MW-50 question

[Mobius_cz]

I was checking the manual and i have some questions. MW-50 tank has 115l and fluid flow is about 160l/h so it is about 40 minutes of boost. My question is : Is Jumo 213 cooling system capable to cool down engine with boost for let's say more than 10 minutes? Or can you even fly with boost whole 40 minutes? This is more about real performance of the aircraft than upcomming DCS title.

[DB 605]

IIRC it was only allowed to use 4x10min periods with 5min pause between them.

[Aginor]

Continuous use will destroy the engine. So yeah, you should definitely give the engine a few minutes between using it.

[gavagai]

The tank was only filled to ~80 liters of MW50, not 115.

[MFG62 Joker]

it depends:

MW50 is cooling the engine internally.

If you use MW50 lets say with medium to moderate boost, you could use it without damage until it is empty - or until engine temperatures (oil and water) drop to low. As a matter of fact it was stated that MW50 could be used as extra cooling in any situation where necessary.

 

That´s just out of my head how I recall it. Had to look up the sources, must have been in one of many books sitting here on the shelf.:music_whistling:

The tank was only filled to ~80 liters of MW50, not 115.

says who?

Don´t get me wrong, it´s just that I never heard about that.

Edited July 12, 2014 by I./ZG15_FALKE

[Flying-Kane]

mw50 could only be used when the lever was moved to startleistung (max power setting).

the only cooling effect was over 6000m, where mw50 had no more effect on power output.

[Narushima]

Well, safely, it could be used for up to 10 minutes at a time, with 5 minute breaks for cool down in between, but I'm sure there were pilots who pushed it further. Or at least engineers on the ground.

 

Example, maximum limit for the BMW 801D at 2700 RPM/1,65 ata was 10 minutes (due to risk of overheating), but tests with this engine show that it could take far longer than that. Of 5 engines the first one died out after 45 minutes, and 3 of them made it to completion of the test in 3 hours.

The Jumo 213 J was pushed to 3700RPM, and could produce a staggering 2600PS. The 213A has some leeway. The 213A could also be pushed to 2.03 ata, increasing the power out-put by 150 hp.

 

So yeah, German engines were quite rugged and could take a punishment. American and British engines as well. Just look at what the Soviets did to the Allison when they got the P-39s. Soviet engine weren't so rugged though, with their average fighter built for 5 sorties. Japanese engines also had reliability difficulties, especially towards the end of the war.

Edited July 12, 2014 by Narushima

[SAM77]

Ki 84 sniff sniff

[gavagai]

it depends:

MW50 is cooling the engine internally.

If you use MW50 lets say with medium to moderate boost, you could use it without damage until it is empty - or until engine temperatures (oil and water) drop to low. As a matter of fact it was stated that MW50 could be used as extra cooling in any situation where necessary.

 

That´s just out of my head how I recall it. Had to look up the sources, must have been in one of many books sitting here on the shelf.:music_whistling:

 

says who?

Don´t get me wrong, it´s just that I never heard about that.

 

115L was just the standard size for the auxiliary tank. With GM-1 boost or extra fuel 115L weighs less than 115kg. With MW-50 it almost has the same density as water, so therefore you take less in order not to disrupt the CoG.