One of the events we've used in fun flys is called "fast/slow". You need a timekeeper and two volunteers, one at each end of the field.
You have each participant fly as fast as they can down the runway, the volunteer at the first end of the field drops his hand when the plane passes and the timer starts his watch. When the plane passes the far end of the runway the second volunteer drops his hand and the timer stops the watch.
The pilot then repeats the process, but flying as slow as he can. The largest difference wins.
It's almost funny watching the guys who've never flown "on the wing" trying desperately to keep their planes from tipstalling into the ground. [>:]
Dennis-