This page directs you to information on the control line stunt competition patterns. Below are the eligibility descriptions and dates for models in those events. It is very important for contestants contact the Contest and Event directors of any competition for variations. Except for OTS, there is no firm agreement on the dates.

The Old Time Stunt (OTS) pattern was taken from the flying years before December 31, 1952. This was an attempt to establish a uniform pattern on which to compete and judge. Today's OTS pattern is not exactly the same as it started; but, it still is challenging.

To help get persons into stunt and gain confidence, the Beginner Pattern is used . The planes must use models classified as Modern, Precision, or PAMPA as described below.

Each of the following use the same stunt pattern which, for the purposes of this web page, will be called the Modern pattern.

The Classic pattern was established to modify the OTS pattern to the higher capabilities of the post-1952 designs. This pattern is used for model kits available to the public by design publication or kit from January 1, 1953 through December 31, 1970.

One of the newest classification is the Nostalgia '79 pattern. It was established to allow competition between designs that were available to the public by design publication or kit from January 1, 1971 through December 31, 1979.

Another new stunt class is the P40 or Profile 40 pattern. It was established to allow competition available to the public by design publication or kit from January 1, 1971 through December 31, 1979. The primary differences between this and others are they are profile models and the engines cannot be larger than a .40 displacement.

The newest pattern known as the Modern, Precision, or sometimes PAMPA is the same as the Classic and Nostalgia patterns except it is for models available to the public by design publication or kit from January 1, 1979 until now.

The latest class is the Nostalgia 30. This is a rolling 30 yrs eligibility of the models. In other words, the model must have been available to the public or kitted in the past 30 years. That means any model 30 years old this year will not be eligible next year. The 30 year oldest models keep dropping off the eligibility list each year. Thus, the "rolling" characteristic.