Home / boat plans & kits catalog / outboards / 16′ tunnel king – tunnel hull: tunnel king tunnel boats, she is safe and tunnel king is easy when you use glen. Free plans to build rc power boats with information on racing . rc power boats and radio control boat plans for free download. tunnel hull hydroplanes,. Clark craft offers hundreds of boat plans, tunnel hull racer 9 – # tu 9: the sleek tunnel racer, tunnel hull racer 9: length: 9′ 6" beam: 53".