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Not sure what you mean by this, but they most certainly did.It is interesting that WW2 planes engines did not have oil or air filters.
I have, engines did have oil filters (see post above) and most in desert environments had air filters, the Spitfire 's was called a Vokes filter. The rest of your post is actually just a comparison of engine stroke, which when multiplied by RPM gives piston speed, see post by S/R.Yes go read
It is interesting that WW2 planes engines did not have oil or air filters.
So contaminates also were a cause for early wearing out of the engines.
Peace time operations also ran engines at lower HP levels!
Combat pushed the engines to their limits as it was a life death situation.
Maximum performance and how to get it became a game.
Germans standardized on 96 octane fuel and used ADI or NOS to improve performance.
Allies had 100, 130, and 150 octane, Radial engines adding ADI for more performance.
German engines were 37 liters to our 28 liters and rarely ran them above 2800 rpm.
The Allison was pushed to 3600 rpm, mostly limited to 3200 and the Merlin 3000.
Some of the later British Sleave Valve engines went to 4000 rpm
To get more power the Germans would bore out their engines and port and polish the runners.
Always wondered what a Reno Racer air speed would be at best altitude?
Yes go read
This is a problem with fastening on one little tidbit of information and trying to make a big deal of it. Without context (time of use or scale of use) it doesn't really tell us what was going on or just confuses things.
In 1941-42 some units in the field were overspeeding Allison engines but this was not approved by either Allison or the USAAF/RAF high command (unless someone has docurmantion to the contrary).
I believe the Merlin was also allowed a fair degree of overspeed in a dive.
Maybe it wasn't universal but you need a better system than looking for scorch marks and more oil than usual on the outside of the plane. These planes used gallons of oil per flight. A P-47 could use a couple dozen gallons in one flight.
Trouble with this is if the engine was "pushed" in the morning and then flew in the afternoon did they really have time to clean the morning oil stains of and repaint the area behind the exhaust stacks before an afternoon flight?
Sometimes due to weather no flying was done for days at a time and at other times several missions were flown in one day.
The p 40 was too heavy and its climb rate too slow to be equal to the 109. Canadian P 40 ace Stocky Edwards had a chance to fly both and he considered the 109f superior. He states that it was difficult to fly the Kittyhawk to its strengths and lateral instability and jamming guns made it tough to succeed in combat involving violent aerial manueovres.
Slaterat
The one thing that all these comparisons that I have seen is they fail to identify which models of each aircraft.
Gun jamming was a problem not only on P-40s but also on almost all US aircraft. Given some of the cartoons on the subject the main problem was sloppy handling of the assembled belts
Amazing - the P-40 with number 58, as the type was represented in the PG3
Forgive my ignorance - what is PG3? Page 3?