How to change manifold pressure?

[Cybermat47]

I keep having a problem in the P-40. No matter how low my RPM is, the manifold pressure always remains at the maximum setting, which results in my engine dying. How do I change manifold pressure?

[Felix58]

set rpm 2600.

adjust prop pitch.

Temps Water 80-120

Oil 40-88

[HotPursuit]

It's the throttle position that controls the manifold pressure. Pull your throttle back to set desired manifold pressure. You can't fly the P-40 for long with the throttle shoved all the way forward!

 

The engine rpm is controlled by the propeller pitch. In the P-40 leave the propeller electrical switch in the upper 'auto' position. That way it will act as a constant speed prop and you can set your desired rpm with the propeller control lever on your left.

[Cybermat47]

set rpm 2600.

adjust prop pitch.

Temps Water 80-120

Oil 40-88

It's the throttle position that controls the manifold pressure. Pull your throttle back to set desired manifold pressure. You can't fly the P-40 for long with the throttle shoved all the way forward!

 

The engine rpm is controlled by the propeller pitch. In the P-40 leave the propeller electrical switch in the upper 'auto' position. That way it will act as a constant speed prop and you can set your desired rpm with the propeller control lever on your left.

Thanks guys

 

I've found that 70% throttle and 70% RPM makes for good continuous use, while 70% throttle and 100% RPM is good for combat.

[Matt]

Don't forget that the P-40 doesn't have an a automatic regulator, so using one throttle position doesn't work well because your manifold pressure will decrease when climbing and increase when diving.

 

Overall, with 100 % RPM you'll quickly run into the emergency power time limit, I prefer leaving the RPM at around 2800 and adjusting manifold pressure depending on what I need.

 

Handling the engine in the P-40 is quite tricky overall.

[Cybermat47]

Don't forget that the P-40 doesn't have an a automatic regulator, so using one throttle position doesn't work well because your manifold pressure will decrease when climbing and increase when diving.

 

Yep, I've noticed that too. Thanks for the heads up