Pe-2 Series 35, Il-2 M1941, and Bf 109 F-2 Operating Notes

[LukeFF]

As the cockpits for the three new planes are essentially the same as the older ones, this update will simply look at what changes can be found with the new planes:

Bf 109 F-2:

Max Continuous Power: 1.18 ata
Max Combat Power: 1.28 ata
Emergency Power: 1.3 ata and higher

Water radiators: when manually controlled, they have only two positions: fully open or fully closed.

Tail Wheel: lockable

Adjustable Trim: Horizontal Stabilizer

Pe-2 (Series 35):

Prop RPM is controlled with the existing keyboard commands.
Two gauges (one for each engine) show the current fuel mixture ratio. They can be found to the right of the gunsight on the upper panel.

Adjustable trim: pitch, roll, and yaw

Oil and water radiators can be controlled via analog or keyboard commands.

Il-2 (Model 1941):

Plane is fitted with an oxygen system

Oil and water radiators can be controlled via analog or keyboard commands.

Adjustable Trim: pitch

Tail Wheel: lockable

One control panel governs the release of both bombs and rockets, as well as one trigger on the flight stick. There is a switchboard to the right of the pilot that will move up & down when firing/releasing bombs or rockets and when setting their release mode. All keyboard commands for bombs and rockets are the same as before.

Edited January 28, 2016 by LukeFF

[6./ZG26_5tuka]

Engine values on the F-2 seem not to represent a DB601 N engine. What kind of engine is mounted (DB601Aa?)?

[LukeFF]

Engine values on the F-2 seem not to represent a DB601 N engine. What kind of engine is mounted (DB601Aa?)?

 

601N

[6./ZG26_5tuka]

It's wrong than.

[bivalov]

it is absolutely correct  - http://forum.il2sturmovik.ru/uploads/monthly_03_2014/post-532-0-78476200-1395108823.jpg

and also from 177 developer diary - http://forum.il2sturmovik.com/topic/168-developer-diary/page-3?do=findComment&comment=315273

Edited January 28, 2016 by bivalov

[6./ZG26_5tuka]

limits is absolutely correct  - http://forum.il2sturmovik.ru/uploads/monthly_03_2014/post-532-0-78476200-1395108823.jpg

http://forum.il2sturmovik.com/topic/168-developer-diary/page-3?do=findComment&comment=315273

Do you have that whole manual? Would be important to check it myself especially from when it is.

 

Fact is the values in the OP are wrong. The DB601N could sustain 1.42ata like any other german engine of the time.

 

Operation values should be*:

 

Höchstzulässige Dauerleistung:  1.15 ata @ 2300 RPM

(max continues power)

 

Steig und Kampfleistung:            1.3 ata @ 2400 RPM       (30min)

(climb and combat power)

 

Erhöhte Kampfleistung:               1.35ata @ 2600 RPM    (3min as stated by biavlovs manual extract)

(increased combat power)

 

Start und Notleistung                   1.42ata @ 2700 RPM   (1min)

(Takeoff and emergency power)

 

* the "Kennblatt" ercerp I posted states in the bottom column, that "Kampfleistung" had been temporarily reduced to 1.25ata and "Start und Notleitsung" to 1.35ata, hence why a comparison of release dates is important.

[bivalov]

Do you have that whole manual? Would be important to check it myself especially from when it is.

no, source was mentioned exactly on scan

 

Fact is the values in the OP are wrong.

it is really DB 601 N limits, but according to techno chat

 

The DB601N could sustain 1.42ata like any other german engine of the time.

 

Operation values should be*:

 

Höchstzulässige Dauerleistung:  1.15 ata @ 2300 RPM

(max continues power)

 

Erhöhte Kampfleistung:               1.35ata @ 2600 RPM    (3min as stated by biavlovs manual extract)

(increased combat power)

 

Start und Notleistung                   1.42ata @ 2700 RPM   (1min)

(Takeoff and emergency power)

 

* the "Kennblatt" ercerp I posted states in the bottom column, that "Kampfleistung" had been temporarily reduced to 1.25ata and "Start und Notleitsung" to 1.35ata, hence why a comparison of release dates is important.

 

 

it is just for overall picture:

 

1) 1 min. 1175 PS - http://kurfurst.org/Engine/DB60x/DB601_datasheets_N.html

 

2) 1 min. SuN with "in-genious..... clockwork device" (pages 368-369) - http://kurfurst.org/Engine/DB60x/files/Flight_16April1942_DB601N_Engine.pdf

 

 

 

and concrete documents about Bf 109 F-2 and DB 601 N:

 

 

1) Bf 109 F-2 with 3 min. 1.42/2600 (Mai 1941) - http://forum.il2sturmovik.ru/uploads/monthly_03_2014/post-532-0-71768500-1395108710.png

 

2) DB 601 N with 1.35/2600 (dated 12.11.40, 16.5.41, 15.7.41 and 15.6.42) - http://forum.il2sturmovik.ru/uploads/monthly_10_2015/post-17024-0-14501100-1444228812.jpg + http://forum.il2sturmovik.ru/uploads/monthly_10_2015/post-17024-0-39715600-1444231670.jpg

 

3) Bf 109 F-1/F-2 with 3 min. 1.42/2600 > 1.35/2600 (27 October 1941) - http://www.avia-it.com/act/profili_daerei/libretti_velivolo/PA_libretti_tedeschi_PDF/Kennblatt%20fur%20das%20Flugzeugmuster%20Bf%20109%20Baureihe%20F-1%20und%20F-2%20motor.pdf + http://forum.il2sturmovik.com/topic/4708-open-oil-radiator-flaps-109/page-3?do=findComment&comment=107651

 

4) DB 601 A/N with 2600 > 2800 rpm - "...by July 1941 the latest, up to 2800 rpm is possible above rated altitude....... Furthermore the increased RPM was by now obtainable with automatic RPM control (i.e. the automatic propeller pitch control or "Verstellautomatik")" - http://kurfurst.org/Engine/DB60x/DB601_datasheets_A1.html + http://kurfurst.org/Engine/Boostclearances/DB601_RPM_increase.html

 

5) Bf 109 F-2 with 3 min. 1.35/2600 + kurzzeitig vollgas/2800 (Februar 1942) - http://forum.il2sturmovik.ru/uploads/monthly_03_2014/post-532-0-78476200-1395108823.jpg

 

6) 3 min. 1.35/2600 + 1.42/2800 in soviet technical description of Bf 109 E, F-2, and F-4/Z

 

7) several new interesting facts about Bf 109 E/F and DB 601 N - http://theairtacticalassaultgroup.com/forum/showthread.php?t=8483&p=213613&viewfull=1#post213613

 

 

so, it is why in BoM (autumn 1941 - spring 1942) was modeled exactly Bf 109 F-2 with 3 min. 1.35/2600 + 1 min. 1.42/2800.

Edited January 29, 2016 by bivalov

[6./ZG26_5tuka]

Thanks for your links biavlov, some good materials in there. As suspected most documents stating 1.25 combat and 1.35 emergency rating are from early 1941 and prior.

 

I've run a brief test ingame and am glad that everything is working properly, means:

 

Dauerleistung         -         1.15 ata   -   continously

Kampfleistung         -         1.3  ata   -   30min

Erhöhte Kampfleitsung   - 1.35 ata   -   3min (got "emergency mode expirienced" message after 2'15, engine didn't suffer damage though)

Start und Notleistung     - 1.42 ata    -   1min (boost won't cut off after 1min, automatic boost device is not implemented)

 

Only thing that I noticed was that at 1.3 ata the engine keeps 2500 RPM. All manuals threwout mention 2400 RPM for 1.3 ata (and 1.25 ata).