Speed is the typical maximum speed of the average aircraft. Speed range is another important characteristic and is shown in percent. PPC’s for example, have very little speed range since more power just makes them go up. PPG’s are similar but have more range since they have speed systems. FAR 103 mandates a max speed of less than 55 kts (63 mph) and stall speed of no more than 24 kts (27 mph).