Left engine dying

I was going to post this in the "Tracks, Missions, and Campaigns" subforum, but I have a feeling I am the one screwing this up, not the mission.

 

When playing the "Altitude" mission, my left engine keeps dying right around halfway through the mission. I have an idea of what might be happening, but I haven't had time to test this yet (can never get enough time with this sim!).

 

It happens around when the helos I am escorting start their descent to their LZ. I am at 4,000 meters, and around 160 km/h indicated. During cruise, about 5-10 minutes prior, the EKRAN warns me to turn on the rotor de-ice, which I do. I have not turned on engine anti-ice, as I didn't really think about it then, but even now, thinking about it, the "ICE DETECTED" light in the Ice Defrosting Control Panel, in the Rear Auxiliary Panel, is not on, so I am unsure of real icing?

 

Also, is there an Outside Air Temperature (OAT) indication anywhere in the cockpit?

 

Thanks,

It happens around when the helos I am escorting start their descent to their LZ. I am at 4,000 meters, and around 160 km/h indicated.

 

Also, is there an Outside Air Temperature (OAT) indication anywhere in the cockpit?

 

Thanks,

 

Are you descending as well? Icing is more likely than usual during this time as you have a lower power setting.

 

I too would like to know if their is an oat, I haven't seen mention of it yet:book:

Also, is there an Outside Air Temperature (OAT) indication anywhere in the cockpit?

 

Look above, on the cockpit ceiling but it's not modelled.

 

Seems like you're suffering engine flameout due to intake icing. When EKRAN warns you for icing turn on both rotor and engines ice protection.

Look above, on the cockpit ceiling but it's not modelled.

 

Ok, I can't understand... ED is capable to model the flow over the hydraulics pipes, the drift in the INS system, the GPS ephemeris... but a simple OAT indicator is not functional????

 

More attention for small details in future addons, please.

 

Regards!!

Ok, I can't understand... ED is capable to model the flow over the hydraulics pipes, the drift in the INS system, the GPS ephemeris... but a simple OAT indicator is not functional????

 

More attention for small details in future addons, please.

 

Regards!!

 

Read the Mission Briefing - Stipulates the Ambient Temperature.

Hi Viper,

 

That sure helps, thanks for the tip! It would be nice to see what the current OAT is, though, as it will change drastically in altitude, and also geographically on longer missions.

 

I guess what I am thinking is that the mission briefing temperature is a static snapshot in one location (I think, haven't seen it yet), whereas the OAT would be a dynamic value.

Look above, on the cockpit ceiling but it's not modelled.

 

Seems like you're suffering engine flameout due to intake icing. When EKRAN warns you for icing turn on both rotor and engines ice protection.

 

Thanks AirTito, I'll try that. Shouldn't the warning light I mentioned above be on, though, due to ice detection?

I agree with amalahama.

 

OAT is a needed parameter to fly properly. I don't know if any coding updates are planned, but it would be nice to see this functioning properly, especially as icing is modelled!

 

I'm a bit surprised about some of the decisions made.

 

Best regards,

Tango.

Yep, can't fly legally here without knowing the oat, be that an onboard gauge or met forecast for varying alt's.

Hi Viper,

 

That sure helps, thanks for the tip! It would be nice to see what the current OAT is, though, as it will change drastically in altitude, and also geographically on longer missions.

 

I guess what I am thinking is that the mission briefing temperature is a static snapshot in one location (I think, haven't seen it yet), whereas the OAT would be a dynamic value.

 

DCS weather system doesn't permit different weather condition in different places. So the temperature (at the same altitude level) is equal anywhere.

 

But this is not an excuse to no model the OAT indicator!! :)

 

Regards!!

Edited December 26, 2008 by amalahama

DCS weather system doesn't permit different weather condition in different places. So the temperature (at the same altitude level) is equal anywhere.

 

But this is not an excuse to no model the OAT indicator!! :)

 

Regards!!

 

OK, got it, but it still varies with altitude, right? Given the high terrain elevation variance in the BS scenery, OAT would be very useful!

Temperature dropping with increase in altitude is modeled, which is even more reason to have a working OAT gauge.

I think he has the dust covers still activated, so the engine has reduced power due to less oxygen.

That's why the engine dies on his helicopter in high altitude.

No, it's because of intake and Inlet guide vanes icing. If you turn on the engine ice protection (the switch to the up position) that will heat the dust protector as well. Of course, this is not for free because you're using compressor oultet bleed air, but better 100hp less than dead engine ;)

I just figured out that the dust/ice switch is 3 position, not two! I've been trying to fly Altitude a lot and I never seem to make it for various reasons. The last time I had an engine go out and managed to mid air restart, then the other one went out and I managed to restart again. It was hectic. Third time I could not get a restart and I landed safely in the middle of nowhere.

I had a lot of trouble with my left engine dying on this mission also. Manual states that take-off rpm is 98% and max. continuous is 93%. That 5% makes all the difference but is only a tiny visual difference on the tachometer. Also the EGT (exhaust gas temp) is a really good indicator of what's happening with your engines. If you notice it climbing or too high, you may have engine icing or are working them too hard.

 

Jack :pilotfly:

Edited December 27, 2008 by Jack57

But this is not an excuse to no model the OAT indicator!! :)

There was never a particular decision not to model the OAT gauge. ED simply didn't get to that part of the modeling continuum that is the effect of ambient atmosphere on the aircraft by the release time. They plan to move further down this continuum, but we won't make any promises.
Edited December 26, 2008 by EvilBivol-1

I figure an OAT gauge would be cake to add in. Surely that variable (used in engine calcs) is readily available in the programming space.

 

Also while you're at it please add throttle click zones and a click zone for the cockpit door!

There was never a particular decision not to model the OAT gauge. ED simply didn't get to that part of the modeling continuum that is the effect of ambient atmosphere on the aircraft by the release time. They plan to move further down this continuum, but we won't make any promises.

 

I see the point, but in this particular case I can't see the special complication. The ambient atmosphere could be improved in the future for sure, but at the end you will have an "ambient_temperature" variable which is what OAT indicator needs. How this "ambient_temperature" variable is obtained can be easily abstracted and actually it doesn't matter to the OAT gauge.

 

Regards!!

It's not really a complication. It's just what the programmer was able to code before being stopped by other tasks or the need to freeze the code.

Just to report back saying that I turned the engine anti-ice on when the EKRAN told me to turn on Rotor Anti-Ice, and did not experience any more engine problems.

 

I am still wondering why the Ice Detected light on the rear right panel does not come on? Is it a bug?

 

Thanks for all the help,

It's not really a complication. It's just what the programmer was able to code before being stopped by other tasks or the need to freeze the code.

Pun intended? ;)

 

--

Murphy