Dash 1 Info

Question 1

Engine Energy measured by what?

Answer 1

1) FF and TiT

2) Because RPM remains constant at 100%

Question 2

Power Section of Engine Contains what

Answer 2

1) 14 Stage Axial Flow compressor
2) 6 combustion chambers
3) Four stage Turbine

4) Acceleration Bleed Valves
5) Anti- Icing systems

6) Compressed Air moves through at 125 PSI and 600 deg F

7)

Question 3

Whats mounted on Power/Compressor Section

Answer 3

1) Accessories Drive Assembly
2) Components of engine Fuel
3) Ignition
4) Control System.

5) Acceleration bleed valves are on 5th and 10th compressor stages.

Question 4

Extension Shaft Assembly

Answer 4

1) Two Concentric Shafts
2) The inner - takes power from power section to reduction gear.

3) The outer - serves as a reference for the torque of the inner shaft.

Question 5

Reduction Gear Assembly

Answer 5

1) Reduction Gear Train
2) Prop Brake
3) NTS
4) Safety Coupling

Also

1) Starter,
2) AC Generator
3) hydraulic pump oil pump and tach generator

Question 6

Prop Brake

Answer 6

1) First stage of reduction gearing.
2) Held disengaged by gearbox oil pressure.
3) When RPM exceeds 23 percent it is engaged.

4) Engages to stop reverse rotation of the prop

Question 7

Safety Coupling

Answer 7

1) Decouple the power section form reduction gear if Negative Torque is applied.
2) Active when -6000 inch ponds of torque are detected.
3) backs up the NTS to reduce drag until the engine is feathered,

Question 8

NTS

Answer 8

1) Provides mechanical signal to limit negative torque.
2) NEgative torque happens when the prop attempts to drive the engine.
3) Noticed by great Yaw of the plane.
4) operates at -1260 +/- 600 inch pounds.

Question 9

What are the 3 major power plant components?

Answer 9

1) Turbojet Engine
2) Reduction Gearbox
3) Propeller

Question 10

The Primary Function of the Power plant is to do what?

Answer 10

1) Convert Combustion Gas energy to mechanical shaft horsepower which is transmitted to the reduction gearbox through the extension shaft.
2) It’s read in inch pounds on the torque meter.

Question 11

The Units on the Engine Driven Accessory Drive Are what?

Answer 11

THING => OFFSS

1) Oil Pump
2) Fuel Pumps
3) Fuel Control
4) Speed Sensitive Control (electrical)
5) Speed Sensitive Valve (pnuematic).

Question 12

The reduction Gearbox - Does what?

Answer 12

1) Converts the High Rpm and low torque output of the engine into a LOW RPM and HIGH TORQUE output at the prop.
- Low prop RPM is necessary to assure efficient propeller ops.

2) Reduction Ratio is 13.54:1
3) Engine rotating at 13,820 rpm
4) Props are at 1,021 RPM

Question 13

The Reduction Gear box Accessories are what?

Answer 13

THINK => GHOST

1) Generator (AC)
2) Hydraulic Pump
3) Oil Pump
4) Starter
5) Tachometer Generator

Question 14

Power Plant Instruments do what?

Answer 14

1) Torquemeter indicates torque in thousands of inch-pounds being transmitted from the engine turbine section to the reduction gear assembly
2) Tachomeer indicates % RPM of the propeller and reduction gear assembly
3) Turbine inlet temperature in degrees C, temperature of the gases entering the first turbine stage
4) Fuel Flow indicates fuel actually entering the fuel manifold after all fuel corrections have been made.

Question 15

Throttles have 2 distinct and separate operation ranges which are what?

Answer 15

1) Taxi range is full reverse to the forward taxi limit (Flight Idle gate which is 0 - 34 degrees).
2) IN this range, throttles control FF and blade angle.
3) Flight range is flight idle to maximum power (34 - 90 degrees). Throttles schedule fuel flow Only in this range.