Monday, September 6, 2010

Day Eight – Introduction to the Circuit


A circuit is the path aircraft must follow when operating in the airspace near aerodromes. It allows for the orderly and safe movement of aircraft and is managed by ATC or the “tower”. A circuit is actually a rectangular series of paths or “legs” that begin with takeoff and end with landing. After takeoff you climb straight ahead to about 1300’ and make a 90 degree left-hand turn to the “crosswind” leg. On the crosswind you continue to climb to circuit altitude (approx. 1000’ above aerodrome elevation) which in the case of St. Andrews is 1600’. Another 90 degree turn takes you on the “downwind” leg running parallel to the active runway. Once you are well past the end of the runway, another 90 degree turn brings you onto the “base” leg where you begin your descent. One last 90 degree turn brings you back in line with the runway for landing. Most circuits are left-handed (Roger would be pleased to learn), meaning each turn is to the left, but it can also be right-handed. Of course, planes come in to and out of the circuit in many different ways depending on circumstances.

Unfortunately, the wind was gusting to over fifteen knots today. Paul tells me that mastering the circuit is one of the more challenging aspects of training. He didn’t think it would be a good idea for me to start learning in such challenging conditions. Putting theory into practice will have to wait.

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