Maddog Flex Temp Calculator Options

[wims80]

Hi there!
I wrote a flex calculator for the Maddog, it havent been tested much tho, so there might be small errors. It uses the flex tables provided in the Maddog manual as datasource for the calculations. I will probably put up a website for the tool, but for now I'll just attach it on this forum. Let me know if you find any bugs or miscalculations!

-Wim

EDIT: New version changelog

CHANGELOG

v0.2 :
* Increased textbox size for QNH
* Fixed some of the "one engine out climb angle" tables, v0.1 had a few incorrect numbers

This post has been edited by wims80: 11/07/2010, 8:14

Attached File(s)

 MaddogFlexCalc_v0.2.zip ( 44.76K ) Number of downloads: 789

 

[Cyril Murat]

Hi there!
I wrote a flex calculator for the Maddog, it havent been tested much tho, so there might be small errors. It uses the flex tables provided in the Maddog manual as datasource for the calculations. I will probably put up a website for the tool, but for now I'll just attach it on this forum. Let me know if you find any bugs or miscalculations!

-Wim

Hi Wim.
This is both a good idea and a brilliant achievement. I've tested it with some random values and it seems to work just perfectly.
I'll use it for every flight since now and I thank you for that application.
Best flights
Cyril

[RogueRunner]

Great, I'll try it out. Thanx

[massimo]

Hi there!
I wrote a flex calculator for the Maddog, it havent been tested much tho, so there might be small errors. It uses the flex tables provided in the Maddog manual as datasource for the calculations. I will probably put up a website for the tool, but for now I'll just attach it on this forum. Let me know if you find any bugs or miscalculations!

-Wim

It's a good idea, but the runway table used in Maddog manual isn't realistic, (*) due not only to FS limitation (for i.e. runway slope). In real life there isn't a standard runway table valid for all airport in the world. As a matter of fact, each airport has a custom runway tables compiled from airlines.

If you believe, I can send you a complete real runway tables set of LIRF (as sample), for better understanding.

With real runway tables, you can calculate not only the Assumes Temperature (TO FLX), but all data to fill the Takeoff and Landing data form.

* Note (from Performance Chapter 05/4 Operation Manual - Maddog)

In real life airlines compile Runway Tables for each runway that is flown by their MD82 fleet.
The values on the tables are calculated taking into account not only the runway length, but also the slope, the presence
of obstacles, etc. Since it is impossible for us to provide the data for every runway we have simplified the tables in order
to take into account only the field length. A real Runway Table will also give the corrected V1, VR and V2 values for the
specific runway/condition that we have omitted.

[ivota]

thanks !!

It seems bug in program QNH frame (geometry).

h t t p://img15.imageshack.us/img15/4656/63029012.png

[wims80]

@massimo: Yes, I know this is not a real takeoff calculator, and that the calculations are very generic, doesnt take into account things like obstacles and slope (fsx doesnt really model slope for their runways anyways, does it?). This tool is not meant to be TOPCAT for the Maddog. Its simply a way to decrease the time it takes to look up the flextemps provided in the manual. It does not address the weaknesses of the single flex table system. I'd be interested in more accurate flex temperature data tho, so if you have some you'd like to get rid of then please let me know ;P

@ivota: That is strange, which OS are you using. Are you using bigger fonts than the default fontsize?

[jolk64]

Thank you very much Wims80 for this great piece of software

[ivota]

That is strange, which OS are you using. Are you using bigger fonts than the default fontsize?

Win7 x64 default fonts, Windows Classic Theme.
But, never mind...I will adapt.

[wims80]

I'll release a new version with bigger inputboxes as soon as i've set up a webpage for the tool

[Jared]

This is great! Now I can spend less time and not have to convert lbs to tons and do the manual lookup.

[Hodge]

Big thanks for this Wims

[kremin]

Hi there!
I wrote a flex calculator for the Maddog....................................

Hi Wim,

Thanks for that

[shazapis]

Excellent tool!

Thank you!

Spiros Chazapis
Athens, Greece

[Bertie Bott]

I like this very much! One suggestion, make the QNH window larger so that it can show all 4 characters at once. It's annoying to have to scroll to the right to check to make sure it accepted the last digit.

[jagabom]

Excellent tool. I agree with Bertie.

Jim
CYWG

[wims80]

New version with bigger textbox for QNH, download link in the first post

This post has been edited by wims80: 11/07/2010, 2:28

[Cyril Murat]

Thanks a lot for that little soft!
It is really usefull. Congratualtions
Cyril

[Javilg]

Wow!!

Thank you very much mate!
That´s a hard work for you and a big help for us!!

[claudio]

Thanks a lot for this little software, i think is very useful before waiting TOPCAT to maddog.
Thanks

Capitancg

[Paul J]

Wim, this is a great little application! Many thanks!

[trisager]

Wim, this is a great little application! Many thanks!

Agree, very useful little app. Thanks!
Tom

[gesto]

Hi there!
I wrote a flex calculator for the Maddog, it havent been tested much tho, so there might be small errors. It uses the flex tables provided in the Maddog manual as datasource for the calculations. I will probably put up a website for the tool, but for now I'll just attach it on this forum. Let me know if you find any bugs or miscalculations!

-Wim

EDIT: New version changelog

CHANGELOG

v0.2 :
* Increased textbox size for QNH
* Fixed some of the "one engine out climb angle" tables, v0.1 had a few incorrect numbers

I am new in the sim flying.Can you pls tell me how / when I may use your flex calculator ?
rgds

[Jared]

Hopefully this won't come off as a smart remark, if it does I'm sorry, but use his calculator if you wish to save your engines

How: enter the data for your given conditions and press the Calculate button.

This post has been edited by Jared: 17/09/2010, 19:19

[gesto]

Hopefully this won't come off as a smart remark, if it does I'm sorry, but use his calculator if you wish to save your engines

How: enter the data for your given conditions and press the Calculate button.

You have entirely misunderstood my question ! I mentioned that I am new in sim flying and asked for guidance.I am articulate enough to enter data and press the Calculate button .My question was what to do with the result ,where / when / how do I use it ?

[Jared]

Hopefully this won't come off as a smart remark, if it does I'm sorry, but use his calculator if you wish to save your engines

How: enter the data for your given conditions and press the Calculate button.

You have entirely misunderstood my question ! I mentioned that I am new in sim flying and asked for guidance.I am articulate enough to enter data and press the Calculate button .My question was what to do with the result ,where / when / how do I use it ?

Oh, you will get 4 results the assumed temp, eng out assumed temp, your headwind/tailwind component and a crosswind component.

To use the assumed temp:

1. Unguard the ARTs switch and place it off, remember to put it back to Auto after takeoff.
2. Select the assumed temp, it will display in the speed FMA window with the FDs on and the corrected or uncorrected EPR setting will display above the EPR indicators in the EFIS setup or the TRC in analog, the correction is made for pack and eng anti ice use.
3. Execute a normal takeoff.

This post has been edited by Jared: 18/09/2010, 5:52

[gesto]

Hopefully this won't come off as a smart remark, if it does I'm sorry, but use his calculator if you wish to save your engines

How: enter the data for your given conditions and press the Calculate button.

You have entirely misunderstood my question ! I mentioned that I am new in sim flying and asked for guidance.I am articulate enough to enter data and press the Calculate button .My question was what to do with the result ,where / when / how do I use it ?

Oh, you will get 4 results the assumed temp, eng out assumed temp, your headwind/tailwind component and a crosswind component.

To use the assumed temp:

1. Unguard the ARTs switch and place it off, remember to put it back to Auto after takeoff.
2. Select the assumed temp, it will display in the speed FMA window with the FDs on and the corrected or uncorrected EPR setting will display above the EPR indicators in the EFIS setup or the TRC in analog, the correction is made for pack and eng anti ice use.
3. Execute a normal takeoff.

Thank u for the reply ! May I ask another question ? Is this method better than leaving the program to decide ? Do you know what happens in real flying ?

[Jared]

Hopefully this won't come off as a smart remark, if it does I'm sorry, but use his calculator if you wish to save your engines

How: enter the data for your given conditions and press the Calculate button.

You have entirely misunderstood my question ! I mentioned that I am new in sim flying and asked for guidance.I am articulate enough to enter data and press the Calculate button .My question was what to do with the result ,where / when / how do I use it ?

Oh, you will get 4 results the assumed temp, eng out assumed temp, your headwind/tailwind component and a crosswind component.

To use the assumed temp:

1. Unguard the ARTs switch and place it off, remember to put it back to Auto after takeoff.
2. Select the assumed temp, it will display in the speed FMA window with the FDs on and the corrected or uncorrected EPR setting will display above the EPR indicators in the EFIS setup or the TRC in analog, the correction is made for pack and eng anti ice use.
3. Execute a normal takeoff.

Thank u for the reply ! May I ask another question ? Is this method better than leaving the program to decide ? Do you know what happens in real flying ?

In real flying there are more factors that will affect the assumed temp examples of this is runway slope, runway slope will affect the rate of acceleration, think up hill takes more power, downhill less and field elevation, the higher up you are the thinner the air is so it takes either more power to get the same acceleration rate or more ground roll to achieve the same thing, one airline had a T/O profile only for Denver Intl called "Denver Bump" but most US airlines dispatch figures this and the pilots get the data from ACARS or the final paperwork or the pilots use a mini calculator for takeoff figures Delta calls theirs the AWABS, Automated Weight And Balance System. His calculator is as close as we can get for now without having to convert kilos to lbs, in the case of modeling a US airline then looking up and comparing in the charts LSH provided or just doing the look up and compare.

Btw, the temp will work for both flaps 11 and 15 T/Os, Delta's preferred setting for T/O is flaps 11 and flap retract speed is either V2 + 5 or V2 + 15, however they do not bug it on the airspeed indicator they bug these speeds in this order:

T/O:

First white bug = V1
MCP command bug = V2
Second white bug = V2 + 20
Third = slat retract
Fourth = Clean Maneuvering

Landing:

First bug = Go Around
MCP bug = Target (min of Vref + 5 or Vref + wind additive not to exceed 20 knots)
Second = Flaps 15 Maneuvering
Third = 0/Ext Maneuvering
Fourth = Clean Maneuvering


wind additive is only applied if the steady wind is 10 knots or greater. Wind additive = half the steady headwind + all gust factor. (You use the higher number)

Example:

Landing on a 27 runway with a wind of 300 at 10 gust 15 you are going to land at about 120,000 lbs in a flaps 28 config, Delta's normal setting, this off the top of my head.

the angle between 270 and 300 is 30 degrees with the steady wind of 10 and a gust factor of 5, you look up your Vref, which if memory serves correctly, is 132 knots the headwind component is 8.5 I'll round to 9 to make easy math so half of 9 is 4.5 round to 5 plus the gust factor of 5 equals 10 so the corrected speed is 142, Vref + 5 is 137, compare 137 to 142 and you find that 142 is higher so you would fly 142 as your target approach speed. If the wind additive were over 20 knots then use Vref + 20.

Hope that doesn't make your head hurt once you do it a few times it is easier.

This post has been edited by Jared: 18/09/2010, 18:30

[gesto]

Hopefully this won't come off as a smart remark, if it does I'm sorry, but use his calculator if you wish to save your engines

How: enter the data for your given conditions and press the Calculate button.

You have entirely misunderstood my question ! I mentioned that I am new in sim flying and asked for guidance.I am articulate enough to enter data and press the Calculate button .My question was what to do with the result ,where / when / how do I use it ?

Oh, you will get 4 results the assumed temp, eng out assumed temp, your headwind/tailwind component and a crosswind component.

To use the assumed temp:

1. Unguard the ARTs switch and place it off, remember to put it back to Auto after takeoff.
2. Select the assumed temp, it will display in the speed FMA window with the FDs on and the corrected or uncorrected EPR setting will display above the EPR indicators in the EFIS setup or the TRC in analog, the correction is made for pack and eng anti ice use.
3. Execute a normal takeoff.

Thank u for the reply ! May I ask another question ? Is this method better than leaving the program to decide ? Do you know what happens in real flying ?

In real flying there are more factors that will affect the assumed temp examples of this is runway slope, runway slope will affect the rate of acceleration, think up hill takes more power, downhill less and field elevation, the higher up you are the thinner the air is so it takes either more power to get the same acceleration rate or more ground roll to achieve the same thing, one airline had a T/O profile only for Denver Intl called "Denver Bump" but most US airlines dispatch figures this and the pilots get the data from ACARS or the final paperwork or the pilots use a mini calculator for takeoff figures Delta calls theirs the AWABS, Automated Weight And Balance System. His calculator is as close as we can get for now without having to convert kilos to lbs, in the case of modeling a US airline then looking up and comparing in the charts LSH provided or just doing the look up and compare.

Btw, the temp will work for both flaps 11 and 15 T/Os, Delta's preferred setting for T/O is flaps 11 and flap retract speed is either V2 + 5 or V2 + 15, however they do not bug it on the airspeed indicator they bug these speeds in this order:

T/O:

First white bug = V1
MCP command bug = V2
Second white bug = V2 + 20
Third = slat retract
Fourth = Clean Maneuvering

Landing:

First bug = Go Around
MCP bug = Target (min of Vref + 5 or Vref + wind additive not to exceed 20 knots)
Second = Flaps 15 Maneuvering
Third = 0/Ext Maneuvering
Fourth = Clean Maneuvering


wind additive is only applied if the steady wind is 10 knots or greater. Wind additive = half the steady headwind + all gust factor. (You use the higher number)

Example:

Landing on a 27 runway with a wind of 300 at 10 gust 15 you are going to land at about 120,000 lbs in a flaps 28 config, Delta's normal setting, this off the top of my head.

the angle between 270 and 300 is 30 degrees with the steady wind of 10 and a gust factor of 5, you look up your Vref, which if memory serves correctly, is 132 knots the headwind component is 8.5 I'll round to 9 to make easy math so half of 9 is 4.5 round to 5 plus the gust factor of 5 equals 10 so the corrected speed is 142, Vref + 5 is 137, compare 137 to 142 and you find that 142 is higher so you would fly 142 as your target approach speed. If the wind additive were over 20 knots then use Vref + 20.

Hope that doesn't make your head hurt once you do it a few times it is easier.

Thank u Jared ! It did give me a bit of a headache but also made me realize that a lot of study is ahead of me .

[Cyril Murat]

Hi Wim.
I tried to contact you with a pm but I've been unable to.
May I ask you something?
I'd like to make the Flex Calculator available to French pilots of my VA and put it on my web site's Maddog's space:
h t t p://simu.toile-libre.org/espace_maddog/espace_maddog.html
Would you allow me to do so? I would of course mention your name and add a .txt file saying that you allow me to distribute the Maddog Flex Calculator.
Kind regards,
Cyril

[wims80]

Hi Wim.
I tried to contact you with a pm but I've been unable to.
May I ask you something?
I'd like to make the Flex Calculator available to French pilots of my VA and put it on my web site's Maddog's space:
h t t p://simu.toile-libre.org/espace_maddog/espace_maddog.html
Would you allow me to do so? I would of course mention your name and add a .txt file saying that you allow me to distribute the Maddog Flex Calculator.
Kind regards,
Cyril

Sure, no problem.