Tom Lang's New Ideas, Theories, and Inventions
Copyright © Thomas G. Lang. All rights reserved.
As a spare time activity, I designed about twelve different versions of hydrofoil attachments for boats, and built each with the help of my father Glenn I. Lang from 1952 to 1960. The final design was licensed to Up-Right Hydrofoils which built and sold about 80 kits around the world, mostly in the U.S. This kit typically increased speed by ten mph, cut fuel use in half, and greatly reduced motion in waves.
About forty years later, as a spare time activity, I designed a planing SWATH (Small Waterplane Area Twin Hull) boat that was constructed primarily by my son James T. Lang and two of his college friends. After testing, I made a few changes to eliminate spray. This new design greatly reduces motion sickness in waves, and greatly increases speed in rough water.