I went back on google and looked in images. I found a couple of hobby shops that are still selling them. I messaged both of the sites that I found to see if they might have some info on a replacement rudder. But if you look in google images you will be able to see the rudder. I believe that they are calling it the ocean queen mosquito. The boat itself is 45" long and is a 1/12th scale if that might help in determining a retro rudder for it. It also is equipped with three 550 electric motors. A prop for each motor 3ea.