Bf 109 G-14 Nuances

[=EXPEND=Tripwire]

I am keen to read things people have discovered during test flights or during combat that is new to the Bf 109G14 With DB605AM engine.

 

First up a couple I have noticed,

 

The low injection pressure warning that appears with HUD on and tool-tips enabled is in reference to the MW50 injection pressure. If you don't have the throttle at or very close to 100% injection pressure drops to the point of MW50 not being injected and you are back to ~1 minute before engine destruction.

 

1.7ATA is only sustained up to about 1.5-2km at which point it starts to drop off back down to around 1.4ATA as you climb through to FTH at ~6km. I assume this is due to the supercharger not being strong enough to maintain 1.7ATA?

Edited May 26, 2018 by =EXPEND=Tripwire

[Kurfurst]

14 minutes ago, =EXPEND=Tripwire said:

1.7ATA is only sustained up to about 1.5-2km at which point it starts to drop off back down to around 1.4ATA as you climb through to FTH at ~6km. I assume this is due to the supercharger not being strong enough to maintain 1.7ATA?

 

It should be 1,7ata all the way up to 4000 m in climb and 5000 m in max speed level flight. What you describe is odd - as if they have modelled it like the 109E type of boost, i.e. only effectice in the first supercharger speed (which is wrong for the G-14).

[Wolfram-Harms]

1 hour ago, VO101Kurfurst said:

What you describe is odd - as if they have modelled it like the 109E type of boost, i.e. only effectice in the first supercharger speed (which is wrong for the G-14).

 

Wow, I just checked out your website - VERY interesting test reports and data sheets there!

[JtD]

2 hours ago, VO101Kurfurst said:

 

It should be 1,7ata all the way up to 4000 m in climb and 5000 m in max speed level flight. What you describe is odd - as if they have modelled it like the 109E type of boost, i.e. only effectice in the first supercharger speed (which is wrong for the G-14).

 

It's even odder than that, with ram utilization you get the 1.7ata all the way up. I suppose there's a bug with the plane.

 

I also don't understand how MW50 and the increased boost are not binary, either the switch is on, or off.

[=EXPEND=Tripwire]

OK so to get 1.7ATA the plane needs ram air at full level speed? The engine at full throttle and 2800 rpm is not enough? 

[JtD]

In game it does, in real life it didn't.

 

(At medium altitudes.)

[=RvE=Windmills]

Is the MW50 injection historically tied to full throttle? Old Il2 you had to activate it manually.

[FTC_DerSheriff]

9 minutes ago, Windmills said:

Is the MW50 injection historically tied to full throttle? Old Il2 you had to activate it manually.

There is a switch in the cockpit where you can activate MW50. However in the real thing MW50 was only and automatically used when the throttle was full forward. In RL you could therefore use full boost without MW50 but with a engine overheating very fast. 

I have no clue about the rest and if the 1.7ata are supposed to be stable or not.

Edited May 26, 2018 by DerSheriff

[JtD]

You activate the system (Einsatzklarschalter - 'ready for use switch'), and then MW50 automatically starts being injected when you go above Kampfleistung, to the foremost position for the throttle lever. There is a throttle linked push-button (gashebelgekuppelter Druckknopfschalter), which switches on the MW50 injection via an electrically activated valve.

 

The Einsatzklarschalter was supposed to be deactivated at high altitude, where there was no benefit from using MW50, in order to not waste MW50.

 

In game I haven't found a way to deactivate MW50 manually.

[Finkeren]

10 minutes ago, Windmills said:

Is the MW50 injection historically tied to full throttle? Old Il2 you had to activate it manually.

 

The devs are usually quite accurate about these details.

[PainGod85]

31 minutes ago, DerSheriff said:

There is a switch in the cockpit where you can activate MW50. However in the real thing MW50 was only and automatically used when the throttle was full forward. In RL you could therefore use full boost without MW50 but with a engine overheating very fast. 

I have no clue about the rest and if the 1.7ata are supposed to be stable or not.

 

In addition - and this is regardless of the fact the engine would literally blow up in your face - the lack of charge cooling means net hp is also lower due to thermodynamics, in the ballpark of 200 hp.

[danielprates]

36 minutes ago, JtD said:

(gashebelgekuppelter Druckknopfschalter)

 

Does the hottentotten attentatter know about this?

[PainGod85]

32 minutes ago, JtD said:

You activate the system (Einsatzklarschalter - 'ready for use switch'), and then MW50 automatically starts being injected when you go above Kampfleistung, to the foremost position for the throttle lever. There is a throttle linked push-button (gashebelgekuppelter Druckknopfschalter), which switches on the MW50 injection via an electrically activated valve.

 

The Einsatzklarschalter was supposed to be deactivated at high altitude, where there was no benefit from using MW50, in order to not waste MW50.

 

In game I haven't found a way to deactivate MW50 manually.

 

You know, sometimes my own native language is giving me PTSD.

[Desteban]

28 minutes ago, PainGod85 said:

 

You know, sometimes my own native language is giving me PTSD.

 

After reading JtD's post I was thinking the same ?

[Yogiflight]

1 hour ago, JtD said:

The Einsatzklarschalter was supposed to be deactivated at high altitude, where there was no benefit from using MW50, in order to not waste MW50.

And when the MW50 tank was empty.

[PainGod85]

9 minutes ago, Yogiflight said:

And when the MW50 tank was empty.

 

 

[SAS_Storebror]

Maybe the real docs about the MW system help to shed some light on this.

 

Cheers!

Mike

[=EXPEND=Tripwire]

Dragging this thread back up -

 

I noticed that the G14's automatic radiators appear to keep the coolant temperature at around 100 degrees C, in contrast to the earlier 109's where 80 degrees is the norm.

Is this an error, or did the real G14 have an adjustment made to attempt to hold coolant at this higher temperature?

 

100 degrees C was what the earlier 109s used to run at as well >2 years ago before being corrected.

[KingstonDE]

Hi gents,

 

did a quick test with G-14. When you go to 1.7 ATA at low level you have a MW-50 pressure from around 0,75. As soon the ATA drops, the MW-50 pressure drops to 0,50 or even lower.

Get we maby to less MW-50 over 1000m into the system?

 

Regards

 

Little_D

[Bilbo_Baggins]

Hey gents, moving away from the motor discussion here for a moment, I don't have it yet and would like to ask if the G14 handles much differently with the taller tail section and larger rudder?

 

There is a subtle difference in the feel of changing direction and rolls with the fixed tailwheel machines (g6, g4) compared to the retracted G2, so I am quite curious if the taller tail and larger rudder have any noticeable difference?

 

RGDS

Edited October 2, 2018 by Bilbo_Baggins

[69TD_Hajo_Garlic]

3 hours ago, Bilbo_Baggins said:

Hey gents, moving away from the motor discussion here for a moment, I don't have it yet and would like to ask if the G14 handles much differently with the taller tail section and larger rudder?

 

There is a subtle difference in the feel of changing direction and rolls with the fixed tailwheel machines (g6, g4) compared to the retracted G2, so I am quite curious if the taller tail and larger rudder have any noticeable difference?

 

RGDS

I notice better handling at higher speeds than usual in 109s in the g14.  It could just be something like the mw50 pushing me through turns but I think that the tail helps.  Can't say I notice much at low speeds but I don't like getting slow in the g and k series.

Edited October 2, 2018 by Joeasyrida

[E69_geramos109]

On 5/26/2018 at 8:13 AM, VO101Kurfurst said:

 

It should be 1,7ata all the way up to 4000 m in climb and 5000 m in max speed level flight. What you describe is odd - as if they have modelled it like the 109E type of boost, i.e. only effectice in the first supercharger speed (which is wrong for the G-14).

I made a topic bout that on the fm forum. Looks that something is wrong modelled.