[REL] 4.11.1 Official Release

[150GCT_Italo]

Thank you. Great work!

[ECV56_etendar]

Muchas gracias, un gran trabajo.

[Snake]

Originally Posted by Whacker

Check in your IL2 4.11.1 installed folder for a file called "Temp_Guide_4111.pdf".

Got it! Thanks a lot!

[Asheshouse]

A great patch. Thanks.
I am now re-educated on over-heatings problems and cures.

[Whacker]

On that note... Questions/guidance requested from the Team D boys.

The new temp guide specifics a few temps that I know are somewhat low, as I have several aircraft pilot manuals. The temp guide itself, towards the bottom where the list is, states that "figure represents maximum permitted [...] (Cylinder head temperature for radial engines)". I know for a fact the Wasp 2800-xx powered F4U-1's and F6F's have max. permitted cyl. head temps of 260 C as per the documentation. The game guide shows max temp as 230 C.

So, I guess the questions are, is the code written such that engine damage immediately starts and continues to build up after the 230 limit is reached, or is there a "grace period" where one can attempt to bring the temps back down? Can we change this in a future patch revision? I can supply the references if needed.

Thanks guys!

[JtD]

230 is the maximum continuous limit. For in game workings, it is better to go with this lower limit. Below that limit, no damage occurs, you go higher, there'll immediately be a small chance for damage, higher, the higher the temperature gets. At 240 degrees, while there's no guarantee for it, you'll likely run out of fuel before the engine gets damaged. At 300, you might lose it any minute.

[Whacker]

Not in the F6F. According to this manual scan, 260 is the max. op temp for normal continuous, no limit. The F4U-1 variants list 260 max temp for military power operation, says 30 min max duration. The P-47D manual does say 232 is max continuous, 260 allowable for max 5 min.

Edit -

Bearcat manual also says 260 permissible for 1 hour, I know it's not in game though.

Edit 2 -

Looks like the two main differentiators are oil temp and MAP. In most of the cases, the settings between normal cont. and mil. power are minimal, but allow for higher MAP and max oil temp ranges. Oil temp makes the most sense to me, old WW2 era lube oil was pretty crappy and sludged up often, esp. under high temps.

[Robo.]

Originally Posted by Whacker

Not in the F6F. According to this manual scan, 260 is the max. op temp for normal continuous, no limit. The F4U-1 variants list 260 max temp for military power operation, says 30 min max duration. The P-47D manual does say 232 is max continuous, 260 allowable for max 5 min.

Edit -

Bearcat manual also says 260 permissible for 1 hour, I know it's not in game though.

Edit 2 -

Looks like the two main differentiators are oil temp and MAP. In most of the cases, the settings between normal cont. and mil. power are minimal, but allow for higher MAP and max oil temp ranges. Oil temp makes the most sense to me, old WW2 era lube oil was pretty crappy and sludged up often, esp. under high temps.

Hi Whacker, the temperature limits for American P&W engines are fairly accurate in 4.11.1. It is quite difficult to model all powers and limits in their complexity hence the 232°C is set as maximum permittable continuos setting. Everything else is considered as overload condition and has got some time limits or other relevant limitations like RPM and MAP - let me explain:

Looking at the F4U manuals:

Max rich continuous: 2550RPM @ 44'' / 230°C cht and 85°C oil
(you can use this settings in the sim and stay within limits easily pretty much forever)

Max climbing (1 hour limit) - same setting as above, 2550RPM @ 44''(49.5'' depending on blower seting), temp limit is 260°C cht and 100°C oil, but it is possible to stay within game's limit. The game does not recognise continuous limit and temporary limit. The important point is that the performance is correct and it is possible to use these settings without overheating and fly her by the book. This can be considered as compromise but on the other hand, having continuos limit set at 260°C would be both wrong and unnecessary. The temperature in game will stay within limits at given settings anyway.

Both combat and combat emergency ratings are limited to 5 minutes. Combat being at 2700RPM / 53'' and 260°C / 100°C. Depending on your initial temperature you would certainly overheat and damage your engine at full power. This is the game's limitation and as JtD says, it is indeed better this way. As for the actual temperature - I have not tested this yet but I'd guess you will have trouble with oil limit rather than CHT at the combat settings anyway. In the normal game situation, you can use full power for some amount of time, but soon you have to start thinking about cooling. Pretty much like the 5 minute limit (which was bound to temperatures as well as to MAP / RPM settings).

(above figures from British manual 2351A,B,C and D)

[Bearcat]

Thanks for the patch guys.

[beta4good]

Thank you, guys, for your hard work and dedication!