Wind in CloD Full Mission Builder Guide

[Sokol1]

Default missions of CloD has a wind blowing from 270 to 90 (magnetic direction), speed of 3 meters/second.

In other ground start missions only (no way to know in air start missions) "Sector Controller" (TAB - 7 - 3) report direction from where wind come, their speed in meters/seconds and an useless "ideal" strip direction number (in 3 digits) - ignore this last information, don't make much sense*, look at windsock if available or runway yellow boards.

 

But this "Sector Controller" report consider magnetic heading, that account 1940's 10º West magnetic declination.

 

 

This 10º make difference for level bombing, the wind heading should correct accordingly for "wind triangle".

 

In CloD FMB wind direction is set in CAD coordinates - FMB convert this in magnetic direction: 

 

 

North= 90

Northwest = 135

West =180

Southwest = - 135

South = -90

Southeast = -45

East = 0 

Northeast = 45

 

This coordinates determines the magnetic direction in what wind blow TO. 

Example: An 0 coordinates means a wind blowing in a magnetic course of  270º to 0º, that means a true course of 280º to 10º.

3 is wind speed in meters/seconds.

Strip 330 - ignore, see bellow.

 

Perhaps for avoid complicate more the life of poor virtual pilot, mission builder should consider make "Sector Controller" report in true course, adding 10 (clockwise) in coordinates and always inform wind direction, speed in missions briefing.

 

* The (ideal) strip direction calculation done in FMB  seems mirrored, for a 30 > 210º wind in Bembridge "Sector Controller" suggest a non existing runway 330 (º), that is on opposite quadrant of wind direction, in this case the "ideal runway" should be 30º, against wind direction.

 

 

In this picture the weather report (210 3 330) for a wind set in FMB at coordinates -130,  blowing from 40º to 220º (true direction), say 210 - an magnetic direction.

 

 

Anyway in Bembridge existing runways are 10 and 28, signaled with yellow boards for take-off and red-white for landing.

 

Then, this "Strip" report more hinder than help, is mirrored, suggest non existing runways and CloD airfields - like 1940's grass airfields, don't have numbers painted in runways ends.

 

Is possible set wind direction and speed, manually in mission file, but this involve do sine and cosine math - see this Bonkin topic:https://www.aircombatgroup.co.uk/forum/viewtopic.php?f=5&t=8360

Edited March 6, 2019 by Sokol1
Fix image

[Sokol1]

"Fiddling" more with this, discover that "Sector Controller" weather report is not in magnetic direction (in above example just happen 10º off-set coincidence with value set in FMB)*, but in 12-point "Wind Rose", seems following and ancient Greek 12-point Wind Rose (Timosthenes):

 

 

0º = North = FMB Wind Direction coordinates between 70 and 90 - for simplicity use 90

30º= North-Northeast  = FMB Wind Direction coordinates between 40 and 60  - for simplicity use 60

60º = Northeast  = FMB Wind Direction coordinates between 10 and 30  - for simplicity use 30

90º = East =  FMB Wind Direction coordinates between 0 and -20  - for simplicity use 0

120º = Southeast =  FMB Wind Direction coordinates between -30 and -50  - for simplicity use -30

150º = South-Southeast =  FMB Wind Direction coordinates between -60 and -80  - for simplicity use -60

180º = South =  FMB Wind Direction coordinates between -90 and -110  - for simplicity use -90

210º = South-Southwest = FMB Wind Direction coordinates between - 120 and -140  - for simplicity use -120

240º = Southwest = FMB Wind Direction coordinates between -150 and -170  - for simplicity use -150

270º = West =  FMB Wind Direction coordinates between 160 and 180  - for simplicity use 180

300º = Northweast  = FMB Wind Direction coordinates between 130 and 150  - for simplicity use 150

330º = North-Northweast  = FMB Wind Direction coordinates between 100 and 120  - for simplicity use 120

 

* CloD = Murphy law. ?

 

Then, the only reason for set a given wind direction in FMB instead use these 30 degree range, e.g. set to 45º (coordinates -133), is if mission maker want follow an historical weather report.

 

Add to this, that if no changed wind gust is for default 44º - wind direction varies dynamically across the day under this value, so this divisions in 30º degrees for wind direction match this feature.

 

Edited March 8, 2019 by Sokol1

[jollyjack]

with CoD BLITZ i tried to find an Extras folder with an FMB editor ... not there?

[Sokol1]

Main menu > Extras > Full Mission Builder.

 

Don't understand what you mean with "Extra folder", CloD FMB is embed in game files. 

[jollyjack]

yep, just found that one out ....  BTW i came across this archive of 1C s forum about FMB: http://forum.1cpublishing.eu/archive/index.php/f-203.html

 

 

Edited July 21, 2019 by jollyjack

[paul_leonard]

I know this is an old post, but the title remains relevant and the information above also relevant.  Also, there are so many old posts with still relevant information that are lost as they are buried under new posts, and need to be resurrected from time to time. 

 

Anyway...

 

The wind direction and speed set in the FMB by the mission builder also affects the runway (if more than one) and takeoff and landing direction for the AI aircraft, as they will always endeavour to take-off/land into the wind.  This means the mission builder can influence same.  

 

Why might the builder do this?

 

1 - Historical accuracy

2 - Undocumented feature workaround

 

HISTORICAL ACCURACY

For the UK the British Air Ministry Meteorological Office published weather reports four times daily for 46 weather stations around the country.  The full archive for the entire war is available at the following link:

https://library.metoffice.gov.uk/Portal/Default/en-GB/recordview/index/626310

 

For anywhere else in the world, a very cool historical weather database has been made available to the public using weather data going back to 1940.  You can create and download tables of hourly weather data for pretty much anywhere and anytime.  This is very useful for say missions over France and particularly for North Africa.  The database can be found at the following link:

https://open-meteo.com/en/docs/historical-weather-api

 

UNDOCUMENTED FEATURE WORKAROUND

There are a number of airfields with landforms (creeks and hills) and objects (like windmills and very large trees) that can interfere with the takeoff and landing of AI aircraft.  This is particularly problematic for bombers that appear to have a flatter landing glideslope than fighters, making them more prone to hitting a nearby hill or windmill.  There is also one tree next to a taxiway at Calais-Marck that likes to reach out and grab anything that passes by it.  Generally speaking trees and windmills and such can be fixed by the mapmakers if they become aware of it.  Landforms are a lot more work, and generally the cost benefit doesn't warrant the big investment in time to move hills and towns and other big objects.  The workaround is just change the wind direction.  If only one runway just change the wind direction by 180 degrees and the AI aircraft will takeoff/land in the opposite direction, or if more than one runway, adjust the wind accordingly to incent the AI to choose a different runway.

 

I also attached a little spreadsheet that calculates the wind speed and direction figures that are actually created within the ".mis" file as noted in an earlier post in this thread as well.  Simply choose your system of measure, input wind direction and speed and it will provide you with the figures you would need to enter into the mission file.  Better to let the FMB do the calculations, but to each there own.

 

Lenny

Wind Power Calculator - V2.zip

[BENKOE]

23 hours ago, paul_leonard said:

...>

HISTORICAL ACCURACY

For the UK the British Air Ministry Meteorological Office published weather reports four times daily for 46 weather stations around the country.  The full archive for the entire war is available at the following link:

https://library.metoffice.gov.uk/Portal/Default/en-GB/recordview/index/626310

 

 

 

Thank you for this very informative link, @paul_leonard.

Regarding the accuracy of weather, where can I find references to barometric pressure and humidity in the Full Mission Builder?

[paul_leonard]

My understanding is that the average air temperature on the map and possibly barometric pressure and other weather settings are embedded directly into the map and cannot be changed, except by using one of the other seasonal maps.  My further understanding is that changes to these core weather settings can have a very significant, undocumented, and unexpected impact on aircraft behaviour and performance, particularly when flying at higher realism settings.  

 

So short answer, not in the Full Mission Builder.  I don't think that will change with the implementation of TrueSky.