Fuel Octane differences?

[awrabbit]

ok..... my question how is HT modeling the fuel?

and also is he basing his test on USAAF tests of captured enemy planes with the high octane fuel that the US  used or is he using the lower octane fuels that we available in the other countries?

has always been a question.   

this would skew the performance data gathered.  and I find it hard to believe that the axis and the USSR  aircraft had this uber performance like they do in AH based on the stories that I have read these countries had a much poorer quality fuel that would significantly change the performance.

thought or facts?

[Zimme83]

We dont have any 150 octane fuel in the game so the allied planes using it irl dont have the same top performance in the game as they had with 150 octane fuel. Spit XIV is the best example, with 150 octane fuel it would have been a true monster.

Edit: The spit IX (Or rather the in game XVI) gained 30 mph top speed and 950 fpm climb with  +25 lb/sq.in boost instead of the +18 lb/sq.in boost it have in game, that would put it almost equal to a in-game D-pony on wep...

http://www.wwiiaircraftperformance.org/150grade/150-grade-fuel.html

[Zimme83]

Compare the charts and the gain in performance with 150 octane fuel is obvious:

[awrabbit]

very interesting read good info.

[Zimme83]

Both the D-pony and spit 14/16 would be perked with 150 octane fuel. A spit faster than a Tempest and outclimbing a K-4 is maybe not what we want... the later Jug:s would prob face perking too

[Devil 505]

What you have to remember is that in order to utilize 150 octane, the engines must be tuned-up to run at higher power setting first. If you can't just pour in 150 octane fuel into a plane tuned for a lesser octane rating and have any benefit. Same principle applies to any change to a higher octane fuel from where you started. Octane rating is just that fuel's ability to resist detonating from the compression and heat in the cylinder before the spark plug fires.

[Zimme83]

Of course, but we're just assuming that the engines are optimized. Hard to compare the performance otherwise.

[GScholz]

While the Japanese did suffer from several quality issues for various reasons, the European Axis powers did not lag behind the Allies in fuel quality. German C3 fuel was pushing 140PN near wars end.

[GScholz]

Just a friendly reminder that the 109K4 we have in AH runs on B4 fuel and has ~1770 hp. In 1945 there were C3 powered K4s flying in Reich's Defense with ~2200 hp.

[Randall172]

give all planes the same fuel!

[Devil 505]

Of course, but we're just assuming that the engines are optimized. Hard to compare the performance otherwise.

I just wanted to clarify that the power gains are not from the fuel but the engine tuning.

[GScholz]

give all planes the same fuel!

That's impossible. All planes won't run on the same fuel.

[MiloMorai]

Just a friendly reminder that the 109K4 we have in AH runs on B4 fuel and has ~1770 hp. In 1945 there were C3 powered K4s flying in Reich's Defense with ~2200 hp.

That is about 200hp to high. Late war German fuel had quality issues.

Now don't go doing a Kurfurst on us. The only unit was one staffel that did operational testing in Dec 44-Jan 45. The use of 1.98ata was not cleared for use til late March 45 and there is no proof that the 4 Gruppen authorized to do so actually did.

[GScholz]

100/150 octane Allied fuel had its issues as well. It was really at the limit of chemical technology. There is plenty of photographic evidence of 109K's with C3 fuel markings.

[MiloMorai]

Did the Allied fuel turn to sludge like late German fuel?

There is plenty of photographic evidence of 109K's with C3 fuel markings.

Yes but no MW50.