Engines

Question 1

The engines use a ________ direct gear drive starter unit.

Answer 1

24-Volt DC

Question 2

Explain the starting sequence.

Answer 2

Fuel selector-on
Battery/Alternator-on
Mixture/Props- Full forward
Fuel pump-Hi
Throttle-full forward
When fuel flow stable-fuel pump off
Throttle-1/2
Starter-engage

Question 3

What does the manifold pressure gauge indicate?

Answer 3

Intake manifold pressure in inches of mercury (Hg)

Question 4

What does the engine tachometer indicate?

Answer 4

Engine and propeller RPM

Question 5

What does the exhaust gas temperature gauge indicate?

Answer 5

The EGT sensed by a probe installed in the exhaust manifold of each engine

Question 6

Is it fuel injected or carbureted?

Answer 6

Fuel injected

Question 7

What is the fuel injection pump driven off of?

Answer 7

The accessory drive of the engine

Question 8

What pressure is fuel introduced into the pump at?

Answer 8

28-31 psi

Question 9

After the fuel enters a vapor separator, what is the next part that it flows to?

Answer 9

The fuel divider block

Question 10

What is a fuel air control unit?

Answer 10

Controls the volume of intake manifold air and metered fuel pressure to the engine for proper combustion

Question 11

What does the fuel pass thru prior to entering the metering valve?

Answer 11

A strainer

Question 12

What does the metering valve control?

Answer 12

Fuel flow to the manifold and fuel injector distributor block

Question 13

How many injection nozzles are provided for EACH cylinder?

Answer 13

1

Question 14

What is the fuel injection nozzles attached to the cylinder?

Answer 14

The head, above the intake port

Question 15

How do you prime thru the injectors?

Answer 15

The auxiliary fuel pump

Question 16

What type of oil system is the Baron equipped with?

Answer 16

A wet sump, pressure-type oil system.

Question 17

What is a wet-sump oil system?

Answer 17

Oil pump draws oil directly from the sump, routes it to the engine, then after use of the oil in the engine, it will redistribute back to the sump

Question 18

What is the capacity of oil in the engines?

Answer 18

12 quarts

Question 19

What kind of oil pump is provided?

Answer 19

Gear-driven

Question 20

What is the oil pump powered by?

Answer 20

Accessory section

Question 21

What is provided in the oil system to relief high oil pressure in the lines?

Answer 21

Relief valves

Question 22

What is oil temperature controlled by?

Answer 22

An oil cooler

Question 23

How does the oil cooler work?

Answer 23

It uses a thermostatic bypass valve to route oil through or around the cooler

Question 24

What is the type of ignition system?

Answer 24

Dual ignition

Question 25

Each ignition system consists of ________

Answer 25

Magnetos, wiring harnesses, and a spark plug in each cylinder

Question 26

What is the type of propeller?

Answer 26

3-blade, full-feathering, constant speed props

Question 27

What is used to INCREASE blade pitch?

Answer 27

Springs aided by counterweights and/or dome pressure

Question 28

What DECREASES the blade pitch?

Answer 28

Governor-boosted engine oil

Question 29

If you lose dome pressure, what capability is lost?

Answer 29

Feathering

Question 30

What are signs of dome pressure loss?

Answer 30

Sluggish RPM reduction, over speed and poor synchronization during higher RPM operation

Question 31

What is the underspeed condition?

Answer 31

Ex: Pitching the aircraft up without changing power.

The crankshaft slows, flyweights slow, they fall inward, opening the pilot valve to allow for oil to go into the dome, which moves the blades to a lower pitch to allow it to catch back up with the desired RPM

Question 32

What is the overspeed condition?

Answer 32

Ex: Pitch down without reducing power.

Crankshaft speeds up, flyweights fall outward, lifting the pilot valve upward to make oil flow from the propeller dome, which in terms will increase the blade angles to higher pitch - making the RPM slow down to desired setting