Aircraft and Engine operations Flashcards
4 main control surfaces & functions?
elevators: lateral axis / pitch
ailerons: longitudinal axis / roll
rudder: vertical axis / yaw
trim tabs: adjustable hinged surfaces for any of the 3 other control surfaces (depending on the plane) that are labor saving devices so you can release the manual pressure on the controls
What are flaps & their function?
movable panels on the inbaord trailing edges of the wings. The extend downward to increase lift and drag. Permit slower speed and steeper angle of descent. Can also shorten takeoff distances.
What type of engine does your plane have?
MFG: Lycoming O235-L2C
110 BHP @ 2550 RPM
Normally aspirated, air cooled, horizontally opposed, carburetor equipped, 4-cylinder
What are the four strokes?
intake = fuel air mixture enters cylinder compression = mixture compressed power = fuel air mixture ignites exhaust = burned gasses are purged
suck, squeeze, bang, blow
What does a carburetor do?
mixes the fuel and air in the correct proportions. Vaporizes liquid fuel and mixes it with air. Measures the airflow and meters fuel accordinly.
Carburetor heat changes what about the f/a mixture?
heated air will result in a richer mixture because there will be less air vs same fuel
What does the throttle do?
Manuall controls the fuel / air mixture enterting the cylinders. regulars power and to a lesser extent, speed
What does the mixture control do?
regulates fuel to air mixture. prevent mixture from becomming too rich at higher altitudes due to decreasing air density. Lean the mixture during XC flights for optimum power
Describe the ignition system
two engine driven magnetos and two spark plugs per cylinder. Independent of aircraft’s electrical system. magnetos are engine driven, self-contained units sypplying electrical current without using an external source of current. A battery powers the a stare that turns the crankshaft and kicks the magneto on to produce the sparks in the cylinder.
Advantages to dual ignition system
increeased safety: redundacy
more complete and even combustion of mixture and better performance
What type of fuel system?
Gravity fed. Fuel flows from wing tanks to a shutoff valve which allows it to flow through a strainer to the carb. The nfuel is mixed with air and flows into the cylinders.
Purpose of fuel tank vents?
As the fuel level decreases a vacuum would be created without venting and that would result in decreased fuel flow and possible engine stoppage.
Describe the electrical system?
28 volt, direct current, powered by enginen driven 60 amp alternator and 24 volt battery
How are the circuits for electrical accessories protected?
circuit breakers or fuses or both
Electrical system provides power for what?
a. radio
b. turn coordinator
c. fuel gauges
d. pitot heat
e. lights
f. flaps
l. oil temp gauge
