Cessna 421C

Question 1

what is VYSE

Answer 1

Blue line: 111 KIAS

Question 2

What is VSO

Answer 2

77 KIAS

Question 3

What is VS1

Answer 3

86 KIAS

Question 4

What is MVC without/ with VGs

Answer 4

80 / 73 KIAS

Question 5

What is VLO/ VLE

Answer 5

176 KIAS

Question 6

What is VFE 15

Answer 6

176 KIAS

Question 7

What is VFE 15-15

Answer 7

143 KIAS

Question 8

What is VNO

Answer 8

201 KIAS

Question 9

What is VNE

Answer 9

240 KIAS

Question 10

What is the max demonstrated cross wind

Answer 10

17

Question 11

What is normal approach speed

Answer 11

86-100 KIAS short final

Question 12

What are the power settings (MP, RPM, Mixture, Fuel pump) for Take off?

Answer 12

MP: 39.0”
RPM: 2235
Mixture: Low

Question 13

What are the power settings (MP, RPM, Mixture, Fuel pump) for NORMAL CRUISE CLIMB

Answer 13

MP: Per cruise Chart

RPM: 1600-18000

Mixture: For > 65% power: Lean to peak EGT then 75* ROP
LEAN FOR POWER CHANGES, NOT ALTITUDE

Fuel Pump: LOW only to purge fuel vapor

Question 14

What are the power settings (MP, RPM, Mixture, Fuel pump) for ECONOMY CRUISE CLIMB

Answer 14

MP: Per cruise Chart

RPM: 1600-18000

Mixture: For < 65% power: Lean to peak EGT.
Lean of Peak “LOP” ops permitted with matched
injectors and engine monitoring system.
LEAN FOR POWER CHANGES, NOT ALTITUDE

Fuel Pump: LOW only to purge fuel vapor

Question 15

What are the power settings (MP, RPM, Mixture, Fuel pump) for DESCENT?

Answer 15

Maintain cruise mixture setting during descent
unless engine roughness experienced.
DON’T GO FULL RICH AT LOW POWER

CRUISE SETTINGS:
MP: Per cruise Chart

RPM: 1600-18000

Mixture: For > 65% power: Lean to peak EGT then 75* ROP
LEAN FOR POWER CHANGES, NOT ALTITUDE

Fuel Pump: LOW only to purge fuel vapor

Question 16

What are the power settings (MP, RPM, Mixture, Fuel pump) for DESCENT?

Answer 16

MP: 20- 25”

RPM: 1950 - 2235

Mixture: REMAIN LEANED

Fuel Pump: LOW

Question 17

What are the power settings (MP, RPM, Mixture, Fuel pump) for GO AROUND?

Answer 17

MIXTURE ==> PROP ==> THROTTLE

MIXTURE: FULL RICH
PROP: FULL FORWARD
THROTTLE: 39.0”
FUEL PUMP: LOW

Question 18

What engine is on on the 421C

Answer 18

Continental GTSIO-520

Question 19

What is the turbo “critical altitude” on the Cessna 421’s Continental GTSIO-520?

Answer 19

20K feet is the Critical Altitude for the

turbocharger waste gate where it is fully closed by this altitude and above

Question 20

What do the letters in GTSIO-520 stand for?

Answer 20

GTSIO-520 stands for “Geared Turbo-Supercharged Injected Opposed 520 cubic inch”.

Question 21

What is the gear ratio in the Cessna 421’s GTSIO-520?

Answer 21

The gear reduction box mounted on the front of the block has a 1.5:1 ratio which causes the prop to
spin slower than the engine crankshaft.

Question 22

At full power, how fast are the props spinning

Answer 22

When at full RPM, the prop spins at 2235 RPM (C model only vs 2275 forA&B) while the engine is at almost 3400 RPM (3500 for A&B).

Question 23

How much oil does the GTSIO-520 have?

Answer 23

Continental 520s hold 12-13 quarts in the sump and 1 quart in the filter. 9 quarts is the minimum for
operation. Per the POH, fill to 10 quarts for up-to 3 hour flights and FULL for longer flights.

Question 24

What is the most common oil used in the GTSIO-520?

Answer 24

20W50 is a common multi-viscosity oil for these engines