From the American entry into World War II until September 1943, U.S. submarines experienced an abnormally high number of torpedo failures. These failures resulted from three defects present in the primary torpedo of the day, the Mark XIV. These defects were a tendency to run deeper than the set depth, the frequent premature detonation of the magnetic influence exploder, and the failure of the contact exploder when hitting a target at the textbook 90-degree angle. Ironically, despite using a completely independent design, the Germans experienced the same three defects. The Germans, however, fixed their defects in six months, while it took the Americans 22 months. Much of the delay on the American side resulted from the denial of senior leaders in the operational forces and in the Navy’s Bureau of Ordnance (BuOrd) that the torpedo itself was defective. Instead, they blamed crews for poor marksmanship or lack of training. In the end, however, the submarine force itself overcame the bureau… More >>

Iron Men and Tin Fish: The Race to Build a Better Torpedo during World War II

Do you like to build things? Are you ever frustrated at having to compromise your designs to fit whatever parts happen to be available? Would you like to fabricate your own parts? Build Your Own CNC Machine is the book to get you started. CNC expert Patrick Hood-Daniel and best-selling author James Kelly team up to show you how to construct your very own CNC machine. Then they go on to show you how to use it, how to document your designs in Computer-Aided Design programs, and how to output your designs as specifications and tool paths that feed into the CNC machine, controlling it as it builds whatever parts your imagination can dream up. Don’t be intimidated by abbreviations like CNC and terms like Computer-Aided Design. Patrick and James have chosen a CNC-machine design that is simple to fabricate. You need only basic woodworking skills and a budget of perhaps $500 to $1,000 to spend on the wood, a router, and various other parts that you’ll n… More >>

Build Your Own CNC Machine

A 31-Day program written by Master Business Coach Catherine that will help you systemtize your business.Kindle blogs are fully downloaded onto your Kindle so you can read them even when you’re not wirelessly connected. And unlike RSS readers which often only provide headlines, blogs on Kindle give you full text content and images, and are updated wirelessly throughout the day…. More >>

31 Days to Build Better Systems for Your Business