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On page iii there is a graphic saying C3 as a percentage is >125 than rich mixture 130.
1.25 x 130 = 162.5
Am I understanding this correctly, rich mixture C3 has a PN of 162?
On page iii there is a graphic saying C3 as a percentage is >125 than rich mixture 130.
1.25 x 130 = 162.5
Am I understanding this correctly, rich mixture C3 has a PN of 162?
Not that I'm aware of, I think that may refer to aromatic content.
View attachment German Fuel Testing Oppauer Method.zip
Is the Germans' own testing of captured fuels vs B4 and C3 using their "Oppauer Method".
1.25 x 130 = 162.5
Am I understanding this correctly, rich mixture C3 has a PN of 162?
Not that I'm aware of, I think that may refer to aromatic content.
View attachment German Fuel Testing Oppauer Method.zip
Is the Germans' own testing of captured fuels vs B4 and C3 using their "Oppauer Method".
Last edited:
Below is a link to British fuels intelligence. It's an 18 page pdf but check out page 9
http://www.fischer-tropsch.org/Tom Reels/Linked/A5464/A5464-0638-0654 Item 6A.pdf
C3 Octane Number RON PN
Basically the average RON/PN of German C3 over 1942 was
Lean 93-94 RON with a Rich Performance Number of 110
Over June 1943 onwards (hard to tell exact date the dates and typing is mangled maybe they mean 1944)
Lean 95-96 RON with a Rich Performance Number of 125
The increase taking place in 1943 makes sense as at that time the Fw 190's BMW 801D2 went from 1.42 ata boost to 1.65 ata and C3 einspritzung further increased power.
This is the source of the above pdf
Microfilm Reel A5464
http://www.fischer-tropsch.org/Tom Reels/Linked/A5464/A5464-0638-0654 Item 6A.pdf
C3 Octane Number RON PN
Basically the average RON/PN of German C3 over 1942 was
Lean 93-94 RON with a Rich Performance Number of 110
Over June 1943 onwards (hard to tell exact date the dates and typing is mangled maybe they mean 1944)
Lean 95-96 RON with a Rich Performance Number of 125
The increase taking place in 1943 makes sense as at that time the Fw 190's BMW 801D2 went from 1.42 ata boost to 1.65 ata and C3 einspritzung further increased power.
This is the source of the above pdf
Microfilm Reel A5464
Shortround6
Major General
It may just mean that the rich mixture response is greater than 125 without actually putting an upper value on it.
When testing captured gasoline there may only be so many tests you can run on it before you are out of sample.
The test engine had to run on a reference fuel to compare the sample to. If no reference sample above 130 PN is available all the testers can say is that the fuel equals or responds better than the reference fuel.
XXX<YYY means xxx is less than yyy without saying by how much and XXX>YYY means xxx is greater than yyy without saying by how much.
When testing captured gasoline there may only be so many tests you can run on it before you are out of sample.
The test engine had to run on a reference fuel to compare the sample to. If no reference sample above 130 PN is available all the testers can say is that the fuel equals or responds better than the reference fuel.
XXX<YYY means xxx is less than yyy without saying by how much and XXX>YYY means xxx is greater than yyy without saying by how much.
