January 24, 201610 yr AFAIK, the two main icing effects built into the sim itself are pitot tube icing, which will cause indicated airspeed to drop to zero, and carburetor icing (affecting piston engine GA aircraft) where the engine power will start to decrease unless carb heat is activated. I'm not sure if the carb icing effect (loss of engine power) applies to turboprops or jet engines - it might. I don't know if generic airframe icing effects exist in FSX or P3D. Both the Leonardo MADDOG, and Majestic Q400 do have custom icing routines that will progressively degrade the performance of the flight model and engines when flying in icing conditions, unless the proper anti-icing systems are activated in a timely fashion. Both aircraft will show visible ice accumulation on the windshield when the icing model is active. Jim BarrettLicensed Airframe & Powerplant Mechanic, Avionics, Electrical & Air Data Systems Specialist. Qualified on: Falcon 900, CRJ-200, Dornier 328-100, Hawker 850XP and 1000, Lear 35, 45, 55 and 60, Gulfstream IV and 550, Embraer 135, Beech Premiere and 400A, MD-80.
January 24, 201610 yr Looking under the details on the product page for ASN found here it does mention icing so that's cool!
January 24, 201610 yr After reading this thread, and I like to follow procedures and fly by the book, I started using engine anti ice a couple of days ago. In my next few flights I had 3 CTD's all with the ntdll.dll labeled as the cause. The only thing I had changed in P3D V3.1 in the last few days, was switching on the engine anti ice when appropriate. I left it off today, and flew a 2 hour flight with no problems at all. Anyone else experience this?
January 24, 201610 yr Hi there Bob, I had an issue with CTDs a couple of weeks ago and in my case I found a thread somewhere (might have been here at Avsim or maybe over in LM's forums). Anyway in that thread someone suggested to put AlwaysFullLoad=1 under the Main section in Prepar3d.cfg and in my case it seemed to have cured my CTDs. Do note though in my case I mostly saw terrain.dll and not ntdll.dll so in your case maybe it will do no good at all but worth a try maybe if you don't find anything else to try.
January 24, 201610 yr After reading this thread, and I like to follow procedures and fly by the book, I started using engine anti ice a couple of days ago. In my next few flights I had 3 CTD's all with the ntdll.dll labeled as the cause. The only thing I had changed in P3D V3.1 in the last few days, was switching on the engine anti ice when appropriate. I left it off today, and flew a 2 hour flight with no problems at all. Anyone else experience this? Bob, Did you by chance recently install the newly released MyTraffic 6a? I've seen reports of this failure elsewhere. And it's happening to me as well. Walter Meier
January 24, 201610 yr Bob, Did you by chance recently install the newly released MyTraffic 6a? I've seen reports of this failure elsewhere. And it's happening to me as well. Yes I did, and it was about the same time frame where I started having issues.
January 25, 201610 yr Yes I did, and it was about the same time frame where I started having issues. We've really strayed from the original topic, so I'll keep it short and just say that I'll do some more troubleshooting on this issue starting tomorrow before I contact support at My Traffic. I'll let you know what I find. Walter Meier
January 25, 201610 yr Just in case anyone is doubting that FS does have a limited model of structural ice...I went and tested it. I created a cloud layer with "Severe" icing. Stabilized at holding speed, ~62% N1 holds 230 KIAS. At this point I've been in the ice for about 2 minutes, as indicated on the chronometer. Here, we can see that after staying in the ice for over 20 minutes, our speed has significantly decayed - almost to the low speed caution. And here's what happens after after I turned on both TAI and WAI - the aircraft easily accelerated past 230 KIAS, indicating that I'd actually picked ice up already in the first picture. Joe Sherrill
January 25, 201610 yr Just in case anyone is doubting that FS does have a limited model of structural ice...I went and tested it. I created a cloud layer with "Severe" icing. Stabilized at holding speed, ~62% N1 holds 230 KIAS. At this point I've been in the ice for about 2 minutes, as indicated on the chronometer. Here, we can see that after staying in the ice for over 20 minutes, our speed has significantly decayed - almost to the low speed caution. And here's what happens after after I turned on both TAI and WAI - the aircraft easily accelerated past 230 KIAS, indicating that I'd actually picked ice up already in the first picture. Very limited modelling of icing and not very well simulated... Using TAI and Wing Anti-Ice to remove ice would have no impact on your indicated airspeed. Your IAS comes from both ADIRU's which are fed information by the Probe's and Static ports. Now if you turned the probe heat off they would most likely freeze in icing conditions then you'd get erroneous IAS readings!
January 25, 201610 yr Very limited modelling of icing and not very well simulated... Using TAI and Wing Anti-Ice to remove ice would have no impact on your indicated airspeed. Your IAS comes from both ADIRU's which are fed information by the Probe's and Static ports. Now if you turned the probe heat off they would most likely freeze in icing conditions then you'd get erroneous IAS readings! He wasn't saying he had erroneous IAS. Holding a constant N1, icing will result in extra weight and drag/loss of lift that will cause your actual airspeed to bleed off. Ben P3D 4.3, Windows 10/64 bit, Intel 6700k @ 4.7 air-cooled, NVidia 2080 Ti Founders Edition, ASUS Rog Maximus VIII Ranger, 16GB G.Skill Ripjaws DDR4 @3200, Phanteks Anthoo Pro Series Case, Samsung 950 Pro M.2 500GB, Sandisk 1TB SATA, Seagate 2TB Hybrid Drive, Cooler Master 700W, 40-inch Samsung 4k TV
January 25, 201610 yr Icing will result in extra weight and drag/loss of lift that will cause your actual airspeed to bleed off. Ben I completely agree with you and you might see big performance gains if you shed large amounts of ice on a small aircraft in flight but not to the extent you see here. If icing caused a 737-800 to lose 70kts IAS at the same rated N1 it wouldn't be flying that's for sure! Severe icing really can have a detrimental impact on aircraft performance, especially at low speeds no matter what the aircraft. I just wanted to reiterate that if a 737-800 had enough icing on its wing to cause a 70kt reduction in IAS due to drag and additional weight at the same rated thrust you would've fallen out of the sky way before getting to 163kts! I've flown in Moderate Icing/borderline severe and removed quite a bit of ice from the Wing (all you can see from the -800 flight deck) and in doing so have noticed no significant changes in aircraft performance, certainly not to the degree show here! The TAI and Wing-Anti Ice in this instance certainly wouldn't remove enough ice (Drag and Weight) to allow a 70kt recovery back to your original airspeed as seen here, hence my point saying it's not terribly realistic!
January 25, 201610 yr Just in case anyone is doubting that FS does have a limited model of structural ice (Emphasis probably should have been there in the original) The point was for those who were doubting that FS even modeled ice. I never claimed it was realistic, and apologies for the confusion of that was what was interpreted. Joe Sherrill
January 25, 201610 yr Confusion on my part as well Joseph. What you showed might be what you'd see if you had icing on your probes. Just wanted to point out you wouldn't see this sort of reduction in airspeed on an -800 caused by decreasing performance from additional icing on your wing and engine cowling. The PMDG NGX is brilliant and a fantastic representation of the real thing. I just like to point out where the NGX differs from the real world counterpart, in a this instance icing conditions!
January 25, 201610 yr Is there a warning system of some kind in the real bird if you start collecting ice?
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