The A2A Simulations Community

Hey guys, having an absolute blast with this airplane. Just curious if there could be an option for pre-heated oil on the loadout manager ala the P-47 for a future patch.

Cheers
TJ

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"The knack of flying is learning how to throw yourself at the ground and miss." - Douglas Adams

There really isn't an "option" for pre-heated oil per say. Usually if you refill the oil container from the load manager it refills it to an acceptable temperature. It was the same way on the B377. You would just click the oil reservior from the load manager to fill the oil tank with warm oil, and then cycle it through all the engines to warm them up. I imagine if you did this on the P-40 it would do the same thing. I just purchased and downloaded it, so hope to find out myself. Granted I rarely ever use the oil heat option unless I really really really need it in the other birds.

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S Jordan
Milviz Staff Member
AM; United States Navy
FSX Hours: 2000 and counting

We've thought about this, especially from memories of using an electric oil heater in my old Piper. This could be something that comes in down the road, but we just have to make sure it fits in with everything.

Scott.

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A2A Simulations Inc.

What about Oil dilution. The manual is a bit quite about this. Yesterday I landed on an airfield with -2 °C OAT.

After taxiing I switched on the oil dilution. Within 3 minutes I couldn't notice any drop in oil pressure. On the B-17G you can see the drop in oil pressure in a shorter period of time.
Could it be, that the oil temperature war still to high with 65 °C, so that the fuel in the oil vapourized and burned off?
I'll give it another try with less oil temperature while diluting the oil.

Maybe someone can check this too.

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"Give me a ping, Vasili. One ping only, please."

While th A2A accusim P-40 is really nice, the manual is a bit lacking.
Missing some explantions for using carb heater, wobble pump, oil dilution etc. on the P-40.
The Accusim manual is more a general explanation on how engines and such works.

FinnJ

Just tried to dilute with a lower oil temperature. Nothing happend. No drop in oil pressure.

OAT -3° C, oil temp was at around 45°C, RPM at around 1000, oil pressure stayed at around 36 psi. The dilution switch was on 3 to 4 minutes.

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"Give me a ping, Vasili. One ping only, please."

That is because the oil is likely too hot. If the oil temp is over say 70 deg, the fuel evaporates. You literally sometimes have to shut the engine down, wait for it to cool, start it up, dilute, shut down.

If you start a very cold engine (say, 10 deg F), you will notice very high oil pressure. You can also use oil dilution then to thin the oil out and bring the pressure down quicker. Then as the oil temp rises, the fuel will burn off.

Scott.

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A2A Simulations Inc.

I have had no issues starting. One cranky start on the first flight as I didn't have the throttle cracked enough, but she starts great, even at cold temps I give it a nice long warmup to 40C oil temp at 1000RPM. I have never had cooling problems either, even after doing numerous touch n gos/land-taxi back using slighly above redline power settings in some short field TO instances.

Scott was very right about this engine being rugged.

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"The knack of flying is learning how to throw yourself at the ground and miss." - Douglas Adams

70 deg in which measurement unit?

So 70°F means around 21°C and 70°C means 158°F (I'm not used to deal with Fahrenheit or inch or pounds here in Germany Metric system for all! ).

I'll give it another try in the evening, thick oil and low outside temps

In the B-17G it works fine with oil temps at around 50°C.

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"Give me a ping, Vasili. One ping only, please."

Typically, when you're referring to something on an airplane, you reference the gauge markings, not necessarily the scale of measure. Thus, when Scott says "70 degrees", he means 70 degrees on the oil temp gauge, whatever scale that may be in.

Interestingly enough, even back in WWII, many airplanes used *C for most engine readouts (oil temp, water temp, CHT, EGT, etc) regardless of what country they were from and the fact that Metric was not at all a "preferred" unit of measure for any of the Allied countries.

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So, oil dilution works.

I think the A2A P-40B or C are a little different from this manual:
P-40 manual
On page 21 you can read: "...hold the dilution switch on for at least 4 minutes or until the oil pressure drops to 15 psi."
The described versions (D and onwards) also have a fuel booster pump, which we do not have.

With OAT -12°C and normal oil I had a startup oil pressure at around 120 psi. With the dilution I could bring it down to around 33 psi at 800 to 1000 rpm and oil temp -5 °C after a short period of time. But the oil pressure never went below 30 psi even the dilution switch was on.

Jens

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"Give me a ping, Vasili. One ping only, please."

Which was the preferred method, diluting before putting the plane away or diluting after startup?

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Definitely before shutting down, because cranking the cold, thick oil can be a problem.

Scott.

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A2A Simulations Inc.

Ah, that makes sense, thanks Scott.

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