I have about had it with just about any aircraft engine configuration in FS needing carb. heat and I'll bet I am not alone. This BUG seems to show up with some (if not all) Jets, Turbojets, and Inject recip models as well as applicable engines that require it.Granted it is simple enough to use an assigned key for carb heat, but invariably without any panel indication I will forget whether I have it engaged or not. I also use my "H" key for heading reset and forget whether I have "Ctrl+H" or "Shift+H" as my alternate assignment (Yea, I know my memory leaves something to be desired, call it senior moments). In either case, being that there is no panel indication, trying each is pretty much guess work to wait and see if one looses power again or not.My latest irritation was with an F-86 Sabrejet flameout. Thererfore, I just copied from an aircraft that has this provision and installed it on the F-86 panel. I may start doing this on all of my aircraft regardless of type..I realize that real world this would cost a little bit of power, but in FS it is rather academic on any aircraft I have noticed so far.It would be nice if in the FSX.cfg, FS9.cfg, Aircraft.cfg, or Panel.cfg files a line item could be added to activate carb heat permanently where this would not be an issue. If anyone knows the proper file and what the text edit adder should be, I sure would appreciate the information.Respectfully:RTH

Hi.I've never used, nor needed to use, carburettor heat in FS9. How much of an effect does it have in the sim? (I always assumed it was a bit of poor and useless modelling, like the vast majority of FS9 rudders.)Regards,D

I have about had it with just about any aircraft engine configuration in FS needing carb. heat and I'll bet I am not alone. This BUG seems to show up with some (if not all) Jets, Turbojets, and Inject recip models as well as applicable engines that require it.Granted it is simple enough to use an assigned key for carb heat, but invariably without any panel indication I will forget whether I have it engaged or not. I also use my "H" key for heading reset and forget whether I have "Ctrl+H" or "Shift+H" as my alternate assignment (Yea, I know my memory leaves something to be desired, call it senior moments). In either case, being that there is no panel indication, trying each is pretty much guess work to wait and see if one looses power again or not.My latest irritation was with an F-86 Sabrejet flameout. Thererfore, I just copied from an aircraft that has this provision and installed it on the F-86 panel. I may start doing this on all of my aircraft regardless of type..I realize that real world this would cost a little bit of power, but in FS it is rather academic on any aircraft I have noticed so far.It would be nice if in the FSX.cfg, FS9.cfg, Aircraft.cfg, or Panel.cfg files a line item could be added to activate carb heat permanently where this would not be an issue. If anyone knows the proper file and what the text edit adder should be, I sure would appreciate the information.Respectfully:RTH

Carb heat has no effect on jets at all - for so many reasons: they have no carburetors, venturi icing isn't modeled in FS and if it were it doesn't apply to jets, etc... I'm not sure what your problem is with jets and injected aircraft, but it sure as heck isn't carb heat.DJ

I have about had it with just about any aircraft engine configuration in FS needing carb. heat and I'll bet I am not alone. This BUG seems to show up with some (if not all) Jets, Turbojets, and Inject recip models as well as applicable engines that require it.Granted it is simple enough to use an assigned key for carb heat, but invariably without any panel indication I will forget whether I have it engaged or not. I also use my "H" key for heading reset and forget whether I have "Ctrl+H" or "Shift+H" as my alternate assignment (Yea, I know my memory leaves something to be desired, call it senior moments). In either case, being that there is no panel indication, trying each is pretty much guess work to wait and see if one looses power again or not.My latest irritation was with an F-86 Sabrejet flameout. Thererfore, I just copied from an aircraft that has this provision and installed it on the F-86 panel. I may start doing this on all of my aircraft regardless of type..I realize that real world this would cost a little bit of power, but in FS it is rather academic on any aircraft I have noticed so far.It would be nice if in the FSX.cfg, FS9.cfg, Aircraft.cfg, or Panel.cfg files a line item could be added to activate carb heat permanently where this would not be an issue. If anyone knows the proper file and what the text edit adder should be, I sure would appreciate the information.Respectfully:RTH

Pitot heat maybe? If so then the default is Shift+H. I've never found any config entries that would enable it. These are the times when I really miss Opa, R.I.P.

Interesting!I am a little surprised that there has not been another reply of confirmation as there are many posts regarding this issue.For those of you that are responding that there is no such thing in "Jets" and that you have never seen such a thing, hang in there, YOU WILL! This is a known issue and is not unique to my system or anything I am doing. You may get away with it for a long time, but when conditions are right you have a surprise in store for you.Granted real world there is no such thing, but it sure is in FS. There have been a number of posts regarding this issue. Usually the post will not know what the problem is and will fall into a catagory of some poor soul asking why power is lost or engines shut down at a high altitude. "Real Weather" conditions have to be applicable of course. The helpful response is almost always apply carb. heat no matter how silly it may appear to be. It works and engines continue to purr. The fact that Jets (including others) real world do not have this issue is exactly my point.Presently, make a long high altitude flight in the F86-Sabre Jet as an example. As I said in my original post, this is the last bird that bit me (there are others). Usually power fades for quite a while before the engines shut down and if you can catch it in time applying carb. heat restores full power (yea I know, well almost full power anyway). However, with the F-86 it caught me off guard and I had a total flameout. Either I didn't notice that I was loosing power, or it is pretty sudden with this bird of a feather. Descend to a lower altitude, do an airstart, climb back up to altitude and use carb. heat, and there is no issue.Edit: Also note that with many other aircraft, (meaning those that should not require carb heat), power will be restored without doing anything else when carb. heat is applied).Happy flying:RTH

I have about had it with just about any aircraft engine configuration in FS needing carb. heat and I'll bet I am not alone. This BUG seems to show up with some (if not all) Jets, Turbojets, and Inject recip models as well as applicable engines that require it.Granted it is simple enough to use an assigned key for carb heat, but invariably without any panel indication I will forget whether I have it engaged or not. I also use my "H" key for heading reset and forget whether I have "Ctrl+H" or "Shift+H" as my alternate assignment (Yea, I know my memory leaves something to be desired, call it senior moments). In either case, being that there is no panel indication, trying each is pretty much guess work to wait and see if one looses power again or not.My latest irritation was with an F-86 Sabrejet flameout. Thererfore, I just copied from an aircraft that has this provision and installed it on the F-86 panel. I may start doing this on all of my aircraft regardless of type..I realize that real world this would cost a little bit of power, but in FS it is rather academic on any aircraft I have noticed so far.It would be nice if in the FSX.cfg, FS9.cfg, Aircraft.cfg, or Panel.cfg files a line item could be added to activate carb heat permanently where this would not be an issue. If anyone knows the proper file and what the text edit adder should be, I sure would appreciate the information.Respectfully:RTH

If the F86 that flamed out on you was the Section8 F86 then engine inlet icing is modelled. You will see just above the landing gear indicators a switch that deploys an anti-icing screen. It is clickable but it is also activated by the default carb heat switch. If you are flying in icing conditions and do not use it after about 20 minutes or so you have a good chance of a flame out. I learned that the hard way! LOLI am absolutely no expert on the simulation of anti/deicing in FS9 but in my experience there are some aircraft in FS9 that do utilize the carb heat function to simulate some form of anti-icing and there are some piston engine aircraft that do somewhat realistically simulate carb icing. Both the MAAM DC3/R4D and Milton Shupe's Beech 18 have functioning carb heat for example...My practice is to assume that the "carb heat" activates de-icing of some form on jets/turbo props/fuel injected engines and carb heat in carburettor fed recip engines. If it doesn't do anything, there's no harm done and if it does, using it is a good idea. As I have the switch keyed to a GF module alongside of the pitot heat I use it whenever there are likely icing conditions. But as many "turbo props" in FS9 actually use a recip engine model, using the "carb heat" as anti-icing will cause significant power loss so you need to experiment.BTW, if you are every likely to fly a conventional (not fuel-injected) recip aircraft in the real world like a 172, it is a very good idea to develop an ingrained habit of using carb heat just prior to take off and during approach until short final. Might save you a world of hurt some day

Thanks for the good information. Makes sense!RTH

If the F86 that flamed out on you was the Section8 F86 then engine inlet icing is modelled. You will see just above the landing gear indicators a switch that deploys an anti-icing screen. It is clickable but it is also activated by the default carb heat switch. If you are flying in icing conditions and do not use it after about 20 minutes or so you have a good chance of a flame out. I learned that the hard way! LOLI am absolutely no expert on the simulation of anti/deicing in FS9 but in my experience there are some aircraft in FS9 that do utilize the carb heat function to simulate some form of anti-icing and there are some piston engine aircraft that do somewhat realistically simulate carb icing. Both the MAAM DC3/R4D and Milton Shupe's Beech 18 have functioning carb heat for example...My practice is to assume that the "carb heat" activates de-icing of some form on jets/turbo props/fuel injected engines and carb heat in carburettor fed recip engines. If it doesn't do anything, there's no harm done and if it does, using it is a good idea. As I have the switch keyed to a GF module alongside of the pitot heat I use it whenever there are likely icing conditions. But as many "turbo props" in FS9 actually use a recip engine model, using the "carb heat" as anti-icing will cause significant power loss so you need to experiment.BTW, if you are every likely to fly a conventional (not fuel-injected) recip aircraft in the real world like a 172, it is a very good idea to develop an ingrained habit of using carb heat just prior to take off and during approach until short final. Might save you a world of hurt some day

My practice is to assume that the "carb heat" activates de-icing of some form on jets/turbo props/fuel injected engines and carb heat in carburettor fed recip engines. If it doesn't do anything, there's no harm done and if it does, using it is a good idea. As I have the switch keyed to a GF module alongside of the pitot heat I use it whenever there are likely icing conditions. But as many "turbo props" in FS9 actually use a recip engine model, using the "carb heat" as anti-icing will cause significant power loss so you need to experiment.

Good advice. Thanks. I've noticed that flipping on the Intake De-Ice switch in Flight1's C441 produces a marked drop in power. I shall have to see tonight whether the Carb Heat key-command is mapped to that switch; I've always used the mouse.Strictly in FS, does leaving carb heat permanently on have any other detrimantal effect?Regards,D

Good advice. Thanks. I've noticed that flipping on the Intake De-Ice switch in Flight1's C441 produces a marked drop in power. I shall have to see tonight whether the Carb Heat key-command is mapped to that switch; I've always used the mouse.Strictly in FS, does leaving carb heat permanently on have any other detrimantal effect?Regards,D

Unless it really is functioning as carb heat in a recip engine, I don't think it has any detrimental effects. (The "detriment" is a small loss of power as warm air is less dense and so the fuel/air mixture is decreased) In most cases it seems to function as turning on "deicing." Whether that's functional or not I'm never sure but other than the power drop in a recip engine (or recip engine masquerading as a turboprop) then I can't think of any negative effect in most addons. One perhaps is the DF 727 which not only models deicing realistically, you can cause duct overheating by using deicing when it's not needed, so on that one I do not use the switch but apply deicing as needed where needed via the 2nd officer/flight engineer panel.CheersIan

Hi again.I had a quick play last night with the carb heat keyboard command.In the keyboard assignment menu (Alt+O, C, A) the command for carb heat is listed as 'Carb heat/eng anti-ice on/off' and indeed in Flight1's C441, keying that assignment toggles the switches for surface boots, L & R prop de-ice and L & R engine inlet de-ice all at the same time. They can still be set individually with the mouse. That cleared up the question nicely. The biggest hint is in MS's name for that keyboard assignment.Leaving it switched on for a couple of hours' flight had no effect on the plane other than the reduction in power, and that's of no consequence as fuel is free!Kind regards,D