Austro Engine

Question 1

What is the compression ratio of the engine

Answer 1

15:1

Question 2

What is the compression ratio of a gasoline engine on average

Answer 2

9:1

Question 3

Does the engine rotate at the same speed as the prop

Answer 3

No, prop at 2300, engine at 3900. So ratio of 1:1.69
Engine rotates 69% faster than the prop.

Question 4

Name of engine

Answer 4

Austro E4-B

Question 5

How many HP at 100%

Answer 5

165 HP

Question 6

How many HP at 92%

Answer 6

153 HP

Question 7

What is the max continuous power

Answer 7

92%

Question 8

How soon one must start the engine if shut down

Answer 8

Above 10k: immediately
Below 10K: 2 minutes

Question 9

Can we use windmilling to restart the engine

Answer 9

No

Question 10

Max time to run the starter

Answer 10

10 sec

Question 11

How much time between each attempts

Answer 11

20 s

Question 12

If multiple attempts

Answer 12

If more than 6 attempts, wait 30 minutes

Question 13

How much oil in engine max and mini

Answer 13

Max 7 liters.
Min 5 liters

Question 14

What is the max oil consumption

Answer 14

.1 l per hour

Question 15

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

Answer 15

Air intake and turbo cooler at 2 o’clock
Radiator at 6
Cabin heat/defrost at 8 o’clock

Question 16

Looking at the engine from behind, what is the large main outflow for

Answer 16

Turbo intercooler

Question 17

Where is the heater outflow

Answer 17

At 2 o’clock (looking from behind).

Question 18

When do we use the alternate air?

Answer 18

Visible moisture, rain, icing.

Question 19

What kind of engine fire detection do we have?

Answer 19

Thermo couple near the turbo charger.

Question 20

What would that thermocouple trigger

Answer 20

Aural alarm if temp above 250 degrees celsius

Question 21

Can we test that thermocouple

Answer 21

Yes with the gear/fire test button

Question 22

Can one check the coolant system before preflight

Answer 22

No

Question 23

Can one know the temp of the coolant

Answer 23

MFD

Question 24

What happens if coolant temp above 150 degrees celsius

Answer 24

Pressure relief valve vents coolant out bottom engine nacelle

Question 25

What can you do in hot temperatures

Answer 25

Reduce engine power during climb

Question 26

How many ECU are there

Answer 26

2 per side

Question 27

What does the ECU control or monitor (8items)

Answer 27

Manifold pressure
Prop rpm
Turbo charger waste gate
Power lever position
Crankshaft/ camshaft position
Fuel injection timing
Fuel pressure
Glow plugs

Question 28

What are the various positions of the ECU switches

Answer 28

Auto, A and B

Question 29

In AUTO, which one is used

Answer 29

The one with the lowest time in use

Question 30

What are the ECUs backup batteries

Answer 30

Per side: 2 x 12V at 13.6 amp hour (=1 24V battery). So 4 batteries total.

Question 31

How long can they power the ECUs

Answer 31

30 minutes

Question 32

What else are those batteries for

Answer 32

Alternator field current

Question 33

On ground, one sees L/R ECU A/B FAIL, what do you do?

Answer 33

If after the test, terminate the flight preparations

Question 34

What happens when the engine master switches are on

Answer 34

Releases gearbox oil from propeller’s unfeathering accumulator to prop hub.

Question 35

What micro switches in power levers

Answer 35

2:
-Gear unsafe if power under 25%
-Power over 20% to activate the variable elevator back stop.