Sound does not reflect changes in manifold pressure

[rudi0310]

Sorry for the tons of new threads today,

but I think it is easier to handle when divided it into several threads.

The engine/prob sounds are great, congrats!

There is one point, the engine sound does not change when manifold pressure is changed (prop rpm change works fine). It confuses me somewhat not to get an audible feedback when I change MP. This is no major issue, if it is possible to fix that without deecreasing the overall sound quality, it yould be aprreciated.

This is the last thread so far. Cheers - Rudi

[Krazycolin]

It's not supposed to.

Constant speed prop.

[rudi0310]

I know. But wear and tear on the engine changes. I can live with that very minor simplification, no problem.
Greets Rudi

[Krazycolin]

We do not provide for wear and tear on the engines. The mechanic is on call 24/7 and looks over the plane as soon as the engines are cold.

[rudi0310]

[70Nlights]

This makes no sense to my simple mind. I am not a pilot, but I have worked with governors and understand the principal of a constant speed propeller.

On takeoff climb, the manifold pressure is 28.5, RPM are 2700, and fuel consumption is 150 pounds per hour.

At level flight, I set the manifold pressure to 20. RPM stays at 2700, (I totally understand why) but fuel consumption drops to 100 pounds per hour.

Each time the spark plugs fire, there is an explosion in the combustion chambers. At fuel consumption 100 versus 150, there are smaller explosions and smaller explosions should result in less noise.

So why is the noise level the same?

[Krazycolin]

The sound is correct for this bird.

If you wish to get a lesson in why, this isn't the place. Sorry.

Please ask this question in the general area and perhaps someone will answer you.

[shivers9]

This makes no sense to my simple mind. I am not a pilot, but I have worked with governors and understand the principal of a constant speed propeller.

On takeoff climb, the manifold pressure is 28.5, RPM are 2700, and fuel consumption is 150 pounds per hour.

At level flight, I set the manifold pressure to 20. RPM stays at 2700, (I totally understand why) but fuel consumption drops to 100 pounds per hour.

Each time the spark plugs fire, there is an explosion in the combustion chambers. At fuel consumption 100 versus 150, there are smaller explosions and smaller explosions should result in less noise.

So why is the noise level the same?

This sound thing is hard to get use to but if you look around on Youtube at some of the cockpit Video for C310 landings you will hear and see that this version of the sound is dead on. It works just as they have it. Look close on you will see a couple of different techniques like if able one guy pulls the throttle way back and moves the Props full forward and then adds back throttle as needed. But as the man said it is done right in the Redux.

[Les Parson]

"...one guy pulls the throttle way back and moves the Props full forward and then adds back throttle as needed..."[

Could you post the link for the video you reference?

[Krazycolin]

Please take this elsewhere...