P-47D-22 Oil Pressure

[kill_devil_91]

I'm not sure if it's a bug or if it's something that I'm doing incorrectly, but I get crazy oil pressure that lead to oil system failure and eventually engine failure in the P-47D-22. Just taxiing to the runway, I get pressures that exceed 100 psi, and oil system failure whenever I try to take off. I've tried adjusting rpm, throttle, turbo, outlet and intercoolers, shutters and switching between 150-octane fuel. Can't seem to figure it out. Anyone else having these issues?

[RedKestrel]

2 minutes ago, kill_devil_91 said:

I'm not sure if it's a bug or if it's something that I'm doing incorrectly, but I get crazy oil pressure that lead to oil system failure and eventually engine failure in the P-47D-22. Just taxiing to the runway, I get pressures that exceed 100 psi, and oil system failure whenever I try to take off. I've tried adjusting rpm, throttle, turbo, outlet and intercoolers, shutters and switching between 150-octane fuel. Can't seem to figure it out. Anyone else having these issues?

I've never even paid attention to the oil pressure. Never had a problem like that in the D-22 or D-28. 

I've found its relatively easy to exceed the oil temperature limits if you are climbing at low speed at higher power settings. On takeoff I set my oil cooler to fully open, and leave it there when climbing, to avoid overheating. Even if its fully open, climbing at the best climb speed at combat power will cause it to overheat relatively quickly on hot maps. It's much worse with the 150 octane fuel because of the higher MP. Opening the cowl shutters helps keep the oil cooler as well since the entire engine stays cooler, but unless I am climbing at high settings on a hot map I do not open my cowl shutters.

 

In level flight I set the oil coolers to neutral, and in winter maps I close it entirely.

 

Basically you should be able to run the P-47 at neutral intercooler and oil cooler shutters and closed outlet cowling all day as long as you keep your speed up.

[kill_devil_91]

All of my temps are actually very low because I'm starting cold. Another weird thing is that it will leak oil all over my canopy shield, even as I'm taxiing to the run way. None of these problems with the D-28 however. It must be a bug...

[RedKestrel]

7 minutes ago, kill_devil_91 said:

All of my temps are actually very low because I'm starting cold. Another weird thing is that it will leak oil all over my canopy shield, even as I'm taxiing to the run way. None of these problems with the D-28 however. It must be a bug...

If you damage your engine by exceeding its limits, it will sometimes put oil over your windshield. But it should not be doing that all the time, least of all when taxiing.

 

I recommend that you start a quick mission on the ground in the P-47, and record a track of your startup and takeoff procedure. For the mission, turn off all ground targets, air targets, everything, to minimize the size of the track file any any other factors that might influence it. 

You might want to try it with other planes to see if you get any odd behaviour. Do you just have BoN or do you have other planes as well?

 

Then make a thread in the Technical Issues and Bugs part of the forum and upload and attach the track file you made of doing the taxiing. You can also add it to the stickied thread about Flight models and damage models.

I suspect you have some kind of corrupted game file or , and a reinstall might help. But before you do something drastic post it to the tech forum first, maybe there is something we are missing here. 

[Zippy-do-dar]

50 minutes ago, kill_devil_91 said:

All of my temps are actually very low because I'm starting cold. Another weird thing is that it will leak oil all over my canopy shield, even as I'm taxiing to the run way. None of these problems with the D-28 however. It must be a bug...

Are you letting the oil get to operating temp before taxiing

[ATAG_Headshot]

It could be that the engine is too cold when you taxi. Colder oil means higher pressure, and if you throttle up too quick on a cold engine it can be bad. Not sure if it's modeled here but it's something to look at. Start the engine, let it warm up, check the oil pressure before you start to taxi and make sure that it stabilizes in the normal range then go. 

 

[kill_devil_91]

I think I figured it out. My oil temp was too cool to start taxiing/take-off. I had to close all of my shutters and slowly rev my engine up by 100 rpm intervals while keeping an eye on my oil pressure, never letting it exceed 120-130ish psi. As the oil warmed, the pressure was slowly brought down to around 100 psi. This process took forever since I was playing on a winter map, and if I brought my engine to idle during taxiing, my temps would plummet again. Took a good 10 minutes or so to finally reach around 30 degrees Celsius, were oil pressure was in the green and it was safe to take off.

 

Overall, either the D-22 takes longer to warm up than the D-28, or this might be an issue for the devs to look at.

[Venturi]

When FM improvements in realism are made, to avoid pilots thinking it is a bug rather than a feature, official explanation should be provided and multiple FMs adjusted simultaneously. 

[Legioneod]

On 8/14/2020 at 5:16 PM, kill_devil_91 said:

I think I figured it out. My oil temp was too cool to start taxiing/take-off. I had to close all of my shutters and slowly rev my engine up by 100 rpm intervals while keeping an eye on my oil pressure, never letting it exceed 120-130ish psi. As the oil warmed, the pressure was slowly brought down to around 100 psi. This process took forever since I was playing on a winter map, and if I brought my engine to idle during taxiing, my temps would plummet again. Took a good 10 minutes or so to finally reach around 30 degrees Celsius, were oil pressure was in the green and it was safe to take off.

 

Overall, either the D-22 takes longer to warm up than the D-28, or this might be an issue for the devs to look at.

 

Strange, it shouldn't take any longer as far as I know. The engine setup was identical for both aircraft iirc, I'd imagine the thermal model should be similar for both aircraft.

[69th_chuter]

The manual, not just for the P-47 but for all 2800s (Corsair, Hellcat and B-26) says to hold at 1000rpm until 40° is reached with cowl flaps open and oil coolers closed.

[RedKestrel]

I think There's always been a problem with warming up cold engines in the sim - they just don't seem to generate enough heat at idle on the ground to overcome the limits in a reasonable times. I remember people having a hell of a time with it in TAW years ago with the Pe-2s. It may be a limit of the thermal model that to make it work in the air it is less accurate on the ground.

 

You can always just make sure that cold engine starts are disabled in the difficulty settings if it keeps giving you trouble.

[FlyingH]

I think all reciprocing acengines need  1000 - 1100 rpm for some minutes (depending on outside temp) of time to warm up!