The vintage plane that went down Sunday off Fort Williams in Cape Elizabeth, killing Dr. Louis Hanson of Durham, is delivered Tuesday to South Port Marine in South Portland. Workers for Sea Tow used floats to lift the 1946 Stinson Voyager out of about 60 feet of water before towing it to the marina, where it will be analyzed by federal investigators. It could take more than a year to complete the report on the cause of the crash.