Wind Modelling
#1

I know that there are some mods that models wind/gusts etc ingame (but i guess that they wont work unless you actually edit the .mis to incorporate the mod right?) ..

The reason why i posted this thread is because of a stupid thing called an arrested landing on an aircraft carrier.

In this video, you'll see a FAA Corsair land and take off on an Illustrious class CV:

http://www.youtube.com/watch?v=P5exhsvbGso&NR=1

(Notice the curved approach. Thats how naval aviators approached the carrier back in the days.. The straight-in approaches that i've seen in so many tutorials piss me off, they all get it wrong.)

Notice the smooth touchdown? Even when i do some of the best landings ever, im never able to make it look that good. (Except if i fly a Zero or something, that airplane is dead easy to land)


My theory is that the game fails to replicate the 30kts (approx) of wind running across the deck coupled with the ships own speed (between 20-30kts) .

So that would make the total speed of the ship (relative to the aircraft) about 50-70kts? Or am i going completely haywire here?
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#2

In Dogfight mode (online) carriers are static objects. In offline play they are moving objects.

I remember someone hacked mission files using a text editor and set the carrier's forward speed to a couple hundred kph. He could thus fake VTOL in a P-51 (without using any mods/cheats)

Il-2 doesn't model cross-winds (or other atmospheric effects), only the velocity of the carrier.
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#3

You are right in saying that wind is not replicated unless you use the atmosphere mod which is incorporated into many mod packages e.g UI 1.2, HSFX and UP.
It is very easy to use and the "readme" file in each mod package explains the addition of just a few lines of text in the "mis" file.

Many of the tutorials were posted before the atmosphere mod was created and so you will not see the curved approach used to such advantage.

Have a look at your "readme" file for the atmosphere mod in whatever install you are using (except 4.09 vanilla) and fill your boots with carrier speed and wind.

For a laugh, I made a mission for a "vertical circuit". T/O, sidestep the deck and land without going anywhere (used 80Kts wind speed)

So the answer is, you can replicate whatever wind over the deck you like and with practice your Corsair landings will look just like the one in the video.

Good luck

Nicholaiovitch Smile
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#4

I thought the curved approach was used exclusively with the Corsair. The big nose was difficult to see over on a straight on approach. It had nothing to do with windspeed or direction.
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#5

RASmith1030 Wrote:I thought the curved approach was used exclusively with the Corsair. The big nose was difficult to see over on a straight on approach. It had nothing to do with windspeed or direction.

Correct, but i think the curved approach then became standard practice for both the USN & FAA - for the reason given (visibility). Even with the introduction of angled decks, during a CASE 1 recovery (visual as opposed to a radar to visual approach) the final circuit is somewhat curved. Ashore military aircraft fly a curved approach from the downwind leg as opposed to the 'rectangle' shaped circuit that civvy a/c fly.

realistically you need to set your carrier speed to approx 50-60 km/h to give a 20-30 knot ship speed, and because there is nil wind, that really is the minimums to fly a realistic approach.

Back in the '80s my flying grade instructor in the RN was an ex Sea Fury/firefly pilot who subsequently went on to fly phantoms. His 'demonstration' of how to use sideslip to lose height/speed & retain visibility of the runway during approach was ..........interesting!
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#6

RASmith1030 Wrote:I thought the curved approach was used exclusively with the Corsair. The big nose was difficult to see over on a straight on approach. It had nothing to do with windspeed or direction.

Thats not what i said. Look at 2.55 into the vid, thats a Hellcat.
http://www.youtube.com/watch?v=Vj7OZgUhrs0

That is a curved approach! It was standard procedure amongst allied pilots! How else could you see the LSO?
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#7

Nicholaiovitch Wrote:You are right in saying that wind is not replicated unless you use the atmosphere mod which is incorporated into many mod packages e.g UI 1.2, HSFX and UP.
It is very easy to use and the "readme" file in each mod package explains the addition of just a few lines of text in the "mis" file.

Many of the tutorials were posted before the atmosphere mod was created and so you will not see the curved approach used to such advantage.

Have a look at your "readme" file for the atmosphere mod in whatever install you are using (except 4.09 vanilla) and fill your boots with carrier speed and wind.

For a laugh, I made a mission for a "vertical circuit". T/O, sidestep the deck and land without going anywhere (used 80Kts wind speed)

So the answer is, you can replicate whatever wind over the deck you like and with practice your Corsair landings will look just like the one in the video.

Good luck

Nicholaiovitch Smile

Thnx for your reply!
I haven't got a problem landing, its just that the landings seems to be faster and "harder" ingame compared to what we see from ww2 film. I think i'll have to fiddle with the atmosphere mod, see if i can simulate real life conditions. (If i succeed, i'll have to make a video i think.)

Hopefully, Oleg will implement it in the SoW series. (So that you could decide where the wind is coming from via the mission builder instead of tweaking the .mis file)
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#8

Perhaps Oleg will include an LSO to grade your landings!!!!
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#9

You can add this to the bottom of the mission file and set the speed of wind to what
ever you like.

This works in DF servers also .

[Weather]
WindVelocity 10
WindDirection 45
WindTop 1800
WindTurbulence 0
WindGust 5
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#10

thanks "skyomish"
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#11

skyomish Wrote:You can add this to the bottom of the mission file and set the speed of wind to what
ever you like.

This works in DF servers also .

[Weather]
WindVelocity 10
WindDirection 45
WindTop 1800
WindTurbulence 0
WindGust 5

Thanks, the WindVelocity option, is it in kts or mph?
This may sound noobish, but where can i actually find out about my aircraft carriers heading? (Im not really a mission maker at all, i just create simple & short missions so that i can hone my carrier landing abilities in different weather conditions.)
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#12

Just place your waypoints in a straight line (direct up the page for North etc), then set the wind for South (180 degrees). other wise create a simple game, trial it & make a not of compass heading of your fighter when aligned on carrier deck. Now exit game and ajust wind to head on recipriacl heading. (e.g in the QMB game of "coral Sea", both the Jap & US/UK carriers are heading West (270) , so the wind would need to be set to head east (090).

I'm going to have a go at setting some wind conditions in a game - To be really clever I'll create some smoke near the airfields so as to show wind direction and assist in choosing landing direction.
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#13

RichardH, the wind speed is in meters per second. That value of 10 equates to about 19 kts of wind. With that value, you can get the plane to touch down fairly realistically. The one problem you have to overcome is the bounce that Oleg has put into the game engine, or FM. If you have any flying speed at all, the plane will bounce back into the air as if it were in a pogo stick. You have to learn to arrive over the ramp at just barely above stall speed, then cut and hold the stick back for the touchdown. Using your curved approach, you will be able to judge your altitude such that, when you do arrive over the ramp, at just above the stall speed, you are not more than about half a wingspan above the deck when you pull off the power. This will prevent you from building up too high a rate of sink as the plane settles onto the deck.

The ships would typically turn into the wind, for flight operations, and put on just enough steam to result in a particular target wind speed over the deck. This number was generally around 30-35 knots. They would go faster in a light breeze, and slower in a stronger wind. This was so that the pilots would always face the same relative wind over the deck for launch and recovery. The same principle applies to today's modern carriers.
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#14

Exactly as Razor has said....you need minimum speed over the deck and with the wind mod active, this is now possible.

The direction of the wind entry in an above post is incorect. You use the standard aviation entry of assigning the direction of wind from where it is blowing i.e. if it is blowing from the south then you enter 180 as the direction.

I have made many carrier missions both DF and single using the wind mod and it does now enable you to get a realistic curved approach and touchdown at minimum speed (difficult before the mod)

Here is a very simple mission for you spawning downwind from the carrier (steaming at 25kts) with a wind speed of 17ms (around 35kts). Also enclosed is a TRK to load into your "Records" folder if you want to see that IL2 is now able to replicate your video.

The mission was made with UI 1.2 so unless you have this or similar mod package, it may not work. Load the two files into your "Single" mission folder under one of the countries and in a single mission file. If you open the mission in FMB, you may lose the [weather] lines, so you need to make a copy of these.

Here is the link:-

www.datafilehost.com/download-6c64b2d3.html

Nicholaiovitch Smile
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#15

Nicholaiovitch Wrote:Exactly as Razor has said....you need minimum speed over the deck and with the wind mod active, this is now possible.

The direction of the wind entry in an above post is incorect. You use the standard aviation entry of assigning the direction of wind from where it is blowing i.e. if it is blowing from the south then you enter 180 as the direction.

I have made many carrier missions both DF and single using the wind mod and it does now enable you to get a realistic curved approach and touchdown at minimum speed (difficult before the mod)

Here is a very simple mission for you spawning downwind from the carrier (steaming at 25kts) with a wind speed of 17ms (around 35kts). Also enclosed is a TRK to load into your "Records" folder if you want to see that IL2 is now able to replicate your video.

The mission was made with UI 1.2 so unless you have this or similar mod package, it may not work. Load the two files into your "Single" mission folder under one of the countries and in a single mission file. If you open the mission in FMB, you may lose the [weather] lines, so you need to make a copy of these.

Here is the link:-

www.datafilehost.com/download-6c64b2d3.html

Nicholaiovitch Smile

Thanks! Yeah, i noticed that the wind direction was wrong. I set the heading directly north with my ship, and thus the wind heading/direction should be 0/360 ..
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