Chapter2 Flashcards
(21 cards)
List 3 characteristics of Horizontally opposed engines
Air cooled 4 stroke engine
Even number of cylinders
Small frontal area
Low parasite drag
What stroke engine ultra light uses
2 stroke
List 4 characteristics of radial engine
Big surface are
More parasite drag
Odd no cylinders
Expensive maintenance
4 stroke name
Intake
,compression
Power
Exhaust
How Are most certified piston powered aircraft cooled
Air cooled
Name some planes that are liquid cooled
Mustang, katana p51
P lead is related to
Grounding of magnetos
If p lead is Broken the engine will continue to run it means
Mags are still alive not grounded when shut down
What is another cause for little or no RPM drop
Magneto timing
Apart from taking pollution out the exhaust system also does what
Reduces noise
Leaks in exhaust system could cause
Carbon monoxide poisoning
What are ancillary controls
Mixture control n carburetor heat control
What is chemical correct mixture ratio
1:15
 What is the best power ratio
1:14
Leaning the mixture can also cause
Decrease the chance of spark plug fouling and decrease preignition
What does turbo charger and super charge do
Increase the altitude at which full power can be maintained
Where does turbo charger gets its power from
Gets its power from the exhaust which turns the power turbine
Give me an advantage and disadvantage of turbo charger
Advantage is it’s very lightweight and does not take power directly from the engine. This is for advantage it’s it’s very hot operating it’s very expensive and it’s very high maintenance.
It works by compressing the air
What does the Wastegate do
Regulates the amount of exhaust gas directed to turbine. When the west gate is open the engine is not turbo charged when the gate is closed the engine is turbo charged
How does supercharger works As compared to turbo charger
Supercharger is internally driven compressor power directly by the engine or by the crankshaft the advantage is it’s reliable and less expensive
Disadvantage is it takes power from the engine up to 16%
High density =
High density = low air density, high temperature, high humidity, high altitude.
Low density altitude =high air density, low temperature, low humidity, low altitude
