Lost EGI during Training Flight

[NoJoy]

I need your help again...

 

During my last training flight I put out some random Trucks and non-armed vehicles on the map. After emptying my stores I had some gun left. I overflew some trucks at 6000ft and then turned upside down to pull onto target again for strafing.

 

Before getting my hog stabilized and horizonal the Master Alarm went down - checking what happened I figuerd out that the EGI was gone, immediately I climbed out to a safe level and attitude starting to assess what happened. With no luck. No hits, no button threwing, nothing.

 

Well back home I landed (after inflight aligning failed) and parked. Resetting the whole system didn't bring my EGI back to live.

 

Investigating the debrief messages there was no sign of a hit. Furthermore as mentioned the vehicles were unarmed.

 

Any ideas? I know the most logical solution would be that I hit a button but I'm pretty sure not to.

 

One more weired thing is that I shut down both engines to have just the APU running while trying to bring EGI back on, the right engine fan keept spinning and also gave me a low oil pressure warning after well quite a while.

Also had some low indications on the temperature and rpm gauges for right engine. I shut of both at more or less same time and left engine was just cold.

 

As a bloody beginner this is the information I can give you, maybe you got an idea what happened around the corner...

 

Thanks!

[ricktoberfest]

The hog is not built to go upside down for long. If more than a second or 2 under negative G, you will stall/damage the engines and it's possible this caused the engine issue. As for the EGI, it probably turned off when your engines RPM dropped from the maneuver. In flight alignment takes a long time and I bet you didn't wait until it was fully alined before trying to turn it on.

 

EGI is very temperamental and switches off easily when something is not exactly right. When I started playing it took me weeks to figure out how to set it on the ground so that my autopilot would arm. (I wasn't waiting for a full alignment before taking off- and once flying it took much longer to finish aligning)

[Revelation]

The hog is not built to go upside down for long. If more than a second or 2 under negative G, you will stall/damage the engines and it's possible this caused the engine issue.

This just isn't correct....

 

The A-10 can fly upside down, the length is determined by how much fuel you are using. The A-10 has gravity fed fuel tanks, thus if you go upside down your fuel pumps will run out of fuel to feed the engines. You can generally fly for about 10 seconds inverted, again it depends more on your throttle position.

[kontiuka]

This just isn't correct....

 

The A-10 can fly upside down, the length is determined by how much fuel you are using. The A-10 has gravity fed fuel tanks, thus if you go upside down your fuel pumps will run out of fuel to feed the engines. You can generally fly for about 10 seconds inverted, again it depends more on your throttle position.

Ya, that is in the manual somewhere.

[JayPee]

Also, as far as my experience goes, fuel flow is disrupted when really flying inverted for about 10 seconds, not just by pulling of some crazy aerobatic for the duration of a few seconds.

 

Also regarding EGI, I've never had any trouble so far doing roll ins varying from 10 degrees dive to 60 degrees.

[ricktoberfest]

This just isn't correct....

 

The A-10 can fly upside down, the length is determined by how much fuel you are using. The A-10 has gravity fed fuel tanks, thus if you go upside down your fuel pumps will run out of fuel to feed the engines. You can generally fly for about 10 seconds inverted, again it depends more on your throttle position.

 

 

So the length of time varies, but like I said it isn't made to be upside down for more than a few (or up to 10) seconds. How is that wrong?

[Revelation]

So the length of time varies, but like I said it isn't made to be upside down for more than a few (or up to 10) seconds. How is that wrong?

Well let's see you originally said:

The hog is not built to go upside down for long. If more than a second or 2 under negative G, you will stall/damage the engines and it's possible this caused the engine issue.

 

Understand now or do you want me to break it down further....

[ricktoberfest]

My apologies then, I was wrong. Although I can not check the exact timing as I'm at work, the number is between 8.5 to 11.2 seconds depending on throttle position.

[Yurgon]

Also regarding EGI, I've never had any trouble so far doing roll ins varying from 10 degrees dive to 60 degrees.

 

Same here, this problem doesn't sound familiar.

 

OP, it would be best if you could post a track. Even better, reproduce the problem in as short a time as possible and post a track of that. :)

[NoJoy]

Thanks for your feedback - and it makes sense as I know that jet engines can't stand negative acceleartion for long but just to make clear - I did a Split S or negative Immelmann. So I turned upside down and immediately pulled the stick into a about 3 - 4 G positive recovery. There was very short negative acceleration. Doing a clean Split S maneuver there shouldn't be no negative G at all - if it's done right.

 

But u know what - gonna try this again and see what happens...

 

Anyways many thanks for your help and feedback!

 

Will let you know if it happens again!