Aero Engines : Aero Engines 409.03 - Carburetor, Mixture, and Icing.
Carburetors : Carburetors
Parts of the Carburetor : Parts of the Carburetor
Carburetors : 4 Carburetors (1) Vaporize the Fuel
(2) Mix Fuel and Air Carburetor is the heart of an engine. The two key functions of the carburetor are:
Carburetor Mixture Ratios : 5 Carburetor Mixture Ratios Fuel-Air mixture
Running mixture
1:8
Best power mixture
1:14
Chemically correct mixture
1:15
Lowest fuel consumption mixture
1:18
Leanest running mixture
1:20
Mixture Controls : 6 Mixture Controls
Carburetion vs Fuel Injection : 7 Carburetion vs Fuel Injection Advantages:
More uniform distribution of fuel to all cylinders
Better cooling
Better efficiency
No carburetor
No carburetor icing
no need to heat intake air; therefore, more power
An alternate air source is required
Parts of Fuel Injection system : 8 Parts of Fuel Injection system
Fuel Injection Engines : 9 Fuel Boost Pump
Fuel Control Unit
Fuel Manifold Valve
Fuel Discharge Nozzle Pressurized Fuel Fuel Injection Engines
Carburetor Icing : Carburetor Icing
Carburetor Ice : 11 Carburetor Ice Ice can form in the carburetor and will restrict air flow to the engine, resulting in:
Loss of Power
Rough Running Engine
Total Engine Failure
Ice can READILY form in the carburetor in CLEAR AIR with ambient air temperatures from -5 to +30 degrees Celsius, depending on the humidity of the air
Slide 12 : 12 Dangerous Conditions
Slide 13 : 13 Dangerous Conditions
Use of Carb-heat and its Effects on Mixture : 14 Use of Carb-heat and its Effects on Mixture
Review Exercise : Review Exercise