Welcome to graves rc hobbies – your online hobby store and one-stop shop for remote controlled airplanes, helicopters, boats, cars and much more.. Fast electric rc boats, 20-50mph, lots of rc boat videos.we sell cen racing boats, how to info on building your own rc boat. top speed boat calculator program. This model was scratch built based on plans. 5 years to make, over 2 meters long, runs on 2 powerful electric 12 volt motors and 2 car batteries. because.