MW50 -Secondary effects were cooling of the engine .

[Whacker]

Originally Posted by Shardur

The combustion chambers in an engine are the main source of heat, so cooling them will in turn actually cool the entire engine.

There was a question raised somewhere earlier if the MW50 actually raises engine power:
as per http://kurfurst.org/Engine/DB60x/DB6...sheets_DB.html

On the DB-605DB
At 0km altitude usable power is 1430hp without and 1850hp with MW50 (+-2,5%).
At 6km altitude usable power is 1285hp without and 1600hp with MW50 (+-2,5%).
(1800hp at 0km or 1550hp at 6km can also be gained by using better C-3 fuel and no MW50 instead of the lower grade B-4 fuel + MW50)

The DB-605DC engine that is optimized for C-3 fuel generates 2000hp at 0km with the MW50 active and 1800hp at 4.9km. (+-2,5%)

As an engineering student I can also say that systems that worked in the 40s work the same way today and are usually just optimized. We can't change the physical or chemical bases the systems work on, we can only fine tune the systems to take more effect.

Looking at the 109 and its role as a short range interceptor that tried to save wight wherever it could it is highly unlikely that someone would put a 23min tank on it, if it was not possible to use it.

You need to stop this, because you're doing it wrong! You're actually... *GASP* ... PROVIDING sources!

My german vocab has always been miserable, so I clicked a few links from that page you showed and found this: http://kurfurst.org/Engine/Boostclea...arance198.html Scroll down to see the english text where it talks about a P/W source stating the MW50 injection on the G-14 variants was good for 30 min, in 3 10 minute stretches with 3 min in between. If each of the 3 full 10 minute sessions was used in flight, it reduced the engine lifetime by half.

If you can find anything else very specific to Db605 MW50 operation then be sure to post it here with a translation, but the data seems to be pretty clear it's limited to 10 minute sessions with cool down periods.



So to Mustang's original point, "engine on fire after 13 minutes".

He presumes that the reason his engine is on fire is due to heat. One of the most well known side effects of water injection is increasing the overall pressures inside the engine block due to the additional charge increase from the water and additional fuel. While the engine itself may or may not overheat, it does put tons of wear and tear on other parts that aren't as robust, like piston rings, head gaskets, valve seats, etc. Ironically he talked about his "friend" who used NO2 in his car, which is just peachy. I also work on cars and have participated in engine rebuilds and modifications. One of the biggest dangers from NO2 use is blowing out the engine gaskets due to the increased compression and pressures seen as a result. Two can play this "USE THE BRAIN", provide xxxxxxxx examples to prove a point game.

So, as Badaim suggested... we can go back and forth about this as armchair experts, but at the end of the day the only thing that matters is what the manufacturer, pilot, and mechanic wrote down as operational characteristics.