Question about engine sounds.

[AKHog]

This isn't a game play issue or major complaint but has been bothering be for some time.

Why does the engine sound change (in pitch) when changing manifold pressure the same as changing RPM? If I pull back on throttle which reduces manifold pressure in game, shouldn't it sound different than reducing rpms?

This leads me to a 2nd question, in WW2 dog fighting was it normal to have the rpm set to full and use only manifold pressure while maneuvering? Wouldn't there be problems with overspeeding the prop? At high speeds wouldn't it be better to have lower rpm settings? I notice it is not like this in the game. Only when my engine goes out or when I'm conserving fuel do I worry about manifold pressure AND rpm.

[Sgtlead]

Ur makin me think Hog.  now my head hurts    And I dont have the answer.  <S>

[IronDog]

I'm thinking that the WW2 pilot that was in a dogfight wasn't trying to trick out manifold pressure,he was working the throttle and trying to get a gun solution on his opponent.Several books I've read,mention the pilots putting the throttle thru the stops....WEP.Air Warrior modeled prop overspin,and a lot of players disliked it,and it was stopped.It was shortly thereafter that EA gave AW it's pink slip.I've often thought that the player based complaining about AW3,gave EA the grounds they needed  to get shed of AW.Just my 2 cents.

ID

[SectorNine50]

I've actually thought about this as well.  The engine should not change pitch when opening and closing the throttle, it should just get louder and quieter.  The only time it should change pitch is when you change the RPM's.

I never really said much about it on the forums due to the fact that the sound engine in this game is pretty old and on the list of things to revamp, figured they'd touch on that when they fixed it as a whole.

[kvuo75]

here a couple articles from the real world that explain MP / RPM

manifold pressure:

http://www.avweb.com/news/pelican/182081-1.html


constant speed prop:

http://www.avweb.com/news/pelican/182082-1.html

[avionix]

I would think that they would have set the manifold pressure and prop piich full forward.  Just as if during takeoff when every ounce of power is needed.  Then you would just control with throttle.  Might get busy if you were trying to work pitch and manifold at the same time while trying to check your 6 and manuevering.

My .02

[AKHog]

Well I take back what I said before. Obviously the highest rpm settings are going to yield the most power so they would be the only desirable settings in a dogfight. In practice I imagine anytime you enter a fight you'd probably check that you are at full rpm then only adjust manifold pressure in the fight as needed.

I guess this leads me to another question though: did WW2 airplanes have prop governors that work like the modern day constant speed props? The modern prop governor keeps a constant rpm by adjusting blade angle as a result of airspeed or power changes. Did the ww2 airplanes work the same? If so there would be no real danger of overspeeding the prop. Also if so then in my opinion the engine sounds are modeled wrong.

[moot]

Isnt this what the fw190 Kommandogerat did? Flying Il2 with complex engine management, a couple of planes were very easy to over-rev.. e.g. one of the Hurricanes.