P-47D28 throttle-propeller interconnection issue

[bycomet]

I found the throttle-propeller interconnection lever only set a lower limit for the propeller. When they are interconnected, I move throttle forward, propeller moves together, but I can still manually move propeller in the range from current throttle position to its maximum position. And if I move throttle backward, propeller will be left in front even it says interconnected.

 

The  throttle-turbo interconnection lever has no such issue, when interconnected, throttle and turbo move together in both directions and the turbo lever cannot be manually moved.

 

I'm not sure if I'm doing something wrong or there's a bug.

Edited April 23, 2023 by bycomet

[RyanR]

This is correct. If you zoom in on the throttle quadrant, you can see that (unlike the turbo lever) the throttle interlock can only push the prop lever forward.

 

I never interlock the prop. In combat, the plane is pretty cheerful at 84% RPM with the throttle and turbo and mixture up to 100%.

 

-Ryan

[LukeFF]

1 hour ago, RyanR said:

This is correct. If you zoom in on the throttle quadrant, you can see that (unlike the turbo lever) the throttle interlock can only push the prop lever forward.

 

I never interlock the prop. In combat, the plane is pretty cheerful at 84% RPM with the throttle and turbo and mixture up to 100%.

 

-Ryan

 

You're wasting fuel and not gaining anything meaningful by running the mixture at Full Rich.

[RyanR]

1 hour ago, LukeFF said:

 

You're wasting fuel and not gaining anything meaningful by running the mixture at Full Rich.

 

At full combat power, maneuvering with high ambient temps, full-rich actually helps keep the engine temps in check. Otherwise, its auto-lean/auto-rich for cruising.

-Ryan

[Jaegermeister]

2 hours ago, bycomet said:

I found the throttle-propeller interconnection lever only set a lower limit for the propeller. When they are interconnected, I move throttle forward, propeller moves together, but I can still manually move propeller in the range from current throttle position to its maximum position. And if I move throttle backward, propeller will be left in front even it says interconnected.

 

The  throttle-turbo interconnection lever has no such issue, when interconnected, throttle and turbo move together in both directions and the turbo lever cannot be manually moved.

 

I'm not sure if I'm doing something wrong or there's a bug.

 

That's how it is supposed to work.

 

The interconnection moves turbo pressure up and down with increased or decreased fuel flow. The RPM should not be left at a lower setting when increasing manifold pressure with turbo boost or you will get detonation in the intake and blow your intake manifolds apart. You can reduce fuel and turbo pressure and then reduce rpm afterwards with no problem.

 

1 hour ago, LukeFF said:

 

You're wasting fuel and not gaining anything meaningful by running the mixture at Full Rich.

 

In reality that would also foul your spark plugs, increasing the risk of engine failure. I don't know if that's modeled.

 

Edited April 23, 2023 by Jaegermeister

[BlitzPig_EL]

It doesn't cause any running issues in the sim to run it as described.  I have tried it, and it almost makes the P47 worth flying in the air to air role, almost.

[Charon]

3 hours ago, Jaegermeister said:

The RPM should not be left at a lower setting when increasing manifold pressure with turbo boost or you will get detonation in the intake and blow your intake manifolds apart.

 

Not in the intake. Detonation occurs in the cylinder itself and results in peak pressure occurring too early, which manifests in rapid run-away overheating until something, often the piston itself, melts. However, this is not modeled in game.