carburetor icing


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carburetor icing

[′kär·bə‚red·ər ‚ī·siŋ]
(mechanical engineering)
The formation of ice in an engine carburetor as a consequence of expansive cooling and evaporation of gasoline.

carburetor icing

carburetor icingclick for a larger image
The most common form of engine icing, which is caused by a sudden drop in temperature resulting from vaporization of the fuel and adiabatic cooling following the pressure reduction as the air accelerates through the venturi of the carburetor. The ice gradually builds up and blocks the venturi, upsetting the fuel-air mixture and resulting in a loss of power.
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We'll review carburetor icing, structural icing and ground icing.
The alerts include Engine Power Loss Due to Carburetor Icing and Proper Use of Fiber or Nylon Self-Locking Nuts.
Experts from the Air Accidents Investigation Branch (AAIB) said the loss of engine power was probably due to carburetor icing.
Only after we had dropped to 5,000 feet did we recognize carburetor icing, something we never had to worry about in Florida.
ACCIDENT SUMMARY ENGINE/MECHANICAL (28%) R-LOC (20%) OTHER (16%) STALL RELATED (9%) FUEL MISMANAGEMENT (9%) CFIT (7%) VFR INTO IMC (7%) FUEL CONTAMINATION (2%) STRUCTURAL ICING (2%) CARBURETOR ICING (0%) MID-AIR (0%) Note: Table made from bar graph.
Now an official Air Accident Investigation Branch report into the incident has concluded that the aircraft suffered an in flight engine failure, probably as a result of carburetor icing.
Carburetor icing depends on the outside temperature and on the humidity in the air.
The newest series of alerts targets shoulder harnesses, carburetor icing, ELTs, unsecured items in the cockpit, and fiber self-locking nuts.
The FAA carburetor icing probability chart indicated the airplane was operating in an area associated with a serious risk of carburetor ice formation at glide power settings.
Carburetor icing should be a topic familiar to most pilots, but induction system icing can be an afterthought.