Engine management during dogfight

[miromurin]

Hi all,

how you guys operate the engine in dogfight? I mean propeller rpm control lever, mixture lever, how much time can I use water injection, do you use turbosupercharger if you fight in low altitude? 

[grafspee]

In fight i use max rpm throttle w/o and regulate boost with turbo lever.

52" MAP most of the time.

I open oil cooler 3/4

Cowl flaps closed

Intercooler neutral position, if carb temp get to 50C i drop MAP down.

 

Edited June 20, 2021 by grafspee

[Diesel_Thunder]

This handy chart should help you 

Mixture should be set for auto rich for combat to help keep the engine happy. Auto lean is meant for long range cruising. 
 

Time limit for WEP (2,750 RPM, 64” MP, and uses water injection) is 5 minutes, and your water supply (30 gallons) will last for more than that. In other words you won’t run out of water in that five minutes. You could run longer than that but you do run a high risk of engine failure if you run past the limits. 
 

Military power (2,700 RPM and 52” MP) gives you more time, 15 minutes, and does not use water. Both military power and WEP allow for a hotter cylinder head temperature, up to 260° instead of the usual 232° limit. 
 

Pick whichever power setting you deem appropriate for the fight, set the RPM accordingly, full throttle, water if needed, and use the boost lever to keep the MP in check. Full throttle at sea level on the supercharger alone will provide around 46” MP, bringing in the turbo (boost lever) provides the extra induction air to get the MP up to 64”. From there keep an eye on your temperatures, time spent at that power setting, MP, all while trying not to get shot down. 
 

Good luck!

 

[grafspee]

Full throttle at ground gives 46", in flight ram air will add MP. As far as i remember i got something above 52" at + 400mph so watch out for over boost in high speed dives.

P-47 doesn't have any boost regulator like in P-51 so constant MP monitoring is required to not blow engine

Edited June 28, 2021 by grafspee

[javelina1]

good info here, thanks gents!