[NO BUG] A10C Engine performance

There seems to be a long standing problem with engine performance in the A-10C, by which the aircraft is under-performing and the engines are not reaching realistic values of thrust ant ITT according to official documents.

There is a discussion on this thread:

http://forums.eagle.ru/showthread.php?t=171592

In DCS, it is not possible to obtain 800° ITT on a standard day. Nor does setting the Engine Fuel Flow switches to OVERRIDE provide any additional thrust, or resultant increase in ITT beyond 865° as it should. Depending on conditions, in OVERRIDE, the engines should be able to obtain nearly 1,000° ITT.

The relevant documents are:

T.O 1A-10C-1

T.O 1A-10C-1-1

AFI 11-2A-10CV3, Operations Procedures, on the AF ePublishing site

It is also my understanding, while we're at it, that the A-10 stalls too quickly, and in reality can give you a bit more AOA than DCS simulates.

Based on?

 

To make changes to the FM, we need better facts and reports than what they had to create the FM, this is the crux of any bug report.

Based on my discussion with a real life A-10C pilot:

1. Have you played DCS A-10C? If so, how close is it to the real thing? What stands out as being accurate / inaccurate?
   
   

Yes, I played it a couple time prior to flying the A-10 and a couple of times since. I do use the warthog HOTAS set. (maybe about 7 times total of sitting down and flying a mission)

 

 

The design of the jet and graphics are spot on and the handling is reasonably accurate. Big differances: The actual A-10 is much more forgiving than the game when it comes to how much AOA you can demand without stalling. The sim is impressivly accurate system wise with the full HOTAS/CICU/MFCD suite. Only thing is, that suite is very old now and many of the HOTAS functions have changed or entire systems have been replaced with others. The sim is suite 3.something and it shows. We are on suite 8 now.

 

 

Overall, I'd say the sim is very accurate in that there is nothing else out there (except the actual A-10 sims we train on) that comes close. 4/10 with a keyboard, 6/10 with HOTAS, and 9/10 with Oculus CV1.

It's still very vague for changing the FM, and that isnt a knock towards the pilot at all, so let me clear that right off, but actual conditions and what he was doing and how experienced he is with DCS in general, I can imagine how awkward it might feel to fly DCS after flying the real thing just based on the lose of feeling you get from RL to sim.

It's not just his statement, but also from videos I've seen on Youtube of cockpit cams inside the A-10, it's fairly clear that they can pull back on the stick and turn very tightly, and in DCS trying to do the same thing will get you stalling and cause the wings to drop.

I know it's very difficult to tune very precise aerodynamic formulas to adjust to something which comes down to a gut feeling, but I was hoping to bring this up so someone who knows a lot more about aerodynamics than me could find the way to describe the discrepancy mathematically.

Are you guys talking about FM and engine? or FM only? Not sure about the FM, and stalls, but about the engine, we could say we have enough source to get their attention, no? what I mean is, this thread was opened based on real documentation, and not watching a video, so my question is, do we have enough source? I'm asking this because I am curious..

I'd like to clarify, I'm not saying the FM is wrong because I saw it in a video, I'm saying it's wrong because an A-10C pilot said so, and I explained why I believe him.

If the FM is wrong, then the data to explain how it is wrong is out there, and if we're opening up performance data as it relates to the engine, performance data as it relates to AoA stall parameters should be there too, and I'm drawing attention to it so someone who can explain it better can give the numbers needed to hopefully allow ED to fix it.

That's unfortunate because the current engine behavior is wrong.

Most of the YT Videos are of Training w/ Less Fuel, Less Take off Weight, etc etc.

Drop the A-10C in DCS to 50-60% Fuel and only Say Half the Gun Ammo, and She'll turn easier and not bleed speed when you pull back on the stick,.

Most of the YT/GoPro Camera Footage I've seen are of Airshow Demos, and Training Range Runs, in which case, likely not 100% Max Take Off Weight.