Simviation Forums

I was flying a Cessna 310q, (I forget if its the O-470, or the Injected O-470 engines) And I reached a airlayer with temp of 0 degeees or less, and I started loosing MP, EGT went down, and CHT peaked.

But anyway Im pretty sure it was carb icing?

I dont kno what to do other then just loose a bit of alt. and get into warmer air, as there is no Carb heat. There is prop deicer, pitot tube heat, and another deice switch that seemed to have no effect.

There is also the engine cowls, but I leave them open all the time during engine operation, I couldnt see them causing the prob.


Ive also had this problem with the defualt M7 which I thought was fuel injected?

Any Ideas?

I only leave the engine cowls open when on the ground and then close them when it the air. Have you adjusted you engine mixture. Sounds like your pretty high in altitude and your mixture should be set accordingly.

Yes carb ice is one thing MS tended to ignore in Flight Simulator.

Anyone who flies for real in anything other than low level flight in sub tropical climates knows it isn't something you can ignore in real life.

There are many freeware aircraft that include this .... If I get the chance I will try to find one and report back ..

Yeah make sure you lean your mixture as you climb.  If there is a source for alternate air in the 310, use that as well.  In any case, I reckon the 310 is one of those "avoid icing at all costs" type aircraft. 

I was flying a Cessna 310q, (I forget if its the O-470, or the Injected O-470 engines) And I reached a airlayer with temp of 0 degeees or less, and I started loosing MP, EGT went down, and CHT peaked.

But anyway Im pretty sure it was carb icing?

I dont kno what to do other then just loose a bit of alt. and get into warmer air, as there is no Carb heat. There is prop deicer, pitot tube heat, and another deice switch that seemed to have no effect.

There is also the engine cowls, but I leave them open all the time during engine operation, I couldnt see them causing the prob.


Ive also had this problem with the defualt M7 which I thought was fuel injected?

Any Ideas?

What altitude were you at?  As you fly higher, the air is thinner, and it is normal to lose MP.

I was flying a Cessna 310q, (I forget if its the O-470, or the Injected O-470 engines) And I reached a airlayer with temp of 0 degeees or less, and I started loosing MP, EGT went down, and CHT peaked.

But anyway Im pretty sure it was carb icing?

I dont kno what to do other then just loose a bit of alt. and get into warmer air, as there is no Carb heat. There is prop deicer, pitot tube heat, and another deice switch that seemed to have no effect.

There is also the engine cowls, but I leave them open all the time during engine operation, I couldnt see them causing the prob.


Ive also had this problem with the defualt M7 which I thought was fuel injected?

Any Ideas?

What altitude were you at?

14,500 is getting pretty high for a non turbo piston engine.  You would be seeing probably only about 20 MP or less at that point.  Also what are you doing as far as mixture as you climb?

I would also suggest closing your cowl flaps. If they're open they let lots of heat off the engine get blown out. Closing them will help retain heat around the engine. (not sure if FS will recognize that point though.) :-/

[quote]14,500 is getting pretty high for a non turbo piston engine.

You need to put the pitot heat on before icing commences otherwise it is like trying to defrost a freezer whilst it is on using a toy hairdryer

You need to put the pitot heat on before icing commences otherwise it is like trying to defrost a freezer whilst it is on using a toy hairdryer

But isnt Pitot heat for speedometer, altimeter etc?

I didnt think it had anything to do with carb heat..

If I remember correctly Carb heat is something you use briefly while there IS ice in the carb. Using Carb heat when not needed reduces performance, (brings down MP a few points, and lowers overall engine RPM a few hundred..

However those memories are vaugue and if there anything close to my spelling there incorrect 

Pitot is for speed but by the sounds of things everything was going wrong. Normally my first thing to check is instruments.
If you're flying the Cessna at altitude you'll need carb heating on (if fitted), cowl flaps shut, lean the mixture and adjust the prop.
Cowl flaps should only be open when taxiing on the ground or coming in for landing. Otherwise the natual air flow around the engine should do the trick.

You can also try hitting the 'h' key on your keyboard to see if it does anything.  It's kind of a cheat, but if the problem clears up, then you know it has something to do with icing.  If your 310 doesn't have a carb heat knob, I would assume that it's modeled after a fuel-injected 310 model.  In any case, most aircraft that I know of have an alternate air switch, knob, or lever that you should use (I believe sometimes in FS this is tied to the carb heat/ice function, so pulling it sometimes fixes the problem.)  Finally, another thing you might consider with the 310 is to avoid flying it into icing conditions.  I could be wrong, but I don't think a real 310Q is certified to fly into known icing conditions.  The realistic option is to avoid flying into those areas too. 

Finally, another thing you might consider with the 310 is to avoid flying it into icing conditions.

I remember having read something of a treatise appended to an ice gauge I downloaded some time ago. This treatise went on and on about how messed up is the ice simulation under FS. The gist of it was that to simulate ice, FS only increments dynamically the planes weight in flight, instead of having any effect on how the flight surfaces work, which is quite entertaining, if you think to M$ greatest bombast: As Real As It Gets.

To worsen and already bad situation, under FS it's almost impossible to say if and when you are in an icing layer. Sure, using ActiveSky form V6.5 upward you KNOW that it gives you a high probability of icing in clouds (AND, for experience I can say, sometimes even clear air icing, but then, this happens in real life too, so no complaints here)... BUT, you MUST be using this add-on. If you use the haphazardly put together inbuilt online weather system of FS, you can never say.

For sure, if you enter in a icing situation with your plane under FS, differently from real life, you only have your plane struggle to keep speed and altitude and never risk the very probable loss of control of the real counterparts (unless you allow your plane to reach stall conditions... and even then, this is badly simulated in the greatest majority of planes, under FS).

The speediest way to get rid of the excess weight the wretched icing simulation of FS beleaguers us all with, in absence of anti-ice systems, is to lose altitude. FAST. If you use ActiveSky 6.5 or better, stay away from clouds even if outside temperatures do not seem low enough for ice (consider it a trap and treat it accordingly). If you're still flogging yourself raw with the inbuilt weather system... be very aware of your flight and when you start losing speed and struggling to stay afloat, take icing countermeasures.