How two-stroke engines work
By: Nigel Holmes
The two-stroke engine, as found in chain saws, mopeds and boats, is a compact and efficient version of the four-stroke engine used in cars and trucks. (For an understanding of how the four stoke engine works, read “How Car Engines Work.”) Two-stoke...
By: Srikanth Radhakrishna
A two-stroke engine is an internal combustion engine. This type of engine is called a "Two-stroke engine" because there are two strokes: a compression stroke and a combustion stroke. Two-stroke engine was first designed in the year 1878 by Sir Dugald Clerk, a Scottish engineer...
Science explained
By: Satishchandra Salam
Science, or scientia in Latin for “knowledge”, is an enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the world. Its purpose is to explain nature and subordinate it to man. In the course of evolution, nature has...
By: Dean Traylor
On April 5, 2011, in California’s Newport Beach Harbor, British billionaire and adventurist Richard Branson stood on top of his latest "toy", a relatively small vehicle with tails, wings, and a cockpit. It was a photo-opportunity and the grinning tycoon knew he had the...
By: Michael Totten
After being criticized for environmental pollution, a crematorium in the small Swedish port city of Halmstad has found a novel solution to its problem. Instead of letting all the heat from the crematorium furnaces escape into the chimneys and then also having to spend energy...
By: Kenneth Andrews
The question of how jets survive direct strikes by lightning was raised again recently when an Airbus 380 from Dubai was struck by lightning while approaching the runway at Heathrow Airport in London. The lightning strike was caught on camera, which captured the world's imagination...
The difference between mig and tig welding
Mig
By: Asylem
Most welding processes use acronyms as their name. For example "SMAW" or "stick" welding stands for Shielded Metal Arc Welding. Each arc welding process has the same root principal: fuse two or more pieces of metal together using an electric arc as a heat source...
By: Bruce Tyson
Popular Science has featured an Invention Awards for five years. This year’s ten top inventions, according to Popular Science, are carrying on the tradition of past awards years. The inventions highlight genius, creativeness, care for people and the planet and the unbelievable dedication of...
By: Bruce Tyson
As we watch the crew of the last Space Shuttle mission go through their tasks, it is with a sense of sadness that we reflect on what has been, for most of us, a lifetime experience. The United States has been at the pinnacle of...
By: Elizabeth M Young
The alien origin of crop circles is frequently debunked by the best of scientists and technologists. The extraterrestrial origin of crop circles is frequently made convincing by the best of scientists and technologists. Do pranksters with time and money on their hands continue to make...

 

1 120 121 122 123 124 132