Do traffic jams put your patience to its severest test ? Ever with you could just fly away from it all ? The day when you can might not be far away. First, however, you'd have to purchase a new midget plane. The fold-up airplane is so small that it fits in the back of a station wagon. Originally developed to be parachuted to downed pilot, the tiny craft may soon be sold to the general public. The machine is about the weight of the average adult male and can fly faster than seventy miles per hour .