Altitude Compensation - Fuel Mixture

[William Batten]

I'm new to this forum and new to Viking Engines. I'm early in my research.

 

My question is: Does a Viking 130 engine reduce the fuel rate automatically through the ECU as altitude increases - to lean out the mixture?

 

If so, is there an altitude limit - where no further leaning is conducted?

 

Thanks to all,

 

Bill

[Viking Aircraft Engines]

Yes, it does that and there is no altitude limit for this

[William Batten]

Thanks! I have another newbie question. Since the Viking engine is built to automotive tolerances regarding piston to cylinder clearance - is preheating required in cold weather?

[Viking Aircraft Engines]

Only if you would like to do so. The engine will start and warm up on its own.

[William Batten]

Thanks. How about the Turbo 195 - does it lean with altitude like the 130?

Bill

[Viking Aircraft Engines]

The modern engines do not care what altitude they are at. The engines do not “know” what altitude they are at. They do not need this information.

The engine “Know” what the temperature and manifold pressure is. From this, the correct amount of fuel can be calculated.

So, yes, any temperature/ any altitude