Huricane Mk I 100 Octane perormance tests 1.07.18301

[Al Schlageter]

But Seadog, Crumpp says the Pilot's handbook says nothing about 12lb boost.

[Bounder!]

Thanks for posting Klem

[klem]

Just did a quick comparison of Hurricane Mk I 87 Octane vs 100 octane at 1000, 5000 and 10000 feet.

Seems the old 87 octane is faster than the 100 octane

Would appreciate it if anyone else would like to check that.

[=AN=Felipe]

Originally Posted by klem

Just did a quick comparison of Hurricane Mk I 87 Octane vs 100 octane at 1000, 5000 and 10000 feet.

Seems the old 87 octane is faster than the 100 octane

Would appreciate it if anyone else would like to check that.

We will test all them again =) its no problem ok?

cya

[Igo kyu]

Originally Posted by klem

Just did a quick comparison of Hurricane Mk I 87 Octane vs 100 octane at 1000, 5000 and 10000 feet.

Seems the old 87 octane is faster than the 100 octane

Your figures are without boost. The difference was AIUI (which may or may not be correct ) that 100 octane allowed more boost at low level. So figures without boost shouldn't show a difference, and with boost only up to FTH.

[Bounder!]

Originally Posted by Igo kyu

Your figures are without boost. The difference was AIUI (which may or may not be correct ) that 100 octane allowed more boost at low level. So figures without boost shouldn't show a difference, and with boost only up to FTH.

I think that's precisely the point (or problem) that there shouldn't be a difference ingame between the 87 and 100 octane without boost but there is. All I hope is that the devs had said that the FM were still WOP and so data like this is good as it can highlight problems with the current ingame FMs.

[Igo kyu]

Originally Posted by Bounder!

there shouldn't be a difference ingame between the 87 and 100 octane without boost but there is.

There will be variations between runs at exactly the same settings (unless they are flown by utterly flawless autopilots). If the variation between runs with different settings is in about the same range as the difference between runs with the same settings, then that's the best that can be expected, and that graph looks as if it might be the case. If more tests show similar variations between runs at the same settings, it's probably alright, if with the same settings you come up with identical numbers time after time, and there is a significant (in the technical statistical sense) difference between settings, then there might be a cause for concern.

I shan't bother to do any testing myself.

[Bounder!]

Originally Posted by Igo kyu

There will be variations between runs at exactly the same settings (unless they are flown by utterly flawless autopilots)....

Oh absolutely and the difference in the graph between 87 and 100 tested in game appears small - repeat tests may well show the difference is due to random variation between tests rather than a real difference between the models in game. Perhaps I misread your post, I was merely pointing out that there should not be a real difference between 87 and 100 octane without boost.

Something that does seem off in the Spit 1a 100Oct vs 87Oct is engine overheat, particularly in the climb and at altitude (not using boost) where the Spit 1a 100Oct is far more sensitive to overheating and so I find I have to use lower power settings in the 100Oct version currently than in the 87Oct version. I haven't done much testing in the Hurricane versions but it wouldn't surprise me if it was a problem here also. It's important to have people testing the new FM as they are WIP and so they can be modeled properly and it's great that people are doing so.

The big cause for concern at the mo is the difference between the modeled ac and rl performance which is off in both the Spit 1a and Hurricane, I haven't seen much data for the 109 but would love to as it's important that all aircraft in game are modeled as accurately as possible and it may well turn out that the 109 is also suffering under-performance.

[=AN=Felipe]

[/QUOTE]

Originally Posted by Al Schlageter

But Seadog, Crumpp says the Pilot's handbook says nothing about 12lb boost.

Merlin II and III got 12lb boost in WEP settings with 100oct fuel...

Spitfire IIa ALL them got 100oct engines (Merlin III or Merlin XII), so... hurricanes too