanks. The F4U-1D only has the one main internal fuel tank. 
Burning the left wing tank in the corsair is suppose to improve the roll rate when you are full of fuel. I can't say if it does or not because I have been doing it for as long as I can remember, and have nothing to judge not doing it against.

For the most part the automatic system works well. One thing you can do is research the individual planes you enjoy flying and see what the actual pilots manual has to say. http://www.zenoswarbirdvideos.com/ can be a great source for WWII training films

 :salute
Sik
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 08, 2020, 09:10:09 AM
I like to drain the left wing tank in the F4U-1D first and leave the right tank full until the main tank is empty to help with the torque roll in turn fights.
...

You roll in a turn fight when you stall one wing first, generally from adverse yaw. The correction for adverse yaw is with the rudder. 



Title: Re: Fuel tanks; Internal & External use priority
Post by: LCADolby on May 08, 2020, 02:21:08 PM
How does the top or bottom tank change the center of gravity with respect to the center of lift?

I think you should try both aircraft both ways and let me know if you notice a difference.   :aok

Spitfires have very odd stall characteristics if draining the bottom first. They almost become as coookey as a P39 to fly.
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 08, 2020, 08:26:45 PM
Could you be more specific? Curious about the details.
Title: Re: Fuel tanks; Internal & External use priority
Post by: RichardDarkwood on May 11, 2020, 05:54:53 AM
I’m not speaking so much in terms of drag, but should I manually change the default usage. I’ve heard it’s best to use  top tank first in a Spitfire and the bottom tank comes up first by default. I believe the FW 190s also want to be swapped out in terms of default, yes? Any other situations concerning fuel usage I should be aware of?

The forward tank in the 190 is burned first
Aileron tanks on the 38 are burned first
Title: Re: Fuel tanks; Internal & External use priority
Post by: LCADolby on May 11, 2020, 08:06:07 AM
In the 190 The AFTer should be drained first, in F then the MIDdle. Draining the ForWarD tank first like the Spit's TOP tank causes oddities in handling especially on the knife edge.
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 11, 2020, 09:07:02 AM
As a general rule you probably want the fuel tank closest to the CG to drain last.
Title: Re: Fuel tanks; Internal & External use priority
Post by: Puma44 on May 11, 2020, 01:17:08 PM
In the 190 The AFTer should be drained first, in F then the MIDdle. Draining the ForWarD tank first like the Spit's TOP tank causes oddities in handling especially on the knife edge.

Does HiTech have all of this included in the flight models for the various in game planes?
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 11, 2020, 06:57:24 PM
Yes. It's obvious in the P-51 if you don't drain the aux tank first.
Title: Re: Fuel tanks; Internal & External use priority
Post by: Puma44 on May 11, 2020, 08:47:08 PM
Yes. It's obvious in the P-51 if you don't drain the aux tank first.

How about the rest?  Perhaps HiTech could answer and clarify for across the board. 
Title: Re: Fuel tanks; Internal & External use priority
Post by: TequilaChaser on May 12, 2020, 06:37:12 AM
I like to drain the left wing tank in the F4U-1D first and leave the right tank full until the main tank is empty to help with the torque roll in turn fights.

other than that the automatic control works pretty well, for instance the P51 is known to handle quite poorly with the AUX tank full of fuel and this is what the automatic system uses first.

You really wouldn't want your main tank empty in the F4U-1 or F4U-1A (the only 2 F4Us with wing tanks) because you barely have enough time for a good turn fight, let alone time to land.....

Ideally, in the -1 & -1A, one would drain their left wing tank down to 1/16th and then drain the right tank down to 1/4 full then switch to the main tank... This helps with roll-rate in both directions and one does not have to crack the throttle as much in a right hand turn as much as they would if the right wing tank was full.....since the F4U-1 & -1A turn better turning left....cracking the throttle to 95% to 90% while turning right compensates for the torque and allows the hog to turn better...

Hope this helps

TC
Title: Re: Fuel tanks; Internal & External use priority
Post by: Gooss on May 21, 2020, 04:45:01 PM
I think the zeno's film mentions that the F4U wing tanks should be burned first because they were not connected to the fuel gauge.
Title: Re: Fuel tanks; Internal & External use priority
Post by: Owlblink on May 25, 2020, 02:29:30 AM
I've heard this tail or that tail over the years about fuel tanks, some I've tried and some I have not. I do not discount that there is a difference in specific cases but I wonder if some claims come from superstitious reasoning.

@FLS - Out of the planes you are familiar with the most, do YOU have any preferences in fuel burning order? :devil

I do believe the P51 claim on burning the AUX first, which I recall the fuel auto selection doing so last I played.

  :salute
Title: Re: Fuel tanks; Internal & External use priority
Post by: FLS on May 25, 2020, 05:50:08 AM
I think in general for handling considerations the fuel tank closest to the CG should burn last but it also makes sense to have some fuel in more than one tank in case you get a leak.

I also think you should verify any benefit for yourself by flight testing so you know the specific effect if any is noticeable.
Title: Re: Fuel tanks; Internal & External use priority
Post by: diaster on February 01, 2021, 08:03:13 AM
You roll in a turn fight when you stall one wing first, generally from adverse yaw. The correction for adverse yaw is with the rudder.
I thought it was a reduction of lift with aileron up vs increase of lift with aileron down, with the rudder input to keep the turn coordinated, it is adverse when you fail to use the rudder creating a skidding turn which raises the stall When a plane “stalls” loses all lift, it will drop the same wing it drops in level flight. As an example a crop duster was doing a hard right climbing turn when it stalled, the left wing dropped and it went down in a left spiraling turn.
It seems to me that if a wing was heavier it would take less deflection of the ailerons to reduce lift on that wing, lift force perpendicular to the motion of the wing, which is greater than the downwards gravitational force on the wing and so keeps the aircraft airborne. I could be wrong I reckon, but it seems to make sense, the heavier a wing is the less disruption of the airflow, (increasing drag) it would take “stall it” as you put it. Although when you lose half a wing in game, you either have to go fast with right aileron and rudder input to correct for the drop of the wing with less lift, reducing lift on the good wing as it were, but to land you have to slow down and go full flaps to maintain control and if the broken wing (Less lift) is on the torque side it’s chop the power and all the opposite rudder you have to keep it level. If on the opposite side, I add power using torque roll to bring that wing up. A way to test this in game is to drain a tank one one side, reduce thrust to zero and see if said aircraft rolls off the same way it would with full fuel.
Title: Re: Fuel tanks; Internal & External use priority
Post by: Mongoose on February 02, 2021, 08:15:55 PM
By default, the fuel burn switches between tanks to keep the plane in balance.  In some planes you can get better performance by burning fuel from specific tanks.  The P-51D, for example, has an auxiliary fuel tank located behind the pilot.  According to the manual, this tank needs to be drained first, or it makes the plane hard to handle. 

Go to this page:
https://www.hitechcreations.com/support/game-faq
and scroll down to where it says "What does the 'A' in the fuel indicator mean?"

This gives a good description of how the automatic fuel burn works in game.