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AC103
17th Apr 2018, 01:25
Hi folks,

Looking for a comment from the spread sheet gurus. I am building an SS I can use to XC my take off and landing performance calcs on aircraft that publish a table rather than a chart. IMO tables are laborious and introduce greater risk of human error.

Ideally a spread sheet would have fixed variables like Weight, Altitudes, Head/Tail Wind Component, Slope, Surface, Surface Wet/Dry and then a table to input the run and 50ft clearance numbers for 3 weights, 3 head winds and 3 altitudes.

Has anyone done this before or seen something I could build from on their travels?

777AV8R
17th Apr 2018, 01:32
What type of aircraft?

CONSO
17th Apr 2018, 02:09
Hi folks,

Looking for a comment from the spread sheet gurus. I am building an SS I can use to XC my take off and landing performance calcs on aircraft that publish a table rather than a chart. IMO tables are laborious and introduce greater risk of human error.

Ideally a spread sheet would have fixed variables like Weight, Altitudes, Head/Tail Wind Component, Slope, Surface, Surface Wet/Dry and then a table to input the run and 50ft clearance numbers for 3 weights, 3 head winds and 3 altitudes.

Has anyone done this before or seen something I could build from on their travels?


A standard part of excel spreadsheets is an addon called solver- go to help and look it up and how to activate. It can handle multi variables via a number of different methods- so that if you input a few variables, it will calculate others.

May take an hour or two to get familiar and check certain examples

AC103
17th Apr 2018, 05:23
What type of aircraft?

Robin/Alpha R2160, anyone done one for them?

Solver looks interesting, good for working out what you can carry based on the constraints of the mission. It looks like I would still have to build the cascade of formulas to interpolate between know table entries and some if statements by the looks to slot the variables in between the correct table pairs ... Youtubing...

underfire
17th Apr 2018, 13:54
We built many, many spreadsheets like this for use in the procedure designs.

Many variables per ac variant, especially the different engine types, temperatures, bank angle, etc..EO, and load certs per airline. Turn performance also needs consideration, and how terrain is handled with turn performance.

This was all tied to horizontal and vertical profiles in Civil 3D coupled with Google Earth for the terrain.

The FAA has some spreadsheets you may want to look at, 8260.52_v7.4.xls,

there is ICAO GASA_graphics_tool.xls...

GASA
https://i.imgur.com/lAak05m.jpg

AC103
18th Apr 2018, 20:20
We built many, many spreadsheets like this for use in the procedure designs.

Many variables per ac variant, especially the different engine types, temperatures, bank angle, etc..EO, and load certs per airline. Turn performance also needs consideration, and how terrain is handled with turn performance.

This was all tied to horizontal and vertical profiles in Civil 3D coupled with Google Earth for the terrain.

The FAA has some spreadsheets you may want to look at, 8260.52_v7.4.xls,


That sounds fascinating, it would be very interesting to see the studies on the approach designs for NZQN.

Are you able to point me towards the FAA xls? I am having trouble finding it... Also any xls you could share that I might be able to get some idea for layout and so on would be great.

underfire
18th Apr 2018, 20:34
Not sure where to find that spreadsheet anymore...

CONSO
19th Apr 2018, 04:39
That sounds fascinating, it would be very interesting to see the studies on the approach designs for NZQN.

Are you able to point me towards the FAA xls? I am having trouble finding it... Also any xls you could share that I might be able to get some idea for layout and so on would be great.


might start here

https://www.faa.gov/documentlibrary/media/order/nd/8260_52.pdf

or

https://www.faa.gov/search/?omni=MainSearch&q=8260.52

AC103
25th Oct 2018, 20:33
I thought I should share what I came up with. Rather clunky, but was helpful as a way to learn a little xcl.

john_tullamarine
26th Oct 2018, 11:18
I put some comments in your other thread. Take away for this thread is

(a) heavy aircraft - lots of work

(b) (typical) light aircraft - easy peasy as you only have a few carpets to model.

Hardass56
27th Oct 2018, 14:36
Hi AC103,
Pls PM me with your email. I can send you some xl stuff I have been working with