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IL-2 Sturmovik The famous combat flight simulator.

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  #1  
Old 09-23-2009, 12:49 AM
IvanK IvanK is offline
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Capt Stubbing you said:

"Several Planes having the ability to break Mach in a Dive. P47, Dora and Tempest come to mind…"

Are you saying these aircraft could exceed Mach 1 in a dive in Real life ? If so is there documentation to support this ?

With regards P38 compressibility are you saying its happening at too high an altitude and too low an airspeed or that it shouldn't be happening at all below 10,000 feet.
In reality it is a straight out Mach number issue with recovery G also being a variable.

Regarding P51 Wing shedding are you referring to Speed/aerodynamic affects (like air getting into the wing structure and ripping it apart) or Structural loss via Over G ?

Last edited by IvanK; 09-23-2009 at 01:33 AM.
  #2  
Old 09-23-2009, 01:35 AM
=FPS=Salsero =FPS=Salsero is offline
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One more thing.
As I have understood, 4.09 will be available for free.
Maybe you could at least set up the donations website (via PayPal would be nice).
Please consider doing so, I would rather donate 10 quid than know that there will be no more patches.

Last edited by =FPS=Salsero; 09-23-2009 at 03:33 AM.
  #3  
Old 09-23-2009, 02:27 AM
JG27CaptStubing JG27CaptStubing is offline
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Quote:
Originally Posted by IvanK View Post
Capt Stubbing you said:

"Several Planes having the ability to break Mach in a Dive. P47, Dora and Tempest come to mind…"

Are you saying these aircraft could exceed Mach 1 in a dive in Real life ? If so is there documentation to support this?
I didn't say that this is true of real life.... This is possible in the game though

Quote:
Originally Posted by IvanK View Post
With regards P38 compressibility are you saying its happening at too high an altitude and too low an airspeed or that it shouldn't be happening at all below 10,000 feet.
In reality it is a straight out Mach number issue with recovery G also being a variable.
Let me look it up but the bird any version shouldn't suffer any problems below 10k. This is old stuff but I know for sure all the 38s we have suffer way way too early in terms of speed. Again let me get some numbers put together for you. These are based on the copies of the manuals I have.

Regarding P51 Wing shedding are you referring to Speed/aerodynamic affects (like air getting into the wing structure and ripping it apart) or Structural loss via Over G ?[/QUOTE]

Yeah not talking about exceeding Vne but talking about pulling any sort of G at certain speeds will rip the wing off. This was a problem with some of the early versions but it shouldn't be an issue in the later D models
  #4  
Old 09-23-2009, 04:14 AM
IvanK IvanK is offline
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The issue with Wing shedding in the P51 in IL2 under G is that you are exceeding the 13.5G global G limit that applies to all aircraft in IL2. In the case of the P51 the in game "light" elevator lets you pull 13.5g with relative ease, more so than most aircraft hence its propensity to pull wings off. Perhaps some high speed cement is required in the P51 elevator circuit.

In reality design structural G was actually lower than that in the order of 10-12g for most US fighter types.

As to P38 compressibility issues below 10,000feet. Well its still possible if TAS is above 460MPH. P38 Operating handbook Page30 illustrates this quite clearly. Exceed 460TAS at any altitude and you re in the realm of compressibility affects in the P38.



Testing the P47,Tempest and D9 I get Mach 1.15 in all of them before bits start to separate. I think this could easily be fixed.

Last edited by IvanK; 09-23-2009 at 05:42 AM.
  #5  
Old 09-23-2009, 07:03 PM
JG27CaptStubing JG27CaptStubing is offline
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Quote:
Originally Posted by IvanK View Post
As to P38 compressibility issues below 10,000feet. Well its still possible if TAS is above 460MPH. P38 Operating handbook Page30 illustrates this quite clearly. Exceed 460TAS at any altitude and you re in the realm of compressibility affects in the P38.


Try doing some testing and you will see the compression problems start way before 420 IAS and or 460 TAS as stated in the Manual.
  #6  
Old 09-23-2009, 07:02 PM
II/JG54_Emil II/JG54_Emil is offline
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In addition to JG27CaptStubing mentionings,
guns should be corrected, Anton Fockes should have a have a historical take-off limit of 400 meters etc.
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