vadupleix Posted April 29, 2020 Share Posted April 29, 2020 Hello All, I was flying at 27000-29000 ft at M1.4 today (on my way home after a zoom climb, if you wonder why I’m so fast at this altitude) and I put my throttle at idle position. Then I hear a “Bang” noise, then another one after about 30 seconds, then repeat every 30 seconds-ish. There’s no cockpit shaking nor stick shaking (I’m using a FFB stick), just this “Bang” noise. It goes away if I push the throttle back to mil position. I’m not sure if this is a compressor stall? If so, how is that possible? Because in my understanding the engine won’t go below certain power setting (possibly mil power?) when supersonic, regardless of the throttle position. In fact I don’t observe any change in my engine RPM/TIT/FF indicator when I move the throttle between idle and mil. Would love to know the reason behind this! Thanks in advance. Link to comment Share on other sites More sharing options...
draconus Posted April 29, 2020 Share Posted April 29, 2020 Have you messed with any of these switches: Throttle temp, Throttle mode, Inlet ramps, Airstart, Eng mode? Win10 i7-10700KF 32GB RTX3060 Rift S T16000M TWCS TFRP FC3 F-14A/B F-15E CA SC NTTR PG Syria Link to comment Share on other sites More sharing options...
vadupleix Posted April 29, 2020 Author Share Posted April 29, 2020 Have you messed with any of these switches: Throttle temp, Throttle mode, Inlet ramps, Airstart, Eng mode? Negative. Link to comment Share on other sites More sharing options...
BonerCat Posted April 30, 2020 Share Posted April 30, 2020 If you've taken any battle damage, it could've messed with your engine and inlet systems, but that's the only thing i can really think of Modules: F-14, F-15C, F-16C, F/A-18C, M-2000C, A-10C, A-10C II, AV-8B N/A, MiG-29, Su-33, MiG-21 Bis, F-5E, P-51D, Ka-50, Mi-8, Sa 342, UH-1H, Combined Arms Maps and others: Persian Gulf, Syria, Normandy, WWII Assets, NS 430 + Mi-8 NS 430 Link to comment Share on other sites More sharing options...
grant977 Posted April 30, 2020 Share Posted April 30, 2020 Ra do failures on? I had the starboard engine controller fail once putting it in secondary mode 5 mins after leaving the boat and got into compressor stalls. Link to comment Share on other sites More sharing options...
fat creason Posted April 30, 2020 Share Posted April 30, 2020 You were most likely in SEC mode or had some problem with the AICS, but not enough info here to really tell Systems Engineer & FM Modeler Heatblur Simulations Link to comment Share on other sites More sharing options...
r4y30n Posted May 1, 2020 Share Posted May 1, 2020 That was my first thought when stumbling on this thread. The manual (both HB's and NATOPS, if I recall) suggests that any kind of hiccup that can happen on the F110 will only happen under SEC or otherwise degraded function. Seems like GE knew what they were doing when they designed these engines. Link to comment Share on other sites More sharing options...
vadupleix Posted May 1, 2020 Author Share Posted May 1, 2020 You were most likely in SEC mode or had some problem with the AICS, but not enough info here to really tell Is there a possibility that something was damaged during the zoom climb? I was in full burner climb from 40000 to 100000 ft and retarded throttle only after I reached peak altitude, will that cause any damage to the engine? Link to comment Share on other sites More sharing options...
ChockP51 Posted May 1, 2020 Share Posted May 1, 2020 I got some "bang" compressor stall too. Happened occasionally when I dive from high altitude with throttle idle and pull some moderate G (3 to 7 g-ish) at around Mach 1.2-1.4. Engine operate in PRI mode and Ramp is not stow. Link to comment Share on other sites More sharing options...
r4y30n Posted May 1, 2020 Share Posted May 1, 2020 What's your RPM? Did it actually drop to idle or did it hold near MIL? Link to comment Share on other sites More sharing options...
ChockP51 Posted May 1, 2020 Share Posted May 1, 2020 Around mill rpm. Idle lockup work flawlessly. Link to comment Share on other sites More sharing options...
vadupleix Posted May 2, 2020 Author Share Posted May 2, 2020 What's your RPM? Did it actually drop to idle or did it hold near MIL? Mil for me as well Link to comment Share on other sites More sharing options...
Scrape Posted May 2, 2020 Share Posted May 2, 2020 Had this been real life it's very possible that it could have been a compressor stall. Compressor stalls can and do happen for a myriad of conditions on fighter jets. A compressor stall doesn't mean anything broke, or had degraded performance. It doesn't mean the engine was damaged before or after. I suspect that HB did their due diligence when coding, and that means certain conditions make the engine "unhappy" are possible in DCS. Also mirroring a bit of real life, these conditions may prove difficult to reproduce. I've encountered a couple myself in the sim, and I think it's pretty cool. "It's amazing, even at the Formula 1 level how many drivers still think the brakes are for slowing the car down." VF-2 Bounty Hunters [sIGPIC][/sIGPIC] Virtual Carrier Strike Group 1 | Discord Link to comment Share on other sites More sharing options...
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