correct as is Strange flight behavior when push nose down after a climbing

[kiss4luna]

I think this is a flight model related bug and it happens many times.

1. gain enough speed.

2. do a high AOA (i think maybe 70 to 80) climb until the speed reduces to below 300.

3. push the stick to make a nose down.

Then it may happen. Suddenly it sounds like an engine failure, the engines look fine but feel no power at all. And the jet becomes like a leaf, can't be controlled.

This bug can be triggered on the FC3 F-15C. I also tried DCS F-16C but it flies totally normal.

f18c_bug.trk

[BIGNEWY]

Hi 

I will check with the team however you are in inverted flight and negative G for an extended period and this is inducing the low oil pressure.  

[Dragon1-1]

The proper technique is to roll inverted and pull after such a climb, for precisely this reason. Most jets don't like negative Gs very much, and neither do the pilots.

[BIGNEWY]

We have taken a look, you do not switch flaps to AUTO so when you start to slow down and push forward on the stick speeds reach below 243kts, this puts the FCS logic into landing configuration. Follow the correct procedure and you will have better results, but this is not a bug. 

thank you 

 

[kiss4luna]

On 3/3/2025 at 7:28 PM, BIGNEWY said:

We have taken a look, you do not switch flaps to AUTO so when you start to slow down and push forward on the stick speeds reach below 243kts, this puts the FCS logic into landing configuration. Follow the correct procedure and you will have better results, but this is not a bug. 

thank you 

 

 

I think I may forget about the flaps before. I tried some flight and yes turn it to auto solves the problem. I never thought modern jets can't fly negative G. Anyway, thanks.