2.The penalties are well known: for instance, anyone who exceeds the stipulated speed limit (at most tracks, 80 km/h in practice, 100 km/h during qualifying and the race) is fined US$250 in practice and qualifying for every kilometre per hour over the limit.
3.Fruit and conclusion(1)using 100～125 watt shortwave transceiver radio,matching 9 meter whip antenna,at 8～14 MHz frequency,at time of 8～24o’clock,at distance of 0～3000 kilometre the able-calling ratio of the ground-to-air communication is more than 70%;
