1 hour ago, Watsi said:

And: at least in experimental (I believe in dev too) we did some work on the flx temp settings recently. It's still not perfect but it is getting there.

Would it be feasible to include an option to do this calculation in the EFB?

Edited February 17, 20224 yr by hvw

28 minutes ago, hvw said:

Would it be feasible to include an option to do this calculation in the EFB?

We are working on it. The problem is the numbers. A320Neo is low on numbers (you can get officially). That's why there's no other FLX calculator for Neos out there.

Edited February 17, 20224 yr by Watsi

EasyJetSimPilot has released his flex temp app:-

Validated against the real world app.

 

 

cool, be even better if there was a link.  I could not find this on a web search using 'simsmart per calculator'.  seems like a nice product though.  I could not find the link in the video either.

www.simsmart.uk

6 minutes ago, Mike S KPDX said:

cool, be even better if there was a link.  I could not find this on a web search using 'simsmart per calculator'.  seems like a nice product though.  I could not find the link in the video either.

Links in the video description:-

www.simsmart.uk

 

 

Thanks.

This will be precious as soon as FBW team will integrate the performance as effective.

 

4 hours ago, Drebin27 said:

Links in the video description:-

www.simsmart.uk

 

 

don't mean to be pedantic, but this is the video description which does not contain a link (unless I am reading incorrectly);

"SimSmart is the new Airbus A320 Neo take-off performance calculator for use in MSFS 2020 (& any other A320 Neo flight simulator). The app is based on Airbus' real world A320 performance calculator, FlySmart. This new Takeoff Performance / Flex Temp calculator for the Airbus A320 Neo"

Just now, Mike S KPDX said:

don't mean to be pedantic, but this is the video description which does not contain a link (unless I am reading incorrectly);

"SimSmart is the new Airbus A320 Neo take-off performance calculator for use in MSFS 2020 (& any other A320 Neo flight simulator). The app is based on Airbus' real world A320 performance calculator, FlySmart. This new Takeoff Performance / Flex Temp calculator for the Airbus A320 Neo"

You need to click on "see more" in the description:

BUY NOW:- www.simsmart.uk
SimSmart Discord Support:- https://discord.gg/PgjYDAVd
Calculates Accurate Flex Temp Calculates Accurate V-speeds for Take-off Automatic METAR download Airport Database Included Including Runway Lengths Accurate THR/ACCEL Values Engine Out (EO) Procedures Included Uses Real Word Data Maximum Take-off Weights Calculated Based On Airport Conditions Easy Install & Regular Automatic Updates Tested By Real A320 Pilots

etc.

13 minutes ago, YouDontKnow said:

Thanks.

This will be precious as soon as FBW team will integrate the performance as effective.

 

It is my understanding that they are developing their own specific calculator, unique to their model.  It will be available on the FlyPad.  I think there are images of it on their Discord.  

5 minutes ago, Fiorentoni said:

You need to click on "see more" in the description:

BUY NOW:- www.simsmart.uk
SimSmart Discord Support:- https://discord.gg/PgjYDAVd
Calculates Accurate Flex Temp Calculates Accurate V-speeds for Take-off Automatic METAR download Airport Database Included Including Runway Lengths Accurate THR/ACCEL Values Engine Out (EO) Procedures Included Uses Real Word Data Maximum Take-off Weights Calculated Based On Airport Conditions Easy Install & Regular Automatic Updates Tested By Real A320 Pilots

etc.

Ah... thank you.  This particular action is disabled (not shown) in my install per my specific settings.  I have reenabled it so now it is visible.  I recall I shut this down about a year ago while dealing with another issue.  Thank you for your help.

It’s 4 Pounds. Bargain for this good data. 

Technically reduced thrust takeoffs procedure achieve savings in engine wear and maintenance, but not fuel economy according to the folks at Airbus.

https://ansperformance.eu/library/airbus-fuel-economy.pdf

Compared to a full thrust take-off, flex thrust will generally increase fuel burn. The increased time at low level offsets the slight reduction in fuel flow induced by the lower thrust.

See page 28 of the pdf.

The actual differences are very small, however.

One of the most important advantages of using Flex (or Assumed Temps) is that the Take Off Roll takes about the same time each Take Off. That allows for safer, more predictable and synchronized CRM. The importance of cannot be under emphasized.

1 hour ago, cavaricooper said:

One of the most important advantages of using Flex (or Assumed Temps) is that the Take Off Roll takes about the same time each Take Off. That allows for safer, more predictable and synchronized CRM. The importance of cannot be under emphasized.

What is the source of this information?  The length of the takeoff roll depends not only on the takeoff thrust being used, but also on the takeoff speeds. The takeoff speeds vary with the runway length, pressure altitude, OAT, and airplane weight. There is no way that the takeoff roll takes the same amount of time for every takeoff, though use of Flex may lessen the differences some.

 

On 2/16/2022 at 7:38 PM, Mike S KPDX said:

I have been into this type of item for about a year now for MSFS 2020.  I will say that that I have had discussions with the FBW developers and they are aware of all the apps listed in this thread.  They have gone on to say that none of the available ones apply to their NEO, yes - the numbers will be off, sometimes as much as 8-14 knots.  But the larger issue is, there is no airbus product currently available for this sim where the flex temp input has any impact.  MSFS A320 certainly does not utilize it and the FBW product has sub coding for it so it is part of the their upcoming plans. 

The EasyJetSimPilot project listed above is intriguing, but unless you have a sim plane that will properly utilize the data it provides, I am not sure of its utility.

The FBW A32NX does simulate Flex now.

On 2/17/2022 at 1:46 AM, spitzer45 said:

For flybywire a320nx, I think that it is not simulated for performance calculation, at least for now, so no matter what number you enter that line, i always use 50 degree celcius... 

It is simulated for engine thrust output for the A32NX.

On 2/17/2022 at 2:01 AM, hvw said:

It would be nice if FBW team can integrate such a calculator in the A320NX's EFB.

Although we are working on it, it will be some time before this happens.

On 2/17/2022 at 2:38 AM, tup61 said:

I wonder...

1. how real world pilots calculate all this?

2. IF real world pilots actually calculate all this?

3. what's the use of all this if the runways you take off from or land on usually are long enough?

I understand the eagerness for realism of some sim pilots but I personally always give full power at take off and never ran into problems doing so. 😉 The same goes for speeds: I simply accept the speeds the Airbus calculates and make sure I am going fast enough to not stall and that's it. Who cares about some 10 kts more or less. There is a limit to the realism I yearn for, I guess.

Re #3 first, with respect to MSFS I've often wondered this myself. MSFS pilots usually don't have to worry about failures during the takeoff that would jeopardize safety and necessitate the use of a correct V1, nor more than a minimum VR and V2. I doubt that the typical MSFS pilot would even know what V1 is for. But I understand the desire for the feeling of realism even if not all the realism aspects are there.

For #2, these calculations are required to be done for every takeoff in order to show compliance with takeoff performance regulations. Basically, transport category airplanes must be able to safely accelerate to the engine failure speed and then continue the takeoff with one-engine-inoperative, or reject a takeoff with the first action to stop the airplane taken at V1 and be able to stop the airplane within the available accelerate-stop distance. The airplane must also meet certain minimum climb requirements and be able to clear all obstacles under the takeoff path.

For #1, the calculations may either be done by the pilots using an EFB, or by a dispatch office using either an EFB or desktop computer.

 

Edited April 4, 20224 yr by Donstim