Mendham High School student Beckerman builds one and a half -man submarine . The Submarine can dive to five feet and travels at one and a half miles per hour . The two main batteries are from a child 's ride-on toy , and its PA speakers are made from an old car stereo . Inventive teen has also built airplanes , boats , robots , and architectural constructions .
Mendham High School student Beckerman builds one and a half -man submarine . The Submarine can dive to five feet and travels at one and a half miles per hour . Inventive teen has also built airplanes , boats , robots , and architectural constructions .