Engine defect shortly after takeoff

[KansasCS]

Hey guys, I had this issue online, wherein I stat the engine normally, takeoff, climb shallow for a couple of minutes, maybe 4 or 5 and all of a sudden the Engine throttles to 1.0 ata and the prop is windmilling, gradually adjusting to 1230 pitch as I slow down.

 

My temps where within range, my ata was at 1.35 and my revs below 2500.

I tried again, this time going even easier on the engine. Still, same fault. I then waited to warm up the engine before taxiing to the runway and throttling up beyond 2000rpm.

Again, the engine died unspectacularly within minutes.

I tried in SP to see if it was online related but I got the same behavior.

I finally gave up and quit the game.

I little while later I restarted DCS and gave it another try. Started up the engine, taxied and took off as usual. This time, no fault.

The engine ran and ran and ran. Really pushed it on a second try, no warm up, just straight take off after ignition, still, she purred like a Katze.

 

My question: is this a bug?

Similar to the the bug wherein a locked up target would set up the radar a certain way in the mirage and you would have to unlock it, even after restarting the mission? They fixed that too, but that's the only other bug where certain states of the plane were carried onto the next spawn or mission load, if you will.

 

 

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[MAD-MM]

Kansas possible you forget circuit breaker from electrical fuel Pump? K4 behaves in this way when you forget it after take off suddenly the fuel pressure drop and engine goes down.

[KansasCS]

Seriously, double checked everything, save for the very first flight in which it occurred.

 

 

 

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[KansasCS]

I can imagine I forgot it on the first flight and some lua setting was changed to: screw his engine after time x, even though I already spawned in a different plane and later on loaded a sp mission.

 

 

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[Anatoli-Kagari9]

Maybe you forgot to set the prop governor to Auto ?

[MFG62 Joker]

Please load up a track where your issue happens so one could cross check whats going on.

[KansasCS]

I tried both. Governer in auto and manual.

 

 

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[Anatoli-Kagari9]

Then, there is yet another possibility...

 

Since the MW50 get's filled proportionally to the ammount of fuel loaded into your tanks, if you takeoff with, say, just 10% fuel, in 5 min you will have emptied the MW50 tank, and if you're using higher power settings you will "burn" your engine :-)

[KansasCS]

Then, there is yet another possibility...

 

Since the MW50 get's filled proportionally to the ammount of fuel loaded into your tanks, if you takeoff with, say, just 10% fuel, in 5 min you will have emptied the MW50 tank, and if you're using higher power settings you will "burn" your engine :-)

 

I might have found the culprit.

I switched the MW50 tank selector to 'Kraftstoff', as I thought that the up position would select the MW50 the methanol/water additive and is only actually needed if you activate the boost.

I am confused.

In the down position my engine just looses power in a matter of minutes, and in the in the up position (the MW50 position), I fly all day.

 

Obviously this is not a bug and I need to dig into the manual.

Apologies for having wasted your time.

[Anatoli-Kagari9]

I might have found the culprit.

I switched the MW50 tank selector to 'Kraftstoff', as I thought that the up position would select the MW50 the methanol/water additive and is only actually needed if you activate the boost.

I am confused.

In the down position my engine just looses power in a matter of minutes, and in the in the up position (the MW50 position), I fly all day.

 

Obviously this is not a bug and I need to dig into the manual.

Apologies for having wasted your time.

 

Not really a waste of time, but a very important detail which escaped me for a long time, although thanksfully the Servers I used to fly at all ha their 109s with the MW selector in the correct ( up ) position by default :-)

 

But if one assigns a joystick button / lever to that function and inadvertedly switches the selector, then it's good to know, where it is ( next to the tailwheel lock mechanism, and can even be mistakenly used because of that )

in the left side panel of the cockpit, above the flaps and trim wheels.

[saburo_cz]

I have similar experience, one.

After start engine, fuel pressure did not increased from zero and engine ran less tham one minute and went quiet. I switched all what i needed (fuel booster pumps also) but it happened.

Next flight everything worked correctly.

It was on public server.

[KansasCS]

From the manual

The additional internal tank located behind the pilot’s seat can be used alternatively to store the MW 50 mixture, or conventional aviation fuel, in essence providing extra range at the expense of available extra power.

The MW/Fuel Selector Handle is used to set the MW 50 tank status. Normally, it is set on the ground before the engine is started, according to the filled liquid, and left alone for the duration of the flight.

Please note that incorrectly setting this switch can have catastrophic results, by either feeding the water-methanol mixture into the fuel lines, or spraying aviation fuel into the supercharger.

The liquid type (MW or fuel) can be assigned via Mission Editor in the specify Additional Properties tab of player's aircraft panel.

NOTE! The liquid will be filled in this auxiliary tank if the fuel in the main tank is set not less 100 liters (34%) in the ME (mission editor).

The pump in the auxiliary tank is low-output device. Therefore the pumping of fuel from eiliary to main tank request about half an hour and depends of motor's manifold pressure.

I was basically telling the airplane that there is normal fuel in the aux tank, thereby feeding 100% MW mixture into the fuel lines.

It all makes sense now. I was under the impression that the fuel selector would alternate between normal fuel and MW enriched, and that the boost switch under on the front panel would activate the injection of said fuel.

Rediculous if I think about it.

I am an imbecile :D