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DB 605A limits


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Posted

Few days ago I found that the engine limit of Bf 109G-2 depends on throttle lever position not on ata/rpm. If I have the technical messages on the "continuous mode" notice appeared at 1.2/2 400 at low altitude only. At 4 000 m it appears at about 1.12/2 400 and at 5 000m at some 1.08/2 400. But the throttle message always shows some 92 % for "continuous mode" report. This makes the flight with technical tips off impossible (since I have no idea of ata/altitude relation to the limitations). 

 

I just want to ask some more informed 109 gurus if the engine ata limits were dependable on altitude or if it's just a game bug.

SCG_Space_Ghost
Posted

Few days ago I found that the engine limit of Bf 109G-2 depends on throttle lever position not on ata/rpm. If I have the technical messages on the "continuous mode" notice appeared at 1.2/2 400 at low altitude only. At 4 000 m it appears at about 1.12/2 400 and at 5 000m at some 1.08/2 400. But the throttle message always shows some 92 % for "continuous mode" report. This makes the flight with technical tips off impossible (since I have no idea of ata/altitude relation to the limitations).

 

I just want to ask some more informed 109 gurus if the engine ata limits were dependable on altitude or if it's just a game bug.

Ata will go down as altitude goes up.

 

The Gustav's throttle is currently afflicted with a non-linear control bug.

 

Ignore %'s because that concept doesn't make much sense and it will teach you bad management habits - stick to 1.2ata for non-combat flight and bump it up to 1.3ata when it is necessary in combat.

Posted

I would like to. But the "Combat mode" message which appears at low ata at higher altitudes makes me a bit nervous. If the message is just misleading I'd be more than happy. Since checking fixed ata is way easier than checking the throttle lever position.

 

But are you sure the message is wrong and the throttle limit application in game are right?

SCG_Space_Ghost
Posted

I would like to. But the "Combat mode" message which appears at low ata at higher altitudes makes me a bit nervous. If the message is just misleading I'd be more than happy. Since checking fixed ata is way easier than checking the throttle lever position.

 

But are you sure the message is wrong and the throttle limit application in game are right?

 

The messages are misleading since the real DB605A doesn't deal with all the % jazz the way BOS does.

 

You should seek to throttle to meet an RPM/ata. setting just the same as you would have been taught if you were a fledgling Jaeger. You shouldn't equate throttle to meeting an "85% Combat Mode" that simply makes no technical sense since 85% yields different results at different altitudes.

 

I'm sure that those issues will be patched out some day but until then fly by the instruments and you will be a happy camper. If you fly by the technochat and the technochat alone, you will blow so many 605s you'll be meeting with the head of provisioning and maintenance.  ;) 

 

(BTW, the 605A as currently modeled is practically indestructible by abuse anyway.)

Posted

Boost/rpm and lever position relation is buggy. Boost over altitude is buggy. Han says everything is correct and does not want to change or even talk about it, he considers it waste of time (case closed).

 

You can't fly infinitely in combat mode, though practically the limit is pretty large.

If you fly according to the handbook, you fly according to rpm, which do not change with altitude. Looking at boost is for noobs ;).

SCG_Space_Ghost
Posted

If you fly according to the handbook, you fly according to rpm, which do not change with altitude. Looking at boost is for noobs ;).

Care to cite that RLM or Messerschmitt handbook? Line and paragraph information?

SCG_Space_Ghost
Posted

I just wanted to throw this out there now that I cannot edit my previous post:

 

In the case of variable-speed propeller craft, I do agree with you JtD.

 

In the case of constant-speed propeller craft (most specifically the 109 G-2 and the DB605A), I do not agree with you.

 

The kommandogerät employed by the G-2 nullifies the need to fly by RPM opposed to Ata.

Posted

Care to cite that RLM or Messerschmitt handbook? Line and paragraph information?

Any "Bedienungsvorschrift Fl" for Bf109G, part "Flugbetrieb", section "Flug", paragraph "Motordrehzahl und Ladedruck".

Posted

The kommandogerät employed by the G-2 nullifies the need to fly by RPM opposed to Ata.

Not above critical altitude.

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