has the trim changed with DCS 2.1 update 1 - Page 3 - ED Forums
 


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Old 06-21-2017, 11:03 PM   #21
Yo-Yo
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20% of fuel and empty MW-50 bottle
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Ничто так сильно не ранит мозг, как осколки стекла от разбитых розовых очков (С) Me
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Old 06-22-2017, 07:42 AM   #22
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Thanks for the information, very useful to clarify the question..


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Old 06-22-2017, 10:18 PM   #23
rel4y
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I just wanted to clear something up. Sparflug is not the same as Reiseflug. Reiseflug translated freely means something like (combat) cruise and Sparflug means maximum range flight. For the K-4 1.15 ata/ 2400 rpm is Sparflug, not Reiseflug.

Example from a G-14 Entwicklungsblatt:

Sparflug
450 km TAS at 4 km

Reiseflug
480 kph TAS at 0 km
525 kph TAS at 4 km
610 kph TAS at 7.1 km

Last edited by rel4y; 06-22-2017 at 10:31 PM.
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Old 06-23-2017, 11:23 AM   #24
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Quote:
Originally Posted by rel4y View Post
I just wanted to clear something up. Sparflug is not the same as Reiseflug. Reiseflug translated freely means something like (combat) cruise and Sparflug means maximum range flight. For the K-4 1.15 ata/ 2400 rpm is Sparflug, not Reiseflug.
Hi relay,

i think you are with the numbers not right, here the numbers from the K-4 manual and also the same numbers from the DCS K-4 pdf:

Notleistung + Mw50 ( emergancy power ):
ATA 1.75 +- 0.01 at 2800 rpm +- 50 rpm, for 10 minutes

Steig/Kampfleistung ( Combat/Climb power ):
ATA 1.35 +- 0.01 at 2600rpm +- 50rpm, for 30 minutes

Reiseflug ( cruse power ):
ATA 1.25 +- 0.01 at 2400 rpm +- 65rpm, no time limit

Sparflug ( max range flight power ):
ATA 1.05. +- 0.01 at 2000 rpm +- 80 rpm, no time limit.

My question is, way in DCS the plane is trimmed for Sparflug (max rang flight ) and not as it was usualy in the German Luftwaffe to trimm the planes with the trimmslats on the ground for Reiseflug ( cruse power ) as with Reiseflug they reach there Reiseflug speed from around 450 Km/H.

regards

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Old 06-23-2017, 04:24 PM   #25
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RPM may be off, some documents list it at 2000 rpm others at 2400 rpm.

Sparleistung though is definitely 1.15 ata for the DB605DB, it is taken from an engine card. Kurfursts page is down atm, but there you can usually find the corresponding Motoren-Karte for the 1.8 ata setting. These are more accurate than whatever is written in the K-4 manuals, be it LW original or DCS.

In Yo-Yos picture he is flying at 1.15 ata which is Sparleistung => V(Ropt) and not Reiseflug V(Reise), thats what I wanted to clarify on. As you correctly said the aircraft were not trimmed for Sparleistung but Reiseflug = cruise.

For the K-4 Prototype (1750 PS) Reiseflug V(Reise) velocity is:
477 kph TAS at 0 km
645 kph TAS at 8.4 km

Last edited by rel4y; 06-23-2017 at 04:35 PM.
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Old 06-23-2017, 04:59 PM   #26
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Quote:
Originally Posted by rel4y View Post
RPM may be off, some documents list it at 2000 rpm others at 2400 rpm.

Sparleistung though is definitely 1.15 ata for the DB605DB, it is taken from an engine card. Kurfursts page is down atm, but there you can usually find the corresponding Motoren-Karte for the 1.8 ata setting. These are more accurate than whatever is written in the K-4 manuals, be it LW original or DCS.

In Yo-Yos picture he is flying at 1.15 ata which is Sparleistung => V(Ropt) and not Reiseflug V(Reise), thats what I wanted to clarify on. The aircraft were not trimmed to Sparleistung but Reiseflug = cruise.

For the K-4 Prototype (1750 PS) Reiseflug V(Reise) velocity is:
477 kph TAS at 0 km
645 kph TAS at 8.4 km
Hi rel4y,

never sayed you where not right on this, only rpm , i also say the 109`s where trimmed for ATA 1.25 cruise (Reise) at different rpm from E-4 to K-4 depends on engine. Only earlyer 109`s had cruise settings from ATA 1.15 cruise (Reise) and ATA 1.05 for fuel save flight. I also think that ATA 1.15 with around 2000 rpm`s is fuel save flight. Must be a doc. mistake that
ATA 1.05 for Sparflug.

regards

Little_D
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Old 06-23-2017, 07:19 PM   #27
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I know we are both on the same page here. If I remember correctly you mentioned this in another thread earlier, I just wanted to clarify on that.

Nice SoW videos btw. Id love to join in, but I am awfully busy the next two weeks. Be careful of the new gunners though, even at closing speeds of upwards 1000 kph they shot my wing off.

PS: On the other hand I am doing around 480 TAS with 1.15 ata @ 2000 rpm, so maybe its correct. What do I know?!

Last edited by rel4y; 06-23-2017 at 07:41 PM.
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