Engine fire on take off

[DaveRindner]

I have been experiencing inordinate amount of engine fire on take off. I figure its has to be becouse I advance throttle to fast, flodding the engine, or I keep max thrust for too long. I watch turbine speed during take off, it never goes above 90%. But I still get them.

 

So when I get this situation I am heavy and nose up.

 

Emergency procedure

-Nose level

-Pull engine fire t-handle

-Activate fire suppression bottle

-max thrust on remaining engine

-jettison stores.

-keep flaps down

-gear up

 

Now I need to go around and land ASAP. Except by the time I go through all the steps, the aircraft, nose level or slightly up, is at or below 120 kias, and will not speed up. No matter what I do. Flaps up to level one. Nose down to trade altitude. Eventually speed goes below 100 and its punch time.

I would have thought that empty A-10 with 40% fuel , no stores. Can recover on one motor. Yet this is not the case. On takeoffs, wheels up.

[Snoopy]

Check the mission in the editor, 99% of engine fires on takeoff is because of the "Bird %" settings.

 

As to the procedures....

 

[DaveRindner]

I've been experincing bird strike! OK that makes sense. My birds are at 400%

[Demon]

So, are bird strikes just a probability-based thing? That's kind of unfortunate, it would be much cooler if there were physical birds that you could purposely avoid if you saw them in flocks and such.

[159th_Viper]

.......were physical birds that you could purposely avoid if you saw them in flocks and such.

 

That's the problem: You never see them until it's too late.

 

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Edited October 3, 2014 by 159th_Viper

[ARM505]

Birds strikes won't normally cause an engine fire either. Unless it's a particularly large bird (vulture, maybe a hadeda), the engine should continue to run, possibly with some vibration (damage to fan blades), and you of course get the KFC smell in the cabin.

 

I have personally had multiple bird strikes through the engine, and have never needed to shut an engine down because of them. I would be VERY surprised to get an engine fire from them, but again, a particularly large bird may do a whole bunch of stuff, who knows. We obviously track all bird strike statistics in our company, and none have cause an engine fire in my time there. There have been several catastrophic (ie the engine was pretty wrecked) strikes though.

 

But of course DCS just models it in the abstract - maybe they can think of changing this rather generic approach though. Instead of a fire, I would recommend something that results in a drop in N1 RPM, an increase in EGT, and a big increase in vibration - that would be more in line with that I'd expect from a high-bypass turbofan. Also, burn a feather under your nose (smells terrible!)

 

And yes, you can't really avoid them - you can see them coming often, but IMHO there's no way you're going to guess exactly what they'll do, and you will just as likely move your engines to hit them as miss them completely.

[mvsgas]

This is scenario will vary. Many people will have different experiences in RL. I have seen engines severely damaged with several blades bent. I had a jet having to ground abort after a bird hit the engine during takeoff, it had a huge stall/stagnation. The pilot had to drop the tail hook and stand on the brakes. We had to change the tire because the main deflated. The brakes where glowing red, we had to wait until they cool off. I am no pilot, but it would not be possible to avoid birds in all situations, specially at high speed. Seen birds flying and trying to avoid them within DCS, not sure that would be a good idea, I have enough trouble avoiding AAA.

 

P.S.

If you think birds smell bad ( they are awful specially when you are cleaning them of some hot fan blades) you should try a rabbit strike. We had a jet hit a rabbit on landing, all the part spread all over the jet and some landed on the hot brakes...terrible.

 

Click on image to enlarge

Col. Bill Thornton takes a look a the damage done by a bird strike to his F-16 Falcon aircraft after his fini flight as a commander here. Wildlife biologists with the U.S. Department of Agriculture Wildlife Services are tasked with implementing the Bird and Wildlife Aircraft Strike Hazard program. (U.S. Air Force photo)

Edited October 3, 2014 by mvsgas

[Snoopy]

The thing to remember about the TF34-GE-100 on the A-10 is a high bypass engine, most of the air flows around the actual engine core between the inner shrouds and outer cowls. I've seen aircraft come back with a bird strike with no damage or visible sign to the fan blades at all but you see a feather stuck between the aft and outer cowl. Open the cowl up and the bird is stuck in the seam between the cowls.

 

Another that happened about a year ago went in just above the left side of the nose, the lies punched through the skin and parts splatter the pilot and all inside the canopy.

Edited October 3, 2014 by Snoopy