[REL] 4.11.1 Official Release

[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)