Temperature Guide

[Marabekm]

Hello all.
I am looking for the temperature limits for all of the new aircraft added since 4.11.1. I like to fly with the annoying HUD messages turned off, but doing so means I don't get the engine overheat warning.
For all the older aircraft up to 4.11.1 we have the Temp_Guide_4111. Is there anything like this for the newer aircraft?

[Sita]

i have it but only in Russian
https://yadi.sk/i/LlJaKbEnkzch6

[Marabekm]

Thanks Sita
But I have the guide for 4.11.1. I am looking for all the aircraft added since then, such as: B5N2, B-24D, Ki-45, etc.

[Sita]

oh ... my mistake ... sorry ...

[Pursuivant]

I am looking for all the aircraft added since then, such as: B5N2, B-24D, Ki-45, etc.

Stupid question: Could the maximum operating temperatures for (some of) the new planes just be taken from data for older planes?

After all, the temperature at which an engine starts to suffer damage doesn't change if it's mounted on a different aircraft.

B5N2 = Nakajima Sakae 11 engine = also installed on the A6M2 Model 11.
B-24D & TBD Devastator = P&W R-1830 engine = also installed on the F4F.
IK-3 = Avia-built Hispano-Suiza 12Ycrs = also installed on the B-534 and the MS-406.

It looks like the Ki-45 will need new engine temperature data, though, since there's not an existing flyable plane in the game that uses the Mitsubishi Ha-102 engine.

[RPS69]

After all, the temperature at which an engine starts to suffer damage doesn't change if it's mounted on a different aircraft.


That's not necessarilly true.

We never see piston heads temperature, we see general oil temperature.

Best example of this is Fw190A2 behavior on real life.

Different airframes got diferent airflow on heat exchangers, or piston radiators on radial engines.

If the game actually made those assumptions, I don't know. But overheat condition doesn't need to be the same on every airframe that uses the same engine.

[Furio]

Stupid question: Could the maximum operating temperatures for (some of) the new planes just be taken from data for older planes?


If I understand what Pursuivant is saying, it makes sense to me. The same engine in different airframes can overheat in a shorter or longer time, depending on many variables, and can take shorter or longer time to cool off. Just think at the same M105 in the Yak or LaGG. But the critical temperature the pilot reads on the dial should be the same, I think.

[RPS69]

If I understand what Pursuivant is saying, it makes sense to me. The same engine in different airframes can overheat in a shorter or longer time, depending on many variables, and can take shorter or longer time to cool off. Just think at the same M105 in the Yak or LaGG. But the critical temperature the pilot reads on the dial should be the same, I think.

True, on the point that the pilot will get the same reading, not true that they will overheat at the same reading.

Again, you will be reading the engines oil temperature, not the cylinders head temperature. The engine could be overheating before the oil reaches x temperature, depending on the airframe.
It could be simplyfied on the game, but not on the logic afore mentioned.
They coud make as a common assumption for the overheat to happen always at the same position of the needle, but change the times it takes to reach there on different airframes.
On reality, with the same engine, and different airframes, you should have different critical readings.
Reality will be reasonably well represented, simming won't.

[Furio]

True, on the point that the pilot will get the same reading, not true that they will overheat at the same reading.

Again, you will be reading the engines oil temperature, not the cylinders head temperature. The engine could be overheating before the oil reaches x temperature, depending on the airframe.
It could be simplyfied on the game, but not on the logic afore mentioned.
They coud make as a common assumption for the overheat to happen always at the same position of the needle, but change the times it takes to reach there on different airframes.
On reality, with the same engine, and different airframes, you should have different critical readings.
Reality will be reasonably well represented, simming won't.


You need to make a decision about the level you want to push realism to. To completely monitor an engine, CHT is not enough. You need EGT (exhaust gas temperature) also. Then you need to factor low quality instruments typical of the era. Then again you need to consider that liquid cooled engines have less temperature difference between cylinders, while air cooled engines often have a critical cylinder, not to mention their vulnerability to cooling shock. The list could go on. I think that once the time-to-overheat and time-to-cool off is correctly modelled, realism is acceptable.
In my opinion, of course.

[RPS69]

I agreee, time to overheat once established it's fine to do it with the only temperatura indicator we sport on almost all planes.

I was just explaining that using the same engine as a rule to establish time to overheat, could be inaccurate, and not representative at all.

Specially for air cooled radial engines

[Pursuivant]

Good points all.

I was assuming that engine temperature sensors actually measured something like cylinder head temperature.

Measurements for oil temperature, coolant temperature, carburetor temperature a specific to the particular aircraft and don't translate between different types (sometimes not even different models of the same airplane).

And, God only knows where those sensors were placed. The same thermocouple placed at different locations within a cooling system might record very different temperatures.