A funfly is an event that is open only to Constellation Club members.
A very popular event is WW2 Combat, where up to 4 models are in the air at the same time. Each model carries a paper streamer behind it and each pilot attempts to cut the streamers of the other models. Sometimes the pilot gets confused and flies his model directly into another model instead of the streamer. This is called a mid-air collision. When this happens “WAR” is declared and both pilots have to rebuild their models ready for next time.