Oil temperature and other things that might kill your engine.

[reflected]

Ok, so I'm quite aware how aeroplanes work, I read through the Spitfire pilot's notes a few times, and I amnage to fly it fairly well with CEM without temp effects. However, as soon as I enable temp effects I keep killing my engine.

By opening the radiator, I can keep the rad temp below the limit, but I can't seem to influence the oil temp, which is always between 90 and 100, 90 being the limit it eventually kills my engine.

What other things can kill it?
- too much boost for too long time (enabling boost cut-out isn't a problem if I throttle back, it's just a gate, isn't it?)
- overrev (3600 is the limit for 20 seconds, and I seldom go over 3,000 I usually keep it around 2850 in combat
- rad temp - easily cured by operating the radiator shutter
- oil temp - ?
- mixture - should be automatic so no problem. when I set it to weak I'm careful not to use more than +2 boost.
- what else?

Thanks

PS: It's only the Spit, I seem to manage the 109 quite well.

[41Sqn_Banks]

The oil temperature is heavily influenced by the engines RPM.

You can climb for 30min with 2600 RPM and full throttle (+6 1/4) and your oil temperature will stay around 90°. However always keep an eye on your RPM and oil temp and reduce RPM if it exeeds 90° (with a 2-pitch propeller you have to climb steeper or reduce boost to slow down which will reduce RPM) .

[ga_332]

Dos these also mean for the bf109 Oil temp below 90 and Coolent below 120? before damage the engine.......

[reflected]

been flying around at full switch.
I can fly the 109 OK, without killing the engine.
However, no matter how carefully I keep the revs, the boost and tthe temperatures within limitations, Merlin engines die on me eventually. something is broken, it can't be that much harder?

Rad: below 120
oil: around 91 all the time
revs: 2850 for combat and climb, otherwise 2600-2400
Boost: +4, max boost in combat for short periods

What? Why?

sometimes I lose power, sometimes I get oil on the screen...if real planes were such bitches the Luftwaffe wouldn't have had to try that hard to beat the RAF...

[Viper2000]

120ºC coolant temperature = engine failure.

The cruising temperature should be 95ºC.

3000 rpm is fine for combat.

At +6¼ psi boost you need at least 2080 rpm to avoid detonation. This is important with 2 position props. You can't just change to coarse pitch at full throttle, because you're likely to go below the minimum rpm for your boost and break something. Therefore with a 2 position prop I throttle back to 0 boost before switching to coarse pitch.

Oil temperature should be 90ºC for cruising and 95ºC max.

[reflected]

Originally Posted by Viper2000

120ºC coolant temperature = engine failure.

The cruising temperature should be 95ºC.

3000 rpm is fine for combat.

At +6¼ psi boost you need at least 2080 rpm to avoid detonation. This is important with 2 position props. You can't just change to coarse pitch at full throttle, because you're likely to go below the minimum rpm for your boost and break something. Therefore with a 2 position prop I throttle back to 0 boost before switching to coarse pitch.

Oil temperature should be 90ºC for cruising and 95ºC max.

weird..I have the pilots notes, and it says 120C for 30 min, and even 135 C for 5 minutes. Good to know about the minimum rpm though, thanks! Oil temperatures are always around 95, nothing I can do...can you achieve combat performanced with these limitations? or do you just cruise and do some sightseeing?

[kimosabi]

Originally Posted by ga_332

Dos these also mean for the bf109 Oil temp below 90 and Coolent below 120? before damage the engine.......

No, in the 109 you want oil around 80-90max and also water around 90max.

[reflected]

Viper, I did some tests and it works!

If I keep the temperature below 120 the engine won't die. Unless the revs are too high, which makes the oil temp go boom. So I fight at 2850, and occasionally at 3000.

However, when I go high, above 4-5000m the oil temperature goes really high. The only was not to kill the engine is to reduce the revs to 2,300. Is that normal? Something is fishy up there, even the revs weren't constant. Perhaps the automatic mixture control is broken as some say?

[Shadylurker]

Something is definitely broken. I seriously doubt the pilot notes IRL are this close between life and death of a motor. Motors are not built out of glass and damage isn't on/off as it seems in the sim, I mean I have beat some motors IRL and yes failure is there, but thats after weeks/months of beating it (not 30 seconds as in COD). And my military background with modern aircraft tells me, yes 30min full power NEEDS to be followed but in all reality it could probably go well past that time as long as all gauges stay out of the red. Yes apples and oranges but I Seriously doubt they would run that close to the edge w/ no chance for over rev / boost / ect. maybe the actual "gasoline" model is wrong in the game. with the right octane anything is possible.

[zoopyzook]

Might be interesting reading for you, from the actual Spitfire IIA and IIB pilots notes regarding limitations on the Merlin XII engine...