RLWP Posted August 16, 2018 Share Posted August 16, 2018 58 minutes ago, Hardcore said: I know that feeling. Wish my sources were more informative about stuff like that. Dirty exhaust is what I associate with suboptimal combustion, or impurities in the fuel. Does Nox or MW50 count? Hard to think Water and alcohol would add anything but steam. MW50 cools the air charge down, much like a turbo intercooler in a car the aero engine has the supercharger that increases the volumetric efficiency, but no Intercooler Richard Link to comment Share on other sites More sharing options...
Hardcore Posted August 17, 2018 Share Posted August 17, 2018 5 hours ago, RLWP said: MW50 cools the air charge down, much like a turbo intercooler in a car the aero engine has the supercharger that increases the volumetric efficiency, but no Intercooler Richard Yeah, but does that make the exhaust dirtier? Technically it allows higher compression and better higher efficiency. Isn't that what help making car engines run cleaner??? Link to comment Share on other sites More sharing options...
MikeMaben Posted August 17, 2018 Share Posted August 17, 2018 I think you're right about the fuel quality too, but the stains were a cumulative thing which and thus dependent on how often it was cleaned or not. Link to comment Share on other sites More sharing options...
RLWP Posted August 17, 2018 Share Posted August 17, 2018 19 hours ago, Hardcore said: Yeah, but does that make the exhaust dirtier? Technically it allows higher compression and better higher efficiency. Isn't that what help making car engines run cleaner??? Without knowing more about the system, it's hard to comment. Did the fuel system chuck in more fuel to match the estimated cooling effect? I guess that's possible, and would be hard to get the quantities right leading to overfuelling Now, can I be bothered to google this?.... Richard Link to comment Share on other sites More sharing options...
RLWP Posted August 17, 2018 Share Posted August 17, 2018 (edited) A few tentative bits of information here: https://www.456fis.org/DAIMLER-BENZE_DB-605.htm More stuff on fuel systems needed MORE: And here: http://www.museomotori.unipa.it/scheda.php?id=26&lang=en Edited August 17, 2018 by RLWP Link to comment Share on other sites More sharing options...
LSP_Ray Posted August 18, 2018 Share Posted August 18, 2018 6 hours ago, MikeMaben said: I think you're right about the fuel quality too, but the stains were a cumulative thing which and thus dependent on how often it was cleaned or not. That could be another reason it is seen more on later aircraft than early ones. They probably didn't have as much time to worry about it later compared to the higher standards of the early years. MikeMaben 1 Link to comment Share on other sites More sharing options...
Hardcore Posted August 18, 2018 Share Posted August 18, 2018 Cleaning a fighter shouldn't have taken many minutes for a crew. Link to comment Share on other sites More sharing options...
RLWP Posted August 18, 2018 Share Posted August 18, 2018 40 minutes ago, Hardcore said: Cleaning a fighter shouldn't have taken many minutes for a crew. What stage of the war? Under what staffing levels? Towards the end, the Luftwaffe was getting short of everything Richard Link to comment Share on other sites More sharing options...
Gazzas Posted August 19, 2018 Author Share Posted August 19, 2018 3 hours ago, Hardcore said: Cleaning a fighter shouldn't have taken many minutes for a crew. I read Willi Reschke's book about the Wilde Sau towards the end of the war when they had become daylight fighter pilots. They were losing planes so quickly that they quit painting unit symbols and quit puttying and sanding the wings. No telling what else the quit doing with their time. Fighters had to be pushed into the woods to save them from marauding flights of American fighters. And I'm certain the fuel was worse as the war wore on. Aviation fuel was made from coal, and the facilities that made the fuel were high priority targets. It's amazing that they had any fuel at all. I'm sure there are countless things that we have barely imagined which changed how ground crew did their jobs. Heck, with the Luftwaffe ground divisions hungry for men, it's easy to imagine that these ground crewmen weren't always safely miles behind the front. Gaz Link to comment Share on other sites More sharing options...
Hardcore Posted August 19, 2018 Share Posted August 19, 2018 Interesting thing about synthetic fuel: it seems it actually was cleaner than oil based products. At least that is the impression I got from reading on Wikipedia. Link to comment Share on other sites More sharing options...
TimHepplestone Posted September 29, 2018 Share Posted September 29, 2018 While searching online for pics of weathered 109’s I came across these 2 examples on Britmodellers site. So clearly they could get dirty. CANicoll and Gazzas 2 Link to comment Share on other sites More sharing options...
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