Airplane Level Turns
| Objective: |
To teach the student to detect small deviations from straight-and-level flight as soon as they occur, necessitating only small corrections. |
| Content: |
Before Flight:
- Review general aircraft operation and speeds
- Review aerodynamics for level turns
- Aileron actions
- Adverse yaw
- Use of rudder
- Once established in medium turn, rudder is no longer needed (no adverse yaw because ailerons are neutral)
- Terms:
- Shallow turns – lateral stability attempts to return wings level ( < 20?(
- Extra lift developed by outside wing moving faster is not enough to overcome inherent lateral stability
- Medium turns – airplane remains at constant bank (20? – 45?)
- Increased lift developed by outside wing moving faster balances aircraft’s inherent lateral stability
- Steep turns – airplane tends to overbank (> 45?)
- Increased lift developed by outside wing overpowers inherent lateral stability and causes tendency to increase bank angle
- As a result of increase lift, increased induced drag causes wing to lag slightly, inducing a slight slip in steep turns
- Parallax error in turns in aircraft with side-by-side seats
- Left turns make nose appear to rise
- Right turns make nose appear to descend
- Roll out of turns ½ bank angle before desired heading
During Flight:
- Instructor begins lesson with medium turns to reduce interfering factors such as lateral stability and overbanking tendency
- Instructor ensures student has a light grip on controls and makes small corrections
- Instructor ensures student maintains coordination in turns
|
| |
- Students should focus outside, but crosscheck situation with instruments occasionally
- Check, correct, recheck
- Instructor ensures student retains an upright posture during turns
- During steep turns, instructor ensures student corrects altitude loss by first lessening bank angle’
See AFH C. 3-7 |
| Completion Standards: |
The lesson is complete when, to the satisfaction of the instructor, the student can select a specific angle of bank and apply control pressures to maintain the desired bank angle once it is established. |
Posted in CFI Lesson Plans |