A rocket vehicle that (1) is propelled by one or more high power rocket motors; or (2) is propelled by a combination of model rocket motors having an installed total impulse of more than 320 N-sec (71. 9 lb-sec); or (3) is propelled by a combination of model rocket motors having more than a total of 125 g (4. 4 oz) of propellant weight; or (4) weighs more than 1500 g (53 oz) with motor(s) installed.