FS9. FSX & P3D CTD Guide - NEW!
FSX / P3D Configuration Guide - UPDATED!
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5 replies to this topic
Posted 02 April 2012 - 07:57 AM
Did somebody experience the same...I was doing a short ILS flight from Munich to Innsbruck yesterday. To get over the alps I had to climb quite high ~9500 feet. Weather conditions were a few degrees below zero and rain/snow showers from time to time. During flight in moist air I suddenly lost power rapidely. The manifold pressure dropped. Having experienced similar situatinos with the standard C172 already I pressed the h-key, which if I'm not wrong is the carb heat in the C172. The manifold pressure increased again and power came back. I realised that by pressing the h key on the keyboard, the switch with the label "Prop Deice" was turned on and off again.So is the prop deice actually linked to the carb heating and does the A36 have a carborator at all. I always thought it has fuel injection? Or did I experience something different like propeller icing that somehow forced my manifold pressure down?Would be happy on any clues that can shed some light on that.Best,Rafael
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Posted 02 April 2012 - 08:40 AM
Yup, the A36 has a fuel injected engine, so no carburettor. I don't have the Carenado A36, so I don't know what is modeled, but, theoretically you can still experience intake icing problems with fuel injected aircraft, although I can't see how carb heat would solve that when there is no carb to heat. So such problems would not be carb icing of course, but what can happen, is that the induction air can freeze up the throttle mechanism. This phenomenon may have been modeled by using the capability to do carb icing in FS, although that is just a guess on my part.If it had been a real aeroplane, I'd have said it was most likely to be a coincidence, with crap in the fuel blocking the injectors being the cause, but I don't think FS models fuel contamination. Prop de-icing does what it says on the tin, so it would not likely do anything to the engine itself unlesss linked to some fancy after market system, although the build up of ice on the prop could affect how the engine acted in terms of the amount of thrust you got for a certain throttle setting, and if it was especially bad icing, it might even make the engine run rough owing to an out of blance prop, which may just possibly be what is modeled.On a side note relating to non fuel injected aero engines, it is worth bearing in mind that you can actually get carb icing even in warm weather, since the action of a carurettor sucks heat from the surrounding air, leaving moisture that can freeze and cause icing anyway, even on a nice warm sunny day, but you don't get that phenomenon with fuel injection.Not sure what else it might be.Al
Posted 14 April 2012 - 07:33 PM
Same problem here.. the H key activates Prop De-Ice.. but not heat the carburator.. that seems to be a problem with FSX. Is there another solution? Because each time I am for at 9500 feet I have to go down until reaching 0º or above. Don't know what can happen when flying in weathers with below 0º in ground.. I could not start the engine with this problem.