VFA41_Lion Posted July 17, 2020 Share Posted July 17, 2020 Hi, see attached track. I disable OBOGS switch on the ground and set OXYGEN flow to disabled. No hypoxia at any altitude. Is it not implemented or a bug? Thanks. Track uploaded, you guys need to increase your .trk file upload size. https://www.mediafire.com/file/4zg05c37jufxj97/hornet_flight_model_****y.trk/file Link to comment Share on other sites More sharing options...
Swift. Posted July 17, 2020 Share Posted July 17, 2020 Side note: the track upload size is where it is because you will be very hard pressed to exceed that by using a proper testing mission. Larger tracks with more objects are more easily corrupted so are best avoided for testing. 476th Discord | 476th Website | Swift Youtube Ryzen 5800x, RTX 4070ti, 64GB, Quest 2 Link to comment Share on other sites More sharing options...
Raisuli Posted July 17, 2020 Share Posted July 17, 2020 Really? I mapped oxygen flow to an axis, set it to 100%, and passed out on the ground. Wags said it wasn't a bug, I bit my tongue. 1 Link to comment Share on other sites More sharing options...
VFA41_Lion Posted July 17, 2020 Author Share Posted July 17, 2020 I prefer to do my testing sessions from cold and dark starts, so that takes a bit extra time. Oxygen knobs and switches when clicked/rotated with mousewheel dont work but binding it to an axis does? :huh: Link to comment Share on other sites More sharing options...
randomTOTEN Posted July 18, 2020 Share Posted July 18, 2020 I prefer to do my testing sessions from cold and dark starts, so that takes a bit extra time. That's extra time we have to run your track before we actually get to the bug report. It also gives the track more time to accumulate errors... which will exponentially increase if we have to accelerate time to bypass your cold start... which is not related to the problem. Honestly I don't really want to watch a 30 minute track just to see you left the cockpit pressurized... Link to comment Share on other sites More sharing options...
VFA41_Lion Posted July 18, 2020 Author Share Posted July 18, 2020 That's extra time we have to run your track before we actually get to the bug report. It also gives the track more time to accumulate errors... which will exponentially increase if we have to accelerate time to bypass your cold start... which is not related to the problem. Honestly I don't really want to watch a 30 minute track just to see you left the cockpit pressurized... Unless you are on the Eagle Dynamics F/A-18 development team or part of the QA testing team, I don't really care what you think. Nothing personal. :) That being said, the entire track is thirteen minutes. The F/A-18 as it stands doesn't require even remotely 30 minutes to startup and takeoff. Link to comment Share on other sites More sharing options...
randomTOTEN Posted July 18, 2020 Share Posted July 18, 2020 Nothing personal. :) No worries :thumbup: Link to comment Share on other sites More sharing options...
ED Team BIGNEWY Posted July 20, 2020 ED Team Share Posted July 20, 2020 Hi My understanding is the cockpit is still pressurised, so you will only blackout if your canopy is removed also thanks Forum rules - DCS Crashing? Try this first - Cleanup and Repair - Discord BIGNEWY#8703 - Youtube - Patch Status Windows 11, NVIDIA MSI RTX 3090, Intel® i9-10900K 3.70GHz, 5.30GHz Turbo, Corsair Hydro Series H150i Pro, 64GB DDR @3200, ASUS ROG Strix Z490-F Gaming, HP Reverb G2 Link to comment Share on other sites More sharing options...
FoxTwo Posted July 20, 2020 Share Posted July 20, 2020 Hi My understanding is the cockpit is still pressurised, so you will only blackout if your canopy is removed also thanks Really? That contradicts the reports of the failed OBOGS causing hypoxia and possibly contributing to pilot deaths. https://www.stripes.com/news/navy-4-f-a-18-pilot-deaths-could-be-tied-to-oxygen-system-failures-1.473811 At the very least, leaving the OBOGS disabled should cause hypoxia at altitude even if the cabin remains pressurized Link to comment Share on other sites More sharing options...
randomTOTEN Posted July 20, 2020 Share Posted July 20, 2020 At the very least, leaving the OBOGS disabled should cause hypoxia at altitude even if the cabin remains pressurized It used to be that way but I think they changed it. https://forums.eagle.ru/showthread.php?t=252871 https://forums.eagle.ru/showthread.php?t=216672 https://forums.eagle.ru/showthread.php?t=213998 https://forums.eagle.ru/showthread.php?t=213383 Hi In DCS we dont have a mask on off state. if the pilot has a mask it is assumed on, if the pilot does not have a mask it is assumed off. turning the oxygen off if the pilot has a mask will lead to hypoxia. thanks Perhaps they now assume the pilot removes the disabled/failed mask if cockpit air pressure is enough to breathe normally? Link to comment Share on other sites More sharing options...
FoxTwo Posted July 21, 2020 Share Posted July 21, 2020 So I played around with this a bit. I started a mission and climbed to 50,000 feet with oxygen completely off and OBOGS disabled. Cockpit pressure gauge indicated approximately 18,000ft. This is equivalent to the extreme zone for mountain medicine. Not a great place to be and you're going to have a bad time but you don't start getting into the loss of vision and consciousness until the death zone at 26,000ft, which would probably be like around... 60-65,000ft? Above the Armstrong Limit anyway, at which you'd be required to wear a pressure suit. Just for giggles I popped the canopy and started getting tunnel vision as expected. Turning the oxygen and OBOGS system on had no effect which at that altitude probably makes sense. In short, you're probably not having a great time with the oxygen off at altitude but I don't know how you model a headache in DCS. Link to comment Share on other sites More sharing options...
Ahmed Posted July 22, 2020 Share Posted July 22, 2020 (edited) Hi My understanding is the cockpit is still pressurised, so you will only blackout if your canopy is removed also thanks The cockpit is pressurised following a certain schedule. Flight altitudes in excess of ~30.000ft result in cabin altitudes in excess of 10.000 ft according to NFM-000. That said, the cabin altitudes listed there are not high enough as to cause a rapid onset of hypoxia and would normally require prolonged exposure to cause any impairing hypoxia (>30 minutes?) Is canopy damage simulated and will it cause a cockpit decompression and hypoxia? Edited July 22, 2020 by Ahmed Link to comment Share on other sites More sharing options...
Checkmate Posted June 2, 2022 Share Posted June 2, 2022 I tried flying around at 40,000ft for over 30 minues and didn't notice anything. Shouldn't I pass out? I have seen the affect in other aircraft and looks pretty cool. Things start to look bury, then color goes away, and then my vision begins fade out. But in the F/A-18C nothing happens. I was wonder if the OBOGS system is modeled or if something is not working that used to. 3 Link to comment Share on other sites More sharing options...
Minsky Posted June 2, 2022 Share Posted June 2, 2022 1 hour ago, Checkmate said: I was wonder if the OBOGS system is modeled. Kinda https://forum.dcs.world/topic/240908-no-bugoxygen-is-always-on-in-the-hornet-regardless-of-knobswitch-position/?do=findComment&comment=4364012 1 Dima | My DCS uploads Link to comment Share on other sites More sharing options...
Tholozor Posted June 2, 2022 Share Posted June 2, 2022 Above 23~24kft, the cabin is pressurized to 8kft. Above 30kft, the cabin is pressurized between 10~12kft. Above 40kft, the cabin is pressurized between 15~17kft. 1 REAPER 51 | Tholozor VFA-136 (c.2007): https://www.digitalcombatsimulator.com/en/files/3305981/ Arleigh Burke Destroyer Pack (2020): https://www.digitalcombatsimulator.com/en/files/3313752/ Link to comment Share on other sites More sharing options...
Minsky Posted June 2, 2022 Share Posted June 2, 2022 (edited) 2 minutes ago, Tholozor said: Above 40kft, the cabin is pressurized between 15~17kft. Yeah, except in DCS you can disable OBOGS and fly at 40K for hours without a trace of hypoxia. The only way to blackout is to jettison the canopy. Edited June 2, 2022 by Minsky Dima | My DCS uploads Link to comment Share on other sites More sharing options...
Rissala Posted June 2, 2022 Share Posted June 2, 2022 17 hours ago, Minsky said: Yeah, except in DCS you can disable OBOGS and fly at 40K for hours without a trace of hypoxia. The only way to blackout is to jettison the canopy. Yeah the cabin is pressurized?? And if you dump the cabin air you pass out. Same reason why you don't pass out on an airliner. The oxygen is there for the pilot to help with high g strain, high altitude and in the case of pressure loss in the cabin. Link to comment Share on other sites More sharing options...
Minsky Posted June 2, 2022 Share Posted June 2, 2022 1 hour ago, Rissala said: Yeah the cabin is pressurized?? And if you dump the cabin air you pass out. Same reason why you don't pass out on an airliner. Yeah, except at 40,000 ft the cabin is pressurized to 15,000-17,000 ft. That's at least two times higher than on any airliner. You'll need oxygen supply to not pass out that high. Dima | My DCS uploads Link to comment Share on other sites More sharing options...
=475FG= Dawger Posted June 2, 2022 Share Posted June 2, 2022 13 minutes ago, Minsky said: Yeah, except at 40,000 ft the cabin is pressurized to 15,000-17,000 ft. That's at least two times higher than on any airliner. You'll need oxygen supply to not pass out that high. Not really. You will suffer some hypoxia effects but a healthy person will not pass out at that cabin altitude. 2 Link to comment Share on other sites More sharing options...
Minsky Posted June 2, 2022 Share Posted June 2, 2022 12 minutes ago, =475FG= Dawger said: Not really. You will suffer some hypoxia effects but a healthy person will not pass out at that cabin altitude. Alright, I stand corrected then. Dima | My DCS uploads Link to comment Share on other sites More sharing options...
Rissala Posted June 3, 2022 Share Posted June 3, 2022 16 hours ago, =475FG= Dawger said: Not really. You will suffer some hypoxia effects but a healthy person will not pass out at that cabin altitude. was about to say this as well people can climb everest without oxygen (28 000ft) if they are well trained and prepared for the average person, this will be on the edge of their ability to stay awake Link to comment Share on other sites More sharing options...
Ahmed Posted June 5, 2022 Share Posted June 5, 2022 There is a concept called TUC (Time of Useful Consciousness) that addresses this through tables, for example found here: Time of Useful Consciousness | SKYbrary Aviation Safety I quoted 30 minutes from these tables on my post above. However, as people above are commenting, a healthy individual won't suddenly pass out at these numbers. Link to comment Share on other sites More sharing options...
Recommended Posts