Engine management in AH2

[joeblogs]

I was able to fly for the first time in several months and I wonder if there is something different about the modelling of engine settings.

It seems like dialing down the propeller setting also has an effect on MAP. Now this was true in AH1 when moving into and out of full power/WEP, but I don't recall it happening below full power. Now I observe an intermittant effect all the way down to below 1,500 RPM on the F4u-1.

Now there's all sorts of reasons why this would be true in the real world, but that is for another post.

My question is more basic. Did engine management change in some fundamental way in the game? And if so, why?

-Blogs

[Karnak]

It was changed so that fuel managment was possible in a realistic way.  Use the EB6 funtion on the clipboard and it will show your fuel consumption, fuel remaining and current flight time left.

[joeblogs]

Does anyone exactly how this works? Is the program just walking down an engine calibration chart?

-blogs

Originally posted by Karnak
It was changed so that fuel managment was possible in a realistic way.  Use the EB6 funtion on the clipboard and it will show your fuel consumption, fuel remaining and current flight time left.

[Schutt]

I like the E6B computer build in the clipboard, but i would like to see more info and some hard data as to the effect. Also it would be nice if other effects are explained in the help, its really a burdon for a starter that there are a lot of features experienced players know and starters cant know.
Does the engine cool better with lower throttle/ rpm setting?

Can you cool the engine with a idle throttle dive?

Do you loose more oil with an oil hit at higher rpms?

Also some planes definetly have a diffrent performance curve than in the help file.
There are diffrences between the planes.

Also i think there should be a way to richen or lean the mixture, manually set the radiator flaps and the chance for engine failiure.

[Karnak]

Engine failure, and other mechanical catastrophes, are already covered by random discos from the internet.

[stantond]

In my experience, an oil loss occurs at a constant rate regardless of hp output.  I interpret this as a hole in the oil tank.  Pulling g's should make this worse, but I don't believe it does.  

 For other questions, such as cooling rates under cruise conditions or when diving I recommend taking your favorite plane(s) up offline for a 15 min flight with a stop watch to answer these.  A stopwatch can also give you data on climb rates, acceleration, and turn rates!  The tables on the web sites are close, but hey... nothing is perfect!  


Notice: I have no vested interest in stop watch companies.


Regards,

Malta

[joeblogs]

Let me repeat the question - does anyone know what the program is actually trying to model? Did Pyro or Hitech ever post something about this?

-Blogs

Originally posted by joeblogs
Does anyone exactly how this works? Is the program just walking down an engine calibration chart?

-blogs

[Karnak]

The program is modeling correct fuel consumption at given throttle, RPM settings and altitudes.

Subject to universal modification by fuel multipliers for gameplay purposes.

[joeblogs]

I am happy HT looked at fuel consumption.

But I am really trying to find out if the game is automatically setting RPM and Manifold so the pilot can ignore one or the other, and if so, on what basis that is modeled.

-Blogs

Originally posted by Karnak
The program is modeling correct fuel consumption at given throttle, RPM settings and altitudes.

Subject to universal modification by fuel multipliers for gameplay purposes.

[Karnak]

The player has independant control of the manifold preasure and the RPMs.  There are some manifold preasure/RPM combos on some aircraft that are not allowed because the engine didn't work that way.

You can also see your manifold preasure change as your altitude changes and your supercharger's gears kick in and then weaken.  That is also outside of your direct control.

[joeblogs]

Do you recall if that is how it worked in AH1?

-blogs

Originally posted by Karnak
The player has independant control of the manifold preasure and the RPMs.  There are some manifold preasure/RPM combos on some aircraft that are not allowed because the engine didn't work that way.

You can also see your manifold preasure change as your altitude changes and your supercharger's gears kick in and then weaken.  That is also outside of your direct control.

[rshubert]

Originally posted by joeblogs
Do you recall if that is how it worked in AH1?

-blogs

No.  Changing prop speed had no effect on fuel consumption in AH1.  Now it does.



shubie

[Karnak]

Originally posted by joeblogs
Do you recall if that is how it worked in AH1?

-blogs

The user interface was the same, but changing RPMs had no effect on fuel consumption.

I also don't recall the manifold preasure guage reflecting altitude changes.

[hitech]

Joe blogs: Man Pressure decresses with rpm change, do to the blower /compresser running slower hence less pressure to work with. I.E. Just like the real plane does.

HiTech

[joeblogs]

Hitech-

So what you are telling me is that there is no program actively managing the engine, so it remains up to the pilot?

Did you guys enhance the relationship between RPM and the blower effect on manifold pressure? I don't remember such a striking effect below full power in AH1.

Karnak

I recall fooling around a lot with propeller RPM on the FW190 in AH1 and found I could significantly extend time on station. So I'm pretty sure AH1 modelled the effect of RPM on fuel consumption. I am less sure it modelled auto-rich vs auto-lean settings.

-Blogs

Originally posted by hitech
Joe blogs: Man Pressure decresses with rpm change, do to the blower /compresser running slower hence less pressure to work with. I.E. Just like the real plane does.

HiTech