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(913) 702-4570

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Lesson 8: MANEUVERING AT MINIMUM CONTROLLABLE AIRSPEED (SLOW FLIGHT)

MANEUVERING AT MINIMUM CONTROLLABLE AIRSPEED:

This maneuver demonstrates the flight characteristics and the amount of controllability that any particular
aircraft will have at its minimum flying speed. Please take note - do not expect all aircraft of the same class (all C-
152’s, or all C-172’s, etc.) to be just alike they will differ from individual airplane to airplane. This is one of the
maneuvers that is excellent for “getting the feel of the airplane”, and will approximate the configuration and
condition that you will be in during the round out and landing portion of a soft field landing.

Objective:
To recognize changes in the aircraft flight characteristics at critically slow airspeeds in various attitudes
and configurations.

Content:
Establishing Minimum Controllable Airspeed
1. Select an altitude no lower than 1500 AGL
2. Perform clearing turns
3. Power change
a. Fuel - On
b. Mixture - Rich
c. Carburetor heat on
d. Reduce Power

C-152 1500 rpm
C-172 1500 rpm
C-172RG 15 In Hg

e. Oil Pressure - in green
f. Trim
4. Maintain 0 rate of sink on VSI
5. Allow airspeed to decrease to 5Kts above stall
6. Trim for stable flight
7. Set power as appropriate to maintain altitude
8. Lower flaps to 10°
9. Trim for stable flight
10. Adjust power as appropriate to maintain altitude
11. Lower flaps to 20°
12. Trim for stable flight
13. Adjust power as appropriate to maintain altitude
14. Lower flaps to 30°
15. Trim for stable flight

Maneuvering At Minimum Controllable Airspeed
1. Perform left/right turn 90°
2. Perform climb as directed
3. Perform descent/level off as directed

Recovery
1. Raise flaps to 20°
2. Adjust power as appropriate to maintain altitude
3. Trim for stable flight
4. Reduce power 100 RPM

C-152 100 rpm
C-172 100 rpm
C-172RG 1 In Hg

5. Raise flaps to 10°
6. Trim for stable flight
7. Increase power

C-152 100 rpm
C-172 100 rpm
C-172RG 1 In Hg

8. Raise flaps to 0°
9. Trim for stable flight
10. Apply cruise power smoothly
a. Fuel - On
b. Mixture - Rich
c. Carburetor heat on
d. Increase Power

C-152 2300 rpm
C-172 2300 rpm
C-172RG 23 In Hg

e. Oil Pressure - in green
f. Trim
11. Lower nose to maintain altitude
12. Trim for stable flight

Completion Standards:
1. Maintain specified bank within 10°
2. Maintain altitude within 100 feet
3. Maintain heading within 10°
4. Maintain airspeed + 10 Kts - 0 Kts of stall speed

Common Errors:
1. Poor altitude control during transition
2. Heading problems during straight and level and climbs.
3. Stalling the aircraft
4. Excessive changes in airspeed during transition
5. Failure to maintain constant surveillance of area