Promoting the safe enjoyment of aviation for pilots, aircraft builders and enthusiasts.
While flying at 5000 feet, the author experienced engine roughness and sputtering, prompting an emergency descent. After investigating potential causes, he discovered severe lead fouling in the spark plugs, attributed to changes in flying habits and the use of 100 low-lead fuel. He replaced the plugs, cleaned others, and improved engine performance by flying at higher RPMs.
Carburetor ice can form even at higher ambient temperatures, potentially as warm as 100°F (38°C), due to significant temperature drops in the carburetor throat. However, it is most common when temperatures are under 70°F (21°C) and humidity exceeds 80%. Regular checks of carburetor heat are crucial for engine operation.
Aircraft operation is significantly endangered by carburetor icing, which is often unnoticeable to pilots until power loss occurs. Conditions for icing commonly arise at temperatures between 20°F and 65°F with high humidity. Preventive measures include maintaining appropriate air temperatures and monitoring humidity to mitigate the risk of icing effectively during flights.
The past month featured enjoyable weather and a successful Annual CUFC Banquet and Auction, raising $850 for the COPA Emergency Action Fund. The author shared insights on carburetor ice, detailing its three types: fuel vaporization, impact, and throttle ice, highlighting the importance of carburetor heat to mitigate these issues.
The Cessna 150 project is complete after a year of upgrades, including avionics, a new engine, and a conversion to key-start. The installation went smoothly, with improved performance and no leaks observed post-swap. However, the plane unexpectedly gained 35 lbs, complicating future flight training arrangements within legal weight limits.
Calgary Recreational Flying Club YYC 