View Full Version : R2800 radial en V1650 inline overheat tests en weird finding

12-13-2005, 07:21 AM
Plane CylTemp Oil Out
F4U-1D 215*C *
P47D-10 215*C *
P47D 44 215*C *
F6F-5 44 215*C *

P15B 115*C 125*C
P51C 115*C 125*C
P51D-5NT 115*C 125*C
P51D-20NA 115*C 125*C
MustangIII 115*C 125*C

* The temp of Oil Out will not reach 125*C so I do not know if it will also overheat at that temp
The radial engine CylTemp is only controlled by the powersetting. WEP will overheat the engine; 98% en lower will cool the cylinders. The rediator(cowl flaps) do not cool the cylinders‚‚ā¨¬¶..Thats weird right?
The radial engine Oil Out temp is controlled by speed, cowl flaps setting and rpm. The engine wont overheat. Oil Out nevers gets over 125*C
Also, the oil does not seem to cool the cylinders.
Conclusion: cowl flaps are useless, they do nothing to cool the engine. I think this is a bug in the USA Radial engine model. Cowlflaps should give better cylinder cooling or the oil should cool the cylinders.

The inline engines overheat when the oil goes over 125*C and/or the cylinders get hotter than 115*C
115*C seems it bit low to me. I think the cylinders of my car even get hotter than that.
Cylinder temp is only effected by the powersetting again. WEP will overheat your engine no matter what you do. Radiators do not have any effect.
The radiator only cools the oil. I have not been able to get the temp of the oil low enough to cool the cylinders with it.
Also found that RPM effects the oil temp.

Will do some more testing on these to engines and other planes. Maybe it is a bug, maybe it is not....

12-13-2005, 09:45 AM
Remember that these planes rely on 1940s internal combustion engines without some exotic additives we have in our fuel today.

By the way, why does everyon over-heat their engines anyway? What happens when your engine is too pooped to get awau from that Gladiator?

12-13-2005, 11:45 AM
I keep seeing these posts about troubles with overheating http://forums.ubi.com/images/smilies/blink.gif I haven't ever had any probs with keeping my engine temps in the "safe" area.I often hear people site the F4U/Corsair as having serious probs in this area,yet I never seem to have trouble getting it to cool down in a respectable amount of time http://forums.ubi.com/images/smilies/16x16_smiley-surprised.gif...Maybe people should learn to work the throttle better,as overheating engines should be the least of ones probs.It's the easiest part of engine management to understand http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

12-13-2005, 11:52 AM
Cooling down the engine is no problem at all. Never was. I am just interested on how the engine overheat works in the game.
What i found is that oil does not seem to keep the engine cool(I think it should at least help) and that the cowlflaps on R2800 engine planes are totally useless. Opening tham does not cool the engine faster than keeping them close.