P40 - engine settings

[Ken5421]

Now playing on the TAW server. Can someone please advise optimum settings for the P40 at cruise and combat? I have fried a few engines unfortunately!!

 

Ken

 

 

[sniperton]

Mixture ~66% and RPM ~70% are a good starting point, so that you only have to adjust the throttle to switch between cruise and combat.

Don't forget to close the radiator almost fully. 5 to 15% is generally fine, in hot summers the engine might require a bit more cooling, but that's all.

And trim your plane 100% nose-heavy all the time unless you're turn-fighting.

 

[Ken5421]

Many thanks for the feedback. Cheers Ken

[AKA_Relent]

Keep an eye on your manifold pressure when you need to go from continuous into combat settings.  If you keep it around 40 lbs, you can stay in combat mode for a while (~30 min) before dropping back to continuous.  However, if you push it to 45 lb or more, you can’t keep it there for long, I’m talking ~ a minute or two, then you better back off soon or she’ll fry.

[Ken5421]

ok thanks

[FeuerFliegen]

I set my RPM at 73% to get the most out of the RPM without going into combat mode.

 

Keep it just a hair under 40" manifold pressure, which will constantly be changing with altitude, and will also raise slightly with speed.

 

For takeoff with a bomb or short runway,  I do 100% RPM and keep it around 44" manifold pressure. Also you will probably need -100% (tail heavy) trim, or close to it, for when you lift up off the ground with a bomb, esp. the 500kg.

 

 

On 4/12/2020 at 7:20 PM, sniperton said:

And trim your plane 100% nose-heavy all the time unless you're turn-fighting.

 

 

I can't agree with this at all; only 100% nose heavy would if you're doing over 350 MPH, which is only going to happen in a dive or after coming out of one for a short period of time.

 

 

[Lusekofte]

Try to look at the instrument. Rpm values and manifoil pressure. Learn yourself the values together with tech chat as a controlling software. Then switch off tech chat and never again refer to settings on %. It only keep you from seeing the logic. If you do this you will see no problem operating p 40/39 and most allied planes. 

[Blackhawk_FR]

It's too bad P40 engine can't hold more than a minut its "prohibited" full power. I could reach about 530/535km/h before engine died. 

 

The manual manifold pressure (constantly changing with speed, RPM and altitude) and the engine limit make it quite complex to manage. 

 

Here are some of my tests with P40. You should do the same as soon as you're learning a new aircraft, to perfectly know your engine potential. 

39" / 2650: 451 km/h, unlimited timer.

40" / 3000: 460 km/h, engine limit exceeded after 8min30. 

42" / 3000: 471 km/h, engine limit exceeded after 4min30.

42" / 2800: 469 km/h, engine limit exceeded after 6min30.

45" / 3000: 481 km/h, engine limit exceeded after 4min30. You doesn't get more speed and time with 2800 rpm though. 

 

Keep in mind that high RPM give better acceleration (and climb) but kill engine faster. So when you dive, even slightly, or flying level at high speed, reduce RPM to save some engine timer. But keep also in mind that over 42 of manifold pressure, it's killing the engine anyway, whatever your RPM.

 

Except that engine and the poor power/weight ratio, it's a superb fighter and a joy to fly. I even managed to get 5 kills on a 1945 plane set on Combat Box