![]() ![]() To get the best power, and therefore the right mixture (in cruise phase), you can proceed this way: a rich mixture leads to high consumption and clogging of the engine. a lean mixture favors the overheating of the engine and the appearance of detonation phenomena, The mixture command is used to adjust the amount of gasoline in the air-fuel mixture to ensure proper combustion. However, if you are on a mountain airfield (or in very warm areas), the mixture setting should not be full rich, refer to the flight manual. During the cruise, above a certain altitude (see your flight manual), usually 4000ft, the reduction of the mixture is recommended. The best way to maintain the proper fuel-air mixture is to monitor the exhaust gas temperature (EGT), or engine RPM indicator. This fuel ratio is calculated so that the air-fuel mixture gives the engine maximum power. The air-fuel mixture is produced by the venture effect upstream of the carburetor throttle valve.įloat-type carburetor - FAA Pilot's Handbook of Aeronautical Knowledgeĭuring the take-off, climb, landing and go-around phases, the mixture control should be set to full rich. The mixture needle is adjusted by the mixture control. The difference between these two types is the way the gasoline is distributed.Īs shown in the diagram below, the mixture needle controls the amount of fuel going to the discharge nozzle. Pressure carburetors are not generally found on general aviation aircraft. There are two categories of carburetors: float-type carburetors and pressure-type carburetors. Since the process of adjusting the mixture can vary from one aircraft to another, it is important to refer to the airplane flight manual. The chemically perfect mixture corresponds to about 1 gram of gasoline for 15 grams of air (i.e. The correction of the mixture is done via the mixture control (rich or lean). This is why it is important to correct the air fuel mixture during all phases of flight take-off, climb, cruise, descent, landing and go-around. Poor management of the mixture can lead to certain problems and malfunctions. As the aircraft climbs in altitude, the density of the air in the carburetor decreases, but without adjustment of the mixture the amount of fuel remains the same. The carburetor is calibrated to atmospheric pressure at sea level with mixture control set in the full rich position. ![]() blue for variable-pitch propeller control (if this command is present).yellow or grey for carburetor heat control,.The various controls used to operate the engine are color coded: However, the use of the mixture control is identical for the two types of propellers. Another chapter will deal with these different systems. The driving of the engine is not the same if it is fixed-pitch propeller or variable-pitch propeller. The engine monitoring is done by two means: a command that we operate, and a driving parameter that is checked. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |