[REPORTED] Spitfire - strange engine failure - Page 5 - ED Forums
 


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Old 08-09-2018, 09:07 AM   #41
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Guys, while I appreciate the sharing of any kind of knowledge, I feel that this thread is being derailed constantly towards fuel pumps. Even if someone is using the pumps correctly, the Merlin overcools and dies at low power settings and high altitudes. (around 0 boost and below 2500 RPM)
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Old 08-09-2018, 10:06 AM   #42
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Best way to check if overcooling is a factor is to monitor your engine coolant & oil temperature gauges and see if they are within safe operation limits.
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Old 08-09-2018, 11:02 AM   #43
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They are absolutely not. After 3-4 minutes of cruising the oil pressure is at 150, and the coolant is below 40.
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Old 08-09-2018, 11:50 AM   #44
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Hi Reflected,

Just to check cos I can't see it actually been put in writing, but you're leaving the radiator switch in forward ("Auto") setting and not switching it on at any point in your start up sequence?
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Old 08-09-2018, 12:16 PM   #45
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Good call, thanks - I have it fully open for startup and takeoff, but always switch it to Auto after leaving the ground. I thought of this too, but the rad was in auto for sure.
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Old 08-09-2018, 03:58 PM   #46
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Unless the switch back to auto is bugged? Worth a test without operating the switch to see if there's any change.
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Old 08-10-2018, 12:16 PM   #47
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I checked, and the visuals work alright. When I switch back to auto, the radiator flaps close.
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Old 08-11-2018, 11:07 PM   #48
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Something's off and the problem is pretty easy to reproduce, actually, just did it twice in a row. One doesn't have to go high, as it's just an oil temperature vs pressure problem, so can be replicated at "tactical" altitudes:
a) create an air start mission in winter conditions, a bit freezing, but nothing radical - default winter Caucasus preset with sea level temp adjusted down to minus 10, altitude of about 2000 m;
b) set the fuel economy engine settings (+2 PSI, 2300 RPM), watch how the coolant and, most importantly oil temp drop (though they're still above minimum recommended figures), while oil pressure redlines the gauge;
c) after 2 minutes listen to pre-failure rumble coming in, after exactly 5 minutes watch the engine fail.

Both tracks attached, as it's uncertain which one will play correctly on other PC. Recorded in latest game version.

On a sidenote, after other flights at somewhat higher altitudes, It's worth noting, that even max continuous cruise settings (+7 PSI, 2650 RPM) are not enough to keep oil pressure below max rated figure of 120.

Needles to say, if that's how the real thing worked, there would've been no British planes fighting in operation Bodenplatte, as they all would've seized within 10 minutes after takeoff .

NineLine, would you mind poking Yo-Yo about this issue?
Attached Files
File Type: trk winter1.trk (753.3 KB, 3 views)
File Type: trk winter2.trk (1.07 MB, 6 views)
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Last edited by Art-J; 08-11-2018 at 11:10 PM.
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Old 08-13-2018, 05:32 AM   #49
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Thanks all, reported, thanks for the Mission Reflected, helped in testing and assessing.
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