do the ir deflectors effect anything

[evanf117]

do the ir deflectors effect engine performance and or ir signature or is it only visual

[sLYFa]

IIRC having them on reduces MTOW by 200kg or so. Not sure about how effective they are against IR SAMs

[Marklar]

According to this test they don't work, but it was 2 months and several patches ago. Maybe they do work now?

 

[Hummingbird]

One the same note: How do you remove them? 

[Marklar]

In the mission editor. 

[Hummingbird]

8 minutes ago, Marklar said:

In the mission editor. 

I couldn't find that option yesterday, where is it?  Is it via the load out slots? 

Edited October 18, 2021 by Hummingbird

[Marklar]

In the last tab with 3 dots. Same location as in all other helicopters.

[Marklar]

I did a test using Combined Arms and IR suppressors do actually work! Without suppressors I could get a IR signal from 1.7nm but with them attached the distance was reduced to 1.0nm.

[Castor Troy]

5 hours ago, Marklar said:

In the mission editor. 

You have the same option in the Mission Planner. Unless you fly a quick mission, then the MP is not available. You would have to use the ME editor, to edit the QM.

[AeriaGloria]

On 10/18/2021 at 1:43 PM, Marklar said:

I did a test using Combined Arms and IR suppressors do actually work! Without suppressors I could get a IR signal from 1.7nm but with them attached the distance was reduced to 1.0nm.

They have always worked, I won’t watch the GR video but I assume they thought it would cause a complete decrease in IR signature, which isn’t possible in DCS LUA as all things have only one IR sig between engine on and below AB. In the Mi-8 I always heard it decreased the distance needed for lock by a certain amount without actually changing the IR signature strength, that’s probably the case here

[Marklar]

No, they did the same test as I did. Hind is flying towards the SAM system and you measure at what point the IR seeker detects the helicopter. In their video they could detect Hind from the same distance whether it carried IR deflectors or not. Based on this I assumed deflectors didn't work back then but they do now.

[Sobakopes]

 Front aspect launch range for stinger is reduced from 2.15 to like 1.2 km. 

However rear aspect launches still happen at ~3 km or so. Why is the rear aspect more vulnerable? 

[AeriaGloria]

12 hours ago, Sobakopes said:

 Front aspect launch range for stinger is reduced from 2.15 to like 1.2 km. 

However rear aspect launches still happen at ~3 km or so. Why is the rear aspect more vulnerable? 

Exhausts are blocked from LOS at front, at rear they are nearly completely visible from lots of angles, the shrouds help cool it but their effect is biased towards the sides and front and below, places where without the shrouds you would have direct LOS to exhausts 

[Sobakopes]

24.10.2021 в 01:00, AeriaGloria сказал:

Exhausts are blocked from LOS at front, at rear they are nearly completely visible from lots of angles, the shrouds help cool it but their effect is biased towards the sides and front and below, places where without the shrouds you would have direct LOS to exhausts 

Actually the dev said that it will be changed in IR rework. 

Right now the game thinks that choppers are jets with huge hot nozzles in the rear. 

[Enduro14]

  Ya will be reworked

[Apok]

EWU reduced the exhaust gas temperature from 500-600 C to 150-200 C and helicopter thermal signature up to 60 %.

from Butowski P., Gruszyński J., Fiszer M., 2006, ,,Śmigłowiec bojowy Mi-24”, Wydawnictwo Magnum X, Warszawa.

[Hobel]

test vehicle  :

[Sobakopes]

13 часов назад, Hobel сказал:

test vehicle  :

Could you explain? I can't understand much in the video. 

[Shmegegge 1-1 Aero]

3 hours ago, Sobakopes said:

Could you explain? I can't understand much in the video. 

The IR SAM is able to get tone at much farther distances on the Hind without IR deflectors than the Hind without IR Deflectors.

Specifically, the SAM loses tone on the IR deflector Hind at 1.7nm, but is able to keep tone on the IR Deflector-less Hind until 3nm

[JetCat]

Hm i thought the Hind becomes completely invisible to IR tracking with this diffusor. It looks like cool fresh air is sucked into the deflector and forced-mixed with the hot exhaust gasses to cool them down even more before exiting upwards.

[AeriaGloria]

5 hours ago, JetCat said:

Hm i thought the Hind becomes completely invisible to IR tracking with this diffusor. It looks like cool fresh air is sucked into the deflector and forced-mixed with the hot exhaust gasses to cool them down even more before exiting upwards.

Doesn’t mean the exhaust is still normal atmospheric temperature. No baffle or diffuser will make it invisible without having to sacrifice all the power of the engine 

[Enduro14]

https://www.researchgate.net/publication/333548732_Infrared_Signature_Suppression_Systems_in_Modern_Military_Helicopters

 

"

In order to additionally improve the helicopter’s thermal signature reduction, ejected fresh air is

used to cool both the engines and the transmission. The engine exhaust nozzles are angled outward

from the airframe to better direct the output into the air-stream and they are cooled with outside air

from rotor downwash (while hovering in place) or with turbulent stream during progressive ight.

Mi -24 Hind is a Russian heavy attack helicopter. During the Afghan war, helicopters were

modernized and they received complex self-defense systems. In the rst phase, the thermal traps

launchers (ares and metallic foil strips ASO- 2W) were added. Helicopters were also equipped

with distracting shields EWU, designed to cool the exhaust gases. EWU reduced the exhaust gas

temperature from 500-600 oC to 150-200 oC and helicopter thermal signature up to 60 %

Edited November 6, 2021 by Enduro14