How do you get the most speed out of a P-47

[BladeMeister]

Your picture shows the supercharger right on top of the turbochrger at the rear of P47. How is the supercharger driven by the double wasp engine? Looks to me that the turbocharger drives the supercharger and compressed cool air charge is fed to the carburator and then fuel air charge deliver to cylinders via intake manifolds?

 

S!Blade<><

[Raven109]

That picture is the best I could find related to the P-47, however it focuses on the turbocharger only. I just wanted to show where their position was in the fuselage.

 

You can see the actual, separate supercharger here in this cut-away of the R2800, connected to the crankshaft, on the left side.

 

 

Same can be seen in this diagram (it's the item marked 3 - internal blower):

 

The P-47 fuselage see-through diagram posted before refers to the cold part of the turbocharger as the supercharger, and the hot part as the turbine

Edited November 12, 2021 by Raven109

[LukeFF]

What's interesting is that Republic ditched the separate turbo lever at some point during the N-series production and integrated it into the throttle handle. Makes you wonder if they felt the potential inefficiency in having the two systems connected was not as bad as just having a simpler control system at all times. 

[Raven109]

1 hour ago, LukeFF said:

What's interesting is that Republic ditched the separate turbo lever at some point during the N-series production and integrated it into the throttle handle. Makes you wonder if they felt the potential inefficiency in having the two systems connected was not as bad as just having a simpler control system at all times. 

 

Yes, I think they found a way to solve this issue for later N models, rather than compromising and accepting the inefficiency.

 

5 hours ago, Knarley-Bob said:

So what of the water injection? Is that also called 'Boost'? I tried it the other day and nada. Or is that key also to the 'chargers"?

 

Water allows your engine to run at maximum boost. Without water, in most cases the engine would be damaged/destroyed at these higher boost settings. To see the maximum effects of water injection, you need to be running at 52" inHg, then press your key for "Switch engines boost: on/off".  To get to 52" set max throttle, max RPM and max turbo boost. Then engage water injection.

 

I linked 2 videos at the start of this thread, which do a good job at explaining how to use the P-47 engine controls.

Edited November 12, 2021 by Raven109

[LukeFF]

5 hours ago, Knarley-Bob said:

So what of the water injection? Is that also called 'Boost'? I tried it the other day and nada. Or is that key also to the 'chargers"?

 

Max rpm, max throttle, max turbo, and then hit the boost button. 

[BladeMeister]

3. Internal Blower

13. Turbo Compressor

16.Turbine Wheel.

Got it!

EDIT: Now I can see the parasitic Hp reduction from the physical gearing of the Internal Blower from the crankshaft. This is what I was not understanding or seeing in the diagrams before. Thank you.

 

S!Blade<><

Edited November 12, 2021 by BladeMeister

[Raven109]

15 minutes ago, BladeMeister said:

3. Internal Blower

13. Turbo Compressor

16.Turbine Wheel.

Got it!

 

S!Blade<><

 

Yes... well, the names have changed since then. However the concepts are still the same. In the US you might call it a supercharger, in the EU it might be called a compressor, while in the UK it might be called a blower.... What was called a turbo-supercharger, is now called a turbo, at least colloquially.

 

Just to make it simple. The P-47 (B-17/24) had both an exhaust driven supercharger and a mechanically driven supercharger. The former was in the tail of the P-47, while the latter was in the nose, right behind the engine.

 

Perhaps this diagram makes more sense (the internal supercharger is the mechanically driven supercharger I keep talking about; the turbosupercharger+the compressor together make up what is colloquially known as the turbo in today's automotive industry)

 

Edited November 12, 2021 by Raven109

[Guster]

Intrigued by this discussion I tried a few skirmishes in the Jug last night. Actually I don't think it handles that badly.

 

As long as you're careful with the WEP and smooth on the controls, you can put up a good fight against the FWs. You just need to think a few moves ahead all the time, preserve energy and generally take the fight into the vertical. The 109s are hard to beat down low but definitely manageable at altitude.

 

Of course this was against the AI and I can imagine I'd be in trouble against pretty much any type of plane online versus most human players, but these fights tend to take place out of the Jugs comfort zone. Once you're up high, get the supercharger kicking and all those .50s pointed the right place, it's a beast. I'd say patience and smoothness are the keys to success, and it's quite a lot of fun once you get the hang of it. It's like a dogfight in slow motion and really a thinking man's game.

Edited November 17, 2021 by Guster

[jollyjack]

On 11/12/2021 at 9:02 PM, LukeFF said:

Max rpm, max throttle, max turbo, and then hit the boost button. 

 

We need some booster jet engine add-on option; i keep hitting the deck with this beast. 

[BlitzPig_EL]

Fighting in the P47 is more akin to fighting the F86 vs. the Mig 15.