The Aeroscraft actually aloft Aeros A class of aircraft is rising from the near-dead. The Aeroscraft ML866, which entered production in early September, is poised to be the world's largest aircraft — and it's a dirigible. If the term is unfamiliar, it's probably because many people incorrectly refer to all dirigibles as blimps. It also could be because dirigibles all but disappeared after 1937, when the Hindenburg caught fire and crashed in New Jersey, killing 36 people. May 15, 1936: The Hindenburg rests in Frankfurt after completing a record flight of 48 hours in the air, May 15, 1936. Corbis Dirigibles, or airships, are any powered, steerable, lighter-than-air aircraft. They achieve lift via inflation with gases that are more buoyant than air, and they come in three types: 1. The blimp, which has no internal structure and maintains its shape only through inflation (like a balloon, but not a hot air balloon, which you can't steer. 2. The semi-rigid … [Read more...] about Dirigibles: Bobbing Along Toward a Comeback
Hydrogen jet turbine
Torpedoes either use batteries and an electric motor or a special kind of fuel to propel themselves. Purestock/Getty Images A torpedo is essentially a guided missile that happens to "fly" underwater (see How Cruise Missiles Work for details on missiles). A torpedo therefore has a propulsion system, a guidance system and some sort of explosive device. Torpedoes can travel several miles on their way to the target, and therefore they need a propulsion system that can run for 10 to 20 minutes. Most missiles that fly through the air use either rocket engines or jet engines, but neither of these work very well underwater. Torpedoes use one of two techniques for propulsion: Batteries and an electric motor -- This is the same technique that any non-nuclear submarine must use when running underwater.Engines that use special fuel -- Most engines that we are familiar with, like car engines and jet engines, draw their oxygen from the air around the engine and use it to burn a fuel. A … [Read more...] about How do torpedo engines work under water?