The Mustang III is too fast at altitude.
It appears that it has 81" Hg performance whilst only drawing 70" Hg. This isn't just a boost gauge issue, as the supercharger gear change takes place at the wrong height too.
At 81" Hg (+25 psi boost) full throttle height in MS gear should be about 8,000 feet, with supercharger gear change taking place at around 12,000 feet. Full throttle height in FS gear should be around 20,000-21,000 feet.
In game, supercharger gear change takes place at about 15,000 feet which is exactly what one might expect were the engine rated at 70" Hg.
Full throttle height in FS gear in game is about 25,000 feet.
This means that excessive performance is available between about 8,000 feet and 15,000 feet, and again above about 20,000 feet. By 25,000 (7500 m) feet the aircraft is capable of very excessive speeds (~770 km/h according to wonder woman view on the crimea map).
It seems that the P-51C was given extra power to turn it into a Mustang III without alteration of the engine's full throttle height.
<span class="ev_code_RED">This issue is especially important if we're going to get a +25 psi Spitfire as the same pitfall awaits.</span>
Source:
http://www.spitfireperformance.com/m...stangtest.html
You did not say P51 was best at everything and you even try to prevent same thing happening with the mew Spitfire, now watch your thread being ignored.
I for one completely agree with you, this issu has been mentioned before and Robban made the tests: http://forums.ubi.com/eve/forums/a/t...3/m/7321095783
I'd just like to add that I have always made tests with wind and turbulence on. For speeds without wind, detract 6-8km/h from the top speed.Originally posted by Brain32:
Robban made the tests:
The speed test below is made without wind and turbulence.
Crimea, full fuel default loadout, rads closed. In meters and km/h(TAS).
Mustang III
SL - 650
1K - 675
2K - 705
3K - 730
4K - 730
5K - 720
6K - 760
7K - 771
The Mustang III, as well as P-51B/C/D, lose between 40 and 60(!) km/h in top speed with wing racks fitted!![]()
IAS isn't, but TAS is affected(in-game) when wind is turned on.Originally posted by Skunk241981:
Airspeed isnt dependant on wind. So with or without wind you would get the exact same figures.
For example, with wind I get 621km/h at sealevel with the D-9'45. With wind off I get 612km/h. Perhaps true airspeed really is ground speed.![]()
I've posted a thread on the warclouds forums including a zipped track.
http://www.war-clouds.com/forums/vie...hp?p=3937#3937
As I understand it...the real overboosted aircraft gained performance at low altitudes and gain some performance all the way upto their best rated critical altitude and above that they were the same as the lower boosted versions.
This is true of the Spitfire LF.IX with 150 fuel/+25lb boost. I imagine this is also true of the Mustang Mark III with the same type of configuration. So the guess here is that the game is boosting power above best speed/critical altitude as well as at lower altitudes.
Am I correct? Does the graph only diverge after rated critical altitude?
http://www.spitfireperformance.com/merlin66hpchart.jpg
The HP produced converges as it becomes supercharger limited rather than engine durability limited. You can see the big difference it would make at certain altitudes. At 12,000' a +25lb boosted engine is producing over 400 hp more than the +18lb engine. But there is no difference at 20,000' and beyond because the engine then becomes supercharger limited. So above 20,000' the Mustang III shouldn't be any faster than your stock standard boosted Mustang.
EDIT: I just took out the picture from spitfireperformance because I realised it had a big "do not distribute or copy" on it. You can just click on the link to look at it now