Maybe that’s because the main ingredient of a forward slip is a cross-controlled airplane. Generally, we are taught to avoid cross-controlling an airplane. But in a forward slip, we cross-control, safely, for a very good reason: to steepen the airplane’s descent angle to clear an obstruction on final. That’s really helpful at short, obstructed runways. A forward slip can be an essential skill for engine-out, off-field landings.
Before practicing a forward slip, consult the pilot’s operating handbook. Some Cessna models prohibit or urge caution when performing a forward slip with full flaps. Warn passengers when you’re about to perform a slip. They’ll be alarmed if they don’t know you’re flying this way for a reason.
Airman certification standards
Task M. Forward Slip to a Landing
To determine that the applicant exhibits satisfactory knowledge, risk management, and skills associated with a forward slip to a landing.
The applicant demonstrates understanding of:
- Concepts of energy management during a forward slip approach.
- Effects of atmospheric conditions, including wind, on approach and landing performance.
- Wind correction techniques during forward slip approaches.
- When and why a forward slip approach is used.
The applicant demonstrates the ability to identify, assess and mitigate risks, encompassing:
- Selection of runway or approach path and touchdown area based on pilot capability, aircraft performance and limitations, available distance, and wind.
- Effects of:
b. Wind shear
d. Wake turbulence
e. Runway surface/condition
- Abnormal operations, to include planning for rejected landing and go-around.
- Collision hazards, to include aircraft, terrain, obstacles, and wires.
- Low altitude maneuvering/stall/spin.
- Distractions, loss of situational awareness, and/or improper task management.
- Forward slip operations, including fuel flowage, tail stalls with flaps, and lack of airspeed control.
The applicant demonstrates the ability to:
- Complete the appropriate checklist.
- Make radio calls as appropriate.
- Plan and follow a flightpath to the selected landing area considering altitude, wind, terrain, and obstructions.
- Select the most suitable touchdown point based on wind, landing surface, obstructions, and aircraft limitations.
- Position airplane on downwind leg, parallel to landing runway.
- Correctly configure the airplane.
- As necessary, correlate crosswind with direction of forward slip and transition to side slip for landing. Touch down within -0/+400 feet from the specified touchdown point with minimum side drift.