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Cirrus CSIP > Fuel > Flashcards

Fuel Flashcards

1
Q

What is the usable fuel and average range?

A

20: 56 gal - 650NM
22/22T: 92 gal - 850NM

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2
Q

What is fuel to tabs in the 20 and 22?

A

20: 13 gal usable
22/22T: 30 gal usable

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3
Q

How does fuel travel from the wing tanks to the engine? Draw and label. (11)

A

Main Tank
Flapper Valve
Collector Tank
Fuel Selector
AUX Fuel Pump
Gascolator (Filter)
Engine Driven Fuel Pump
Throttle Metering Valve (22s)/Fuel Servo (20s)
Flow Divider (Spider)
Fuel Injectors
Cylinders

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4
Q

Why are the collector tank important? (2)

A
  • Impacted less by flight maneuvers/Lateral accelerations
  • Provide immediate on-demand source of fuel
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5
Q

What is the MAX Fuel Imbalance?

A

20: 7.5 gal
22/22T: 10 gal

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6
Q

Especially in the Turbos, why do we leave the Fuel Pump ON for at least 30 minutes after Takeoff?

A

To let the bulk fuel temp DECREASE with altitude, and avoid Fuel Vaporization/Vapor Lock

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7
Q

On descent in the Turbos, what is proper fuel pump technique?

A

Follow the checklist.

Do not got from High Boost/Prime directly to OFF, or vice versa.

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8
Q

Boost Pumps:

A

20s:
ON - fuel priming for engine start, or vapor suppression

OFF

22s:
BOOST - Low-Speed fuel pressure, and vapor suppression

PRIME - High-Speed fuel pressure for priming (protected by a GEA fuel relay reading engine oil psi < 10 to complete the appropriate circuit)

OFF

22Ts:
BOOST - Low-Speed fuel pressure, and vapor suppression

HIGH BOOST/PRIME - High-Speed fuel pressure for priming, and vapor suppression at high altitudes (protections built in to GEA to control Low or High-Speed circuit)

OFF

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9
Q

How is the Engine Driven Fuel Pump in the 22T different than the EDFP in the normally aspirated SR22/20?

A

22T EDFP is Pressure (Altitude) Compensating, the 20/22s are standard.

Pressure Compensating = dynamically varies Outlet FUEL Pressure, based off changes in the Turbocharged Manifold Pressure.

  • As boosted air increased or decreases (28.5 “Hg - 30.5 “Hg), so does fuel flow.
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10
Q

Mixture

What does it control?
What is it integrated with, within the fuel system?

A

RATIO
Fuel : Air

20s: Fuel Servo
22/22T: Engine Driven Fuel Pump

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11
Q

Power Lever controls:

A

TOTAL VOLUME
Fuel/Air Mixture

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12
Q

What happens to excess fuel (fuel not needed for combustion)?

A

Returns to the selected Wing Tank. by way of the Fuel Selector

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13
Q

When does the FUEL IMBALANCE Advisory illuminate?

A

Within 2 gal of the aircraft’s imbalance limitation.

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14
Q

What are the 5 Fuel Pump ON conditions?

A

Takeoff, climb, landing, switching tanks, maneuvers.

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15
Q

What is Peak EGT

A

14.7 : 1
EGTs reach their highest temperature.

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16
Q

What is ROP

A

Best Power
Extra fuel keep cylinders cool.
More power, more fuel burn.

17
Q

What is LOP

A

Best Economy
Extra air keeps cylinders cool.
Less power, less fuel burn.

18
Q

In the 22T all cruise operations are conducted with the mixture/EGTs in ____

A

LOP because it can achieve high power settings LOP where Normally Aspirated engines cannot

19
Q

Operating LOP has been stabilized in GA because of:

A

TUNED fuel injectors.

20
Q

Rule of thumb for leaning and CHT temps:

A

0.5 gph fuel reduction = 15 deg Celsius temp reduction

21
Q

22T / 22TN cruise settings

A
  • All charts are based on LOP ops

Cruise leaning in the 22T is only approved when Man “Hg is 30.5 or less!!! must bring Power Lever back first. Then, the blue target indicator appears on fuel flow arc (advisory only). Now, you can bring the Mixture control back.

22TN has 2 options, Max cruise power and Economy cruise power.

22
Q

Hot Start Procedures:

A

> 100 deg F Oil Temp
Mixture Rich (no prime)
Throttle 1/4”
Fuel Pump to Prime/Boost
Start Normally

< 100 deg F Oil Temp
Fuel Pump to Prime/High Boost until you see FF just begin to register
Listen for the pump to slow/bog down, then select BOOST
Throttle 1/4”
Start Normally

23
Q

ROP 22T Checklist/Procedure

A
  1. Oxygen…AS REQUIRED
  2. Power Lever…..FULL FORWARD
  3. Mixture ….MAINTAIN FUEL FLOW IN GREEN ARC
  4. Flaps …..VERIFY UP
  5. Airspeed….120 KIAS
  6. Fuel Pump ….BOOST
  7. Fuel Flow …..MONITOR
  8. Engine Parameters …..MONITOR
24
Q

LOP 22T Checklist/Procedure

A
  1. Power Lever …..REDUCE TO 30.5 IN.HG
  2. Mixture…..LEAN TO CYAN TARGET OR LESS
  3. Minimum Airspeed ….120 KIAS
  4. Fuel Pump….BOOST
  5. Oxygen (if available)…..AS REQUIRED
    a. Oxygen Masks/Cannulas …..DON
    b. Oxygen System…..ON
    c. Flow Rate ….ADJUST FOR PLANNED CRUISE ALTITUDE
    d. Flowmeters and Quantity…MONITOR
  6. Cylinder Head Temperatures….MONITOR

Cirrus CSIP (11 decks)

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