Engine Stops

[Thorns]

Take off ok, flying around with temps all good, and the engine just stops. Happened two times in a row...Alright Gurus...Why? What has changed and what am I doing wrong? Thx.

[-Rudel-]

Give more details, post a video, post a log, post a track.

Wee don't know what you did wrong just because temps are good.

[HotTom]

SAME PROBLEM

 

[-Rudel-]

Give more details, post a video, post a log, post a track.

Wee don't know what you did wrong just because temps are good.

[Rudel_chw]

55 minutes ago, Thorns said:

what am I doing wrong?

 

how could anyone answer that if you don't care enough to post a track? 

[Saxman]

Make sure you're switching from Reserve tank to Main and setting mixture to Auto-Lean once you're in the air. Also, watch your cylinder head temperatures and oil temperatures. The engine may die if it's run too hot for too long.

[HotTom]

May come as a shock to Rudel (who has helped me too many times to count) but I have never, in 15 years of flying DCS, made a track file. I had to find a lesson 

Here is my track file. It now happens every time both with and without wingmen.

Thanks!

LastMissionTrack.trk

[MIDWAY]

Perhaps its engine knock from to high of MP without the water injection?  I'm hearing a knocking sound now if I don't have the master WEP button on and am into the MP pressures where its needed.    Working just like the P47 for me.  

 

Edit:  Just tested.  Confirmed that engine knock from excessive MP WITHOUT WEP will cause engine seizures.  

Edit 2:  With WEP engaged, you can still exceed WEP MP pressures and knock the engine into a seizure.  Follow the manual...or listen for the knock.  The sound is pretty handy and nicely done.  

Edited 5 hours ago by MIDWAY

[Thorns]

Thanks Midway for the reply. Will see if that works. Cheers! 

3 hours ago, Rudel_chw said:

 

how could anyone answer that if you don't care enough to post a track? 

Rudel, this is DCS right after an update. Enough said…IYKYK…I’ve been flying this sim for a long time!

Edited 5 hours ago by Thorns

[Saxman]

1 hour ago, MIDWAY said:

Perhaps its engine knock from to high of MP without the water injection?  I'm hearing a knocking sound now if I don't have the master WEP button on and am into the MP pressures where its needed.    Working just like the P47 for me.  

So how does this work with the master switch now? Especially considering the Corsair didn't HAVE a master switch and it was all done through throttle position.

[Nealius]

With the MP needle spastically bouncing around up to 5" on the gauage how do we know precisely where we need WEP?

[-Rudel-]

38 minutes ago, Saxman said:

So how does this work with the master switch now? Especially considering the Corsair didn't HAVE a master switch and it was all done through throttle position.

[HotTom]

I tried again with a smaller ordnance load and no problems. Stuck to two 500lb bombs and four HVARs and the engine did not seize. Although the load of two 500-lb bombs and eight HVARS was within limits on the accompanying chart (98 percent) it seemed to overstrain the engine. I think that was my problem.

In other news: I still can't find a WEP switch or the A6M5. I have the latest update but don't see them. Strange.

[Nealius]

I don't recall seeing an A6M5 mentioned in the changelog.

[MIDWAY]

I did some more testing.

Oil temp definitely will cause the engine to seize now too.  Seems to only be a problem down low.  I bet this becomes a big problem for a lot of new people since the gauge is small and it changes quickly, especially carrier ops.  

Misuse of the supercharger handle caused issues as well.  Sometimes you'd get the knocking noise, sometimes the cockpit shakes quite a bit.  

Cylinder head temps cause issues.  Nothing new here.  

 

Overall its a lot to manage.  But I think its well done and nothing is surprising or sudden so long as you do normal instrument sweeps.  

Edited 1 hour ago by MIDWAY

[Saxman]

11 minutes ago, MIDWAY said:

I did some more testing.

Oil temp definitely will cause the engine to seize now too.  Seems to only be a problem down low.  I bet this becomes a big problem for a lot of new people since the gauge is small and it changes quickly, especially carrier ops.  

Misuse of the supercharger handle caused issues as well.  Sometimes you'd get the knocking noise, sometimes the cockpit shakes quite a bit.  

Cylinder head temps cause issues.  Nothing new here.  

 

Overall its a lot to manage.  But I think its well done and nothing is surprising or sudden so long as you do normal instrument sweeps.  

Carburetor temperatures appear to be VERY aggressive. It seems to take very little time under WEP for the carb temperature warning light to come on, at least at middle altitudes, forcing you to shift to Low or Neutral (even in the Low Blower band) and lose a good chunk of your power in the process. And your engine WILL seize if you don't. Personally I've never been a fan of this sort of engine temp modeling, as it just feels like an artificial limit on the player.

[MIDWAY]

Exceeding WEP time limits also causes gradual loss of power followed by a seizure.  No cockpit shaking or engine temps outside of limits on this failure.    More testing needed to see the time limits.  

Edit:  Military power (no wep) also has a time limit.  Follow the manual/ kneeboard data. 

I found max cruise MP/RPM pretty easily in my testing.  I'm keeping that to myself tho.  

32 minutes ago, Saxman said:

Carburetor temperatures appear to be VERY aggressive. It seems to take very little time under WEP for the carb temperature warning light to come on, at least at middle altitudes, forcing you to shift to Low or Neutral (even in the Low Blower band) and lose a good chunk of your power in the process. And your engine WILL seize if you don't. Personally I've never been a fan of this sort of engine temp modeling, as it just feels like an artificial limit on the player.

Intercooler flap are the key here.  Half open usually prevents issues unless your in the high blower too soon.  

Edited 1 hour ago by MIDWAY
More testing.