Buy your pro boat 21-inch alpha patrol boat (prb08027) today at rcplanet.com and save on pro boat items.. With a hull drawing do an iom or rg 65 hull is very easy if we use balsa wood. the hull drawing have normally three views: bodyplan, profile and plan view. normally. Race along at up to 12.5mph with this self-righting boat, and have fast-paced fun for 10-20 minutes at a time. 2.4ghz 2 channel radio transmitter included. includes.