Circuit Pattern Procedure

Filed Under (Flight Operations) by steven on 06-09-2009

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Circuit pattern flight usually used to perform landing excercises and to get more deepen your flight orientation. If you play music, it can be called a twelve-bar blues LOL. Circuit Pattern made with Visual Flight Rules (VFR). And for the VFR, ATC does not provide vector (heading), because the flight based on visual reference (visual reference). There are two types of circuit pattern, the Left Hand and Right Hand Pattern. Left hand pattern, if after airborne we turned left to join left downwind. As for right hand pattern, after airborne turn to the right to join right downwind. Here is the caption from the legs of the circuit pattern flight:
circuit pattern3

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The caption above shows that the airplane is gonna make ‘Left traffic pattern’, means after airborne the plane is gonna turn left to join the left downwind runway 23. Here is the details:

  • ‘A’ when plane’s airborne.
  • ‘B’ The plane is turning to the ‘Crosswind leg’
  • ‘C’ The plane is established on ‘Left downwind’ runway 23
  • ‘D’ is the area where the plane is joining ‘Base leg’ runway 23
  • ‘E’ The plane is ‘On Final’ runway 23
  • If the airplane is coming from the south of the airfield, airplane can enter the left downwind runway 23 at 45 degree to the downwind leg (see: light blue box).
  • If the airplane comes from the same heading with runway. airplane can join the ‘Upwind’ runway 23. Until at least 1 minute passing THE EDGE of runway 23 the airplane can turn to ‘Crosswind leg’ to join ‘Left downwind’ runway 23 (Purple box).

The same procedure if you want to make ‘Right traffic pattern’

Circuit Flight Radio Telephony for uncontrolled airfield And Circuit Pattern Airplane Procedure

I assumed that you already know how to make communication with active ATC. So here is  the Radio announcement procedure if you’re in the uncontrolled airfield. Just for example we take Polonia – Medan as the uncontrolled airfield.

  1. You scan the pattern for traffic and spot the airfield
    on downwind. It looks like there’ll be plenty of
    room, so to begin the takeoff you:
    • Announce “Polonia traffic, Skyhawk Four Zulu
    Sierra departing Runway Two-Three, closed
    traffic, Polonia.”
    • Line up. Turn the landing and anticollision lights
    on. Taxi onto the runway, and without stopping,
    align the aircraft with the runway centerline and
    take off.
  2. Departure Leg
    • Climb on the extended runway centerline beyond
    the departure end of the runway and to within 300
    feet of traffic pattern altitude. Polonia’s pattern
    altitude is 1,500 feet msl, so continue the departure
    leg until the altimeter registers 1,000 feet.
    • At 1,000 feet, look to the left and right to be sure
    there is no traffic conflict and announce “Polonia
    traffic, Skyhawk Four Zulu Sierra turning
    crosswind Runway Two-Three, Polonia.”
  3. Crosswind Leg
    • Climb to pattern altitude—1,500 feet msl in this
    case—level off, and reduce power to maintain a
    safe interval.
    • Continue on crosswind until approximately 1/2 mile
    from the extended runway centerline.
    • To help visualize this distance, use the
    runway itself. For example, if the runway is
    approximately one mile long (5,280 feet),
    use half its length as a guide for the turn to
    downwind.
    • As you approach the turn point, scan for traffic on
    downwind and announce “Polonia traffic,
    Skyhawk Four Zulu Sierra turning downwind
    Runway Two-Three, Polonia.”
  4. Downwind Leg
    • Establish the downwind track and begin the beforelanding
    checklist. Perform most of the landing
    configuration tasks while on this leg.
    • Retractable-gear airplane pilots should confirm
    the gear is down and locked while passing
    midfield on downwind.
    • All pilots should be especially vigilant, scanning
    and listening for traffic entering the pattern on the
    downwind leg. This could occur anywhere on
    downwind.
    • Select a touchdown spot on the runway, and as you
    pass that spot, begin the descent for landing by:
    • Reducing power to maintain approach speed
    • Setting approach flaps
    • Continue on downwind and plan the turn to base so
    as to achieve a 1/2 to 3/4-mile final approach leg.
    • Suggestion—turn base when the aircraft is 45
    degrees to the approach end of the runway.
    • Approaching the turn point, scan for conflicting
    traffic and announce “Polonia traffic, Skyhawk
    Four Zulu Sierra turning base Runway Two-Three,
    Polonia.”
  5. Base Leg
    • This leg is flown perpendicular to the runway
    centerline, but if there is any wind, the airplane will
    be crabbed toward the wind.
    • If dealing with a left crosswind on final, lead the
    turn to final approach.
    • Right crosswinds will delay the turn to final.
    • Be especially careful to scan and listen for
    traffic on base or final. Once turned toward the
    runway, it is difficult to see behind the aircraft.
    • Continue airplane configuration tasks.
    • Approaching the turn point, look out the right side
    to ensure the final approach path is clear, and then
    announce “Polonia traffic, Skyhawk Four Zulu
    Sierra turning final, Runway Two-Three, full stop,
    Polonia.”
  6. Final Approach Leg
    • On final, verify airplane configuration and set
    landing flaps.
    • There is a tendency for pilots to “lock on” to the
    touchdown zone. It’s imperative to continue scanning
    and listening for traffic as we slide down final. Clear
    both sides of the final approach path.
    • Maintain alignment, flare, and wait for that soulsatisfying
    squeak that says you’ve made another
    great landing.

Congratulation, you’ve made your circuit filght.

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Comments:

7 Responses to “Circuit Pattern Procedure”


  1. Great read! thx


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