MW50 weird behavior

[JtD]

Not fixed with the new patch.

[LukeFF]

42 minutes ago, JtD said:

Not fixed with the new patch.

 

Acknowledged during beta testing but on hold for a later review.

[JtD]

It's been a while since I took the G-14 for a spin. I just did now, apparently this behaviour is still present. Are there any news on this issue? It's been two years, just wondering if it is on any list. Preferably the to-do list.

[Barnacles]

7 minutes ago, JtD said:

It's been a while since I took the G-14 for a spin. I just did now, apparently this behaviour is still present. Are there any news on this issue? It's been two years, just wondering if it is on any list. Preferably the to-do list.

This issue was solved I believe. You get 1,7 ATA up to just about 5k with ram air, and just below without, as it is modelled currently

[JtD]

You should be getting 1.7 without ram as well (up to 4km). It's still not correct, but could be different / improved from what it was 2 years ago.

[-=PHX=-SuperEtendard]

1 hour ago, JtD said:

It's been a while since I took the G-14 for a spin. I just did now, apparently this behaviour is still present. Are there any news on this issue? It's been two years, just wondering if it is on any list. Preferably the to-do list.

 

It was adjusted but not fully corrected (it still losses some manifold pressure but not as much as it did before ) 

 

The one thats working correctly is the new Bf 109 G-6 Late for Normandy. I hope they bring its engine model to the rest of the 109G lineup

[54th_Hashashin]

On 12/1/2020 at 5:05 PM, Barnacles said:

This issue was solved I believe. You get 1,7 ATA up to just about 5k with ram air, and just below without, as it is modelled currently

Can you tell me what ATA stands for?

[ZachariasX]

9 minutes ago, 54th_Hashashin said:

Can you tell me what ATA stands for?

Absolute pressure in a void. The technische Athmosphäre (at) is kilogram-force per centimetre square (kgf/cm2). Ambient air pressure at sea level is ~1 ata. Pressure in a way that makes it simple to calculate with it by using SI units rather than goofing around with imperial units.

[6./ZG26_Klaus_Mann]

Well, even for the regular 109Gs, with DB605A, 1.3ata/2600RPM should have an FTH of 5700m in a Climb and between 6400 and 6600m in Level Flight.

 

http://www.wwiiaircraftperformance.org/me109/VB-109-09-L-42.pdf

http://www.wwiiaircraftperformance.org/me109/VB-109-20-L-43.pdf

[the_emperor]

On 12/5/2020 at 9:06 PM, 6./ZG26_Klaus_Mann said:

Well, even for the regular 109Gs, with DB605A, 1.3ata/2600RPM should have an FTH of 5700m in a Climb and between 6400 and 6600m in Level Flight.

 

Yes, indeed.

THe DB605A is rated for 5700m FTH at 1.3ata/2600rpm and 1.42ata/2800rpm without ram and 6600m in level fligth with ram for both settings

The DB605AM (MW50 injection) is rated for 4000m FTH at 1.7ata/2800rpm without ram and 5000m in level flight with ram.

[6./ZG26_Klaus_Mann]

24 minutes ago, the_emperor said:

 

Yes, indeed.

THe DB605A is rated for 5700m FTH at 1.3ata/2600rpm and 1.42ata/2800rpm without ram and 6600m in level fligth with ram for both settings

The DB605AM (MW50 injection) is rated for 4000m FTH at 1.7ata/2800rpm without ram and 5000m in level flight with ram.

Yep, there is about 1000m Difference between FTHs, ingame there is barely 250m.

[JG5_Schuck]

One question with the MW50 on the G6 late.

At 2600rpm you get 1.30ata with or without the MW50. (sl)

Without

1.32ata @ 2650 rpm

1.36ata @ 2700 rpm

1.38ata @ 2750 rpm

1.42 max boost @ 2800 rpm

 

With MW50

1.36ata @ 2650 rpm

1.48ata @ 2700 rpm

1.58ata @ 2750 rpm

and 1.7ata @ 2800 rpm with MW50 enabled.

 

My question being, the max boost pressure for the engine was rated 1.42ata, 

but the MW50 equipped engine clearly runs above this without the MW50 enabled?

As far as i can see both engines should run the same boost pressures until the MW50 is enabled at 2800rpm,

and only then is the supercharger allowed to produce 1.7ata.

I have seen other articles relating to the hydraulic (fluid coupling) control of the supercharger, but non in conjunction with MW50.

As the tank and associated piping could be fitted in the field without and serious engine/supercharger modifications, it also stands

that an MW50 equipped engine could still run without any MW50 if non was available.... (as both engines where identical)

Does anyone have any additional information as it whether the MW50 is implemented correctly in game?

Thanks.

 

 

[JtD]

When MW50 was installed, the engine boost control system was changed, so that instead of going up from 1.30ata to 1.42ata past Kampfleistung, it would go up from 1.30ata to 1.70ata. In both cases in a linear fashion corresponding to the exact power lever position. The change was done by a manipulation of the linkage between power lever and throttle valve and mechanically independent from the actual MW50 system.

Addtionally, the pressure regulation for the engagement of the hydraulic clutch was changed, so that 1.7ata would be maintained on the way up. That's also independent from the actual MW50 system.

 

Finally, "at the foremost position", the power lever movement would engage a push button, which would trigger an electromagnetic valve and start the MW50 injection. It was to be set up that MW50 was active, when the power lever was "at the Sondernotleistung position".

 

Given the wording of the two text passages and the nature of a push button, in that it generally only works when it's pretty much pushed in all the way, it is likely that indeed the actual injection would not start until pretty much the end of lever travel, so that in between Kampfleistung and Sondernotleistung there might have been a window with higher boost, but without MW50 injection. All the manuals for the MW50 system point out the necessity to check if MW50 is indeed working, it might be more than just a precaution. It may also be to check if you have moved the power lever far enough.

 

Plus, if you had run out of MW50 or the system was not working, you could still run the engine at 1.70ata, because the boost regulation was set up that way. However, without the MW50, you'd damage the engine very quickly and there's plenty of advice in the manuals to take the necessary care to avoid that happening.

[JG5_Schuck]

Thanks..

I was wondering how the boost was controlled when the MW50 was engaged,

and thought that the increase in oil to the centrifugal fluid coupling  to increase the boost to 1.7ata was set up in such a way as that it only occurred when the MW50 was activated (@ 2800rpm)

thus helping to  avoid detonation due to the higher cylinder temperatures associated with higher boost.

Quite clearly running the boost over the allowed 1.42ata for even a short period of time without MW50 would result in engine damage/failure.

So the game is correct and running at higher boost was possible even if the MW50 had run out?

That is very interesting, thankyou.