Im using MEC in the d30 now but im experiencing hp drop at around 4000 meters
the engine sounds like its been turned off or set to idle but no alerts or anything appear in the low left corner
it also occasionally flashes high max engine rpm warnings
this is with 100 prop pitch 100 both radiators 70 mixture and auto supercharger
am I doing something wrong?
I think its a problem with the mixture but the usa arb MEC guide says the d30 shouldn’t have mixture in the first place
have you been changing your supercharger’s gear?
It seems to be a problem induced by switching to MEC at low IAS above certain altitudes. I’ve been able to recreate this by switching on MEC and going to 100% PP at altitudes over 6500m and IAS below 300. Will make a bug report.
https://community.gaijin.net/issues/p/warthunder/i/Mhej0T5fwfjl
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Same problem with I-225 a year ago:
https://community.gaijin.net/issues/p/warthunder/i/gdW6iVWSSbsq
Still not fixed.
d30 doesnt have supercharger gear control
binding a key and pressing it only alerts no automatic supercharger gear control
This is the Packard 1650-7 mustang isnt it?
I know the issue. one moment
Ive figured out your problem.
The P-51 D30 uses the Packard 1650-7.
This is a licence version of the Rolls Royce Merlin 66, fairly sure it was also known as the merlin 266 (the 2 designating it as a packard built). almost the same model as the engine in the LF mkIX spitfire
the Merlin 66 has a single stage supercharger thats optimised for low altitude flight, your power curve falls off a cliff with altitude because the supercharger will not compensate for thinner air
excuse this mustang its stock as i dont play america. almost the same engine so performance should be nearly the same
That is not what is happening, you do not see a gradual drop off of horsepower with altitude as with any other plane but a violent oscillation in engine RPM (which should be unaffected by altitude) that only sets in IF you activate manual prop pitch at some point.
And by the way, the D30 maintains a higher horsepower output than the spitfire LF at higher altitudes:
i do notice the rpm gauge oscillating at 4 or 5 thousand meters
Gaijin added mixture controls to a bunch of planes (including P-51s) a couple of months ago I think and the MEC guide hasn’t updated on it yet. For P-51D-30 you need to lower mixture percentage as you go higher. For me when I tried it 60% is good until around 5500m and then need to lower further to 50% for anything higher.
Yeah, sounds like this is the case.
Kinda weird to require mixture control on P-51s when they have semi-automatic mixture control IRL.
The actual mixture control is…
Push lever to “lean”: Gives you optimal mixture for long-distance cruise but risks engine knocking and overheating if you forget to adjust before combat.
Push lever to “rich”: Gives you optimal mixture for dogfighting
Push lever to “full rich”: to be used when semi-automatic mixture controls breaks and during engine start-up.
There’s no altitude-based mixture adjustment required. Far I know, only soviet aircraft requires manual mixture adjustment based on altitude. 109s (at least from the F) do it automatically. Spitfires, P-39s/63s do it like Mustangs.
I mean, engine control in this game is an absolute shitshow, afterthought etc. so I am not surprised it’s wrong.
No, even with AEC the RPM oscillation still exists and even if you lower the mixture in MEC the oscillation doesn’t go away.