Mixture, Supercharger and Prop Angle setting?

[DrDetroit]

Hi guys,

When do I move the supercharger handle (in between the throttle and mixture lever) from full forward to middle position?  I notice that sometimes, when put into mid position, the RPMs increase, and then decrease when pushed forward - this is not always the case, it seems. Other times, that lever seems to not have the same effect.

Same question for mixture lever; is it always forward?  Do I use the middle position for cruising at altitude or something?

One more question; prop angle.  The lever is down for most flight, for the blades most bite - should I move the lever up when at higher altitudes for cruising and gas savings?

Never really messed with warbirds, my go to is the F-16.  So not sure when/what situations these settings should be adjusted. 

Thanks and good day,

DrDetroit

 

[PL_Harpoon]

null

From real F4U manual.

Blower and Mixture are the columns you're interested in.

[felixx75]

1 hour ago, PL_Harpoon said:

null

From real F4U manual.

Blower and Mixture are the columns you're interested in.

Sry, that's the wrong one. This is the version without water injection.

This is the right one:

 

[DrDetroit]

@felixx75

Thanks buddy, this is great!  

Is auto mix the full forward position, and auto lean middle posit?  

How about the blower handle, which is low and which is neutral?  Hard to read the labels with the wear and tear .

Thanks again!

[felixx75]

20 minutes ago, DrDetroit said:

@felixx75

Thanks buddy, this is great!  

Is auto mix the full forward position, and auto lean middle posit?  

How about the blower handle, which is low and which is neutral?  Hard to read the labels with the wear and tear .

Thanks again!

Full forward -> Auto Rich

Middle-> Auto Lean

[AG-51_Razor]

The SC handle full forward = Neutral

Middle position = Low Blower

Aft position = High Blower.

[Firebugs]

There's a chart on the left side of the cockpit wall also.  Can be dark/hard to see, though. 

[felixx75]

28 minutes ago, Firebugs said:

There's a chart on the left side of the cockpit wall also.  Can be dark/hard to see, though. 

This plate is almost certainly the wrong one, as it shows the data and the designation for the engine without water injection. But since we have an f4u-1d, our engine has water injection. Therefore, the table I posted above should be the correct one.

 

[GTFreeFlyer]

As you climb, the air gets thinner. You’ll start to notice your manifold pressure (MP) dropping, so you’ll increase the throttle lever to maintain.  At some point, you will hit 100% throttle just to maintain your MP.  If you climb higher than this altitude, you will not be able to maintain the MP, so this is when you kick on the first stage of the blower.  Your MP will start to increase and now you can throttle back to your desired MP.  
 

Continuing to climb?  Well, just repeat and go into the 2nd stage of the blower when needed to boost the MP further.  
 

Note that when you kick on the blower, your carb temperature will rise, so this is what the intercooler is for.  No need to open the intercooler when not using the blower. 
 

Hope that helps understand the mechanics in play.