Austro Engine Flashcards
What is the compression ratio of the engine
15:1
What is the compression ratio of a gasoline engine on average
9:1
Does the engine rotate at the same speed as the prop
No, prop at 2300, engine at 3900. So ratio of 1:1.69
Engine rotates 69% faster than the prop.
Name of engine
Austro E4-B
How many HP at 100%
165 HP
How many HP at 92%
153 HP
What is the max continuous power
92%
How soon one must start the engine if shut down
Above 10k: immediately
Below 10K: 2 minutes
Can we use windmilling to restart the engine
No
Max time to run the starter
10 sec
How much time between each attempts
20 s
If multiple attempts
If more than 6 attempts, wait 30 minutes
How much oil in engine max and mini
Max 7 liters.
Min 5 liters
What is the max oil consumption
.1 l per hour
When looking at the right engine while in front of the plane, where is:
- The air intake
-The turbo cooler
-The radiator
-The cabin heat /defrost
Air intake and turbo cooler at 2 o’clock
Radiator at 6
Cabin heat/defrost at 8 o’clock
Looking at the engine from behind, what is the large main outflow for
Turbo intercooler
Where is the heater outflow
At 2 o’clock (looking from behind).
When do we use the alternate air?
Visible moisture, rain, icing.
What kind of engine fire detection do we have?
Thermo couple near the turbo charger.
What would that thermocouple trigger
Aural alarm if temp above 250 degrees celsius
Can we test that thermocouple
Yes with the gear/fire test button
Can one check the coolant system before preflight
No
Can one know the temp of the coolant
MFD
What happens if coolant temp above 150 degrees celsius
Pressure relief valve vents coolant out bottom engine nacelle
What can you do in hot temperatures
Reduce engine power during climb
How many ECU are there
2 per side
What does the ECU control or monitor (8items)
Manifold pressure
Prop rpm
Turbo charger waste gate
Power lever position
Crankshaft/ camshaft position
Fuel injection timing
Fuel pressure
Glow plugs
What are the various positions of the ECU switches
Auto, A and B
In AUTO, which one is used
The one with the lowest time in use
What are the ECUs backup batteries
Per side: 2 x 12V at 13.6 amp hour (=1 24V battery). So 4 batteries total.
How long can they power the ECUs
30 minutes
What else are those batteries for
Alternator field current
On ground, one sees L/R ECU A/B FAIL, what do you do?
If after the test, terminate the flight preparations
What happens when the engine master switches are on
Releases gearbox oil from propeller’s unfeathering accumulator to prop hub.
What micro switches in power levers
2:
-Gear unsafe if power under 25%
-Power over 20% to activate the variable elevator back stop.
