Engines

Question 1

What engine is fitted to the 737-800?

Answer 1

CFM56-7B26

Question 2

What type of engine is the CFM56-7B26?

Answer 2

Twin spool, axial flow turbofan engine

Question 3

Diameter of the fan

Answer 3

1.55m

Question 4

Bare engine weight

Answer 4

2.3 tonne

Question 5

How is the N1 & N2 connected?

Answer 5

They are not mechanically linked

Question 6

Maximum N1 operating limit

Answer 6

104%

Question 7

Maximum N2 operating limit

Answer 7

105%

Question 8

Overspeed governor limits

Answer 8

N2 106% (+/- 2%)

Question 9

Which is high pressure and low pressure N1/N2?

Answer 9

N1 = Low pressure
N2 = High pressure

Question 10

N1 & N2 compressor and turbine stages?

Answer 10

N1 compressor = 4 stages (including 1 stage fan)
N2 compressor = 9 stages
N2 turbine = 1 stage
N1 turbine = 4 stages

Question 11

How many fan blades does the CFM56-7B26 have?

Answer 11

24 wide chord titanium blades

Question 12

How much extra thrust does the fan provide on take-off?

Answer 12

80% extra thrust

Question 13

What drives the accessory gearbox?

Answer 13

N2 Turbine

Question 14

Where is bleed air tapped from?

Answer 14

5th stage of the N2 compressor but 9th stage at low power settings

Question 15

What are the primary engine indications?

Answer 15

N1 & EGT