Flying at 9000 feet with OAT = 5C. Encountered light rain. After a few minutes the MP started dropping and I could not maintain altitude. Pitot heat was on. I hit 'H' to turn on Alt Air and Prop de-ice, but these did not help. I see no other ice control switches in the cockpit. I tried assigning an additional key combo to "de-ice" in settings but this did not help either. Mixture settings and prop rpm were properly adjusted for level cruise at this altitude.

 

In the Beech Baron, this problem was easily fixed by turning on a set of anti-ice switches in the VC. MP would almost instantaneously return to normal.

 

Is there anything I can do with the Mooney in this situation other than turn around and land? If not I'll have to avoid this aircraft.

 

Thanks

Fsx bug. Try the shortcut for carb heat. I'm guessing the mooney is fuel injected so it wouldn't have one but turning it on should work.

Thank you for the suggestion. The list of keyboard commands shows carb heat as 'H' (which apparently does other things in the Mooney). I'll try reflying and see if it helps.

I've had the exact same problem. yes the key board for carb heat does the trick. The alt air on the aircraft panel does nothing.

It's a problem with the coding in the MicroSoft Flightsim engine, it treats all piston engines as carbureted, so even with a fuel injected engine you will still get the carburetor icing effect.  Best bet is to use the keyboard command for carb heat.

Pocketwatch50

 

On reflight I turned on the "carb heat" and prop de-ice. Helped a bit but I still had to descend to 5,000 ft to regain full engine power. Needed the carb heat the rest of the flight until landing, even though I was out of the icing conditions. Speed was highly variable on approach. I found I had to constantly adjust the throttle to maintain 100 kts. Normally only 19-20" MP needed - I was all over from 20-30".

 

Seems like a buggy flight model...

Try the Carenado Mooney - it is a lot better... and looks a lot better too!