The Processing of models before flights was quick and efficient. Wing span was measured both by a hanging string check and also an optical device. Two flights were scheduled to be made on each of three days, this being chosen in view of anticipated difficulties of crowded airspace at this site. An air traffic controler was designated, with authority to prevent a competitor launching if it could lead to a collision with other models. On the whole this scheme worked well with the active cooperation of the competitors. An adequate number of experienced timekeepers were available. Rods and balloons were supplied to each team for steering models. A very high standard of flying was seen and the result was in doubt until almost the end of the contest.