So even if the wave design is a little less exaggerated in the wings of an airplane of savings in the wing tip vortices can be significant and therefore more efficient flight. The design of the hull in this case is a perfect compromise form for efficiency between salt water and fresh water since the [Continue]

If you have a passion for missiles or if you want to see their rockets fired into the sky in defiance of gravity of the earth, it is imperative that you learn some basic facts about model rocket motor. Seeing a model rocket off the ground is really fascinating but knowing the science and mechanics [Continue]

The 29th Air Force of Peru discovered that the Ecuadorians had installed a large-caliber antiaircraft machine gun which hampered the operation. All this led is planning a mass attack, using terrestrial and air, land and more than 400 men of the troops of the V region, would advance and attack enemy positions, preceded by air [Continue]

Mars Observer is a spacecraft built by the Americans to take a look at Mars. After arduous journey, scientists at the National Aeronautics and Space Administration (NASA) brought to heel eventually Mars Observer and the sky with a precise mission: Mars looking back and front, taking pictures from below and above. Educate yourself even more [Continue]

Build your own rocket using paper and fizzing tablets! Watch it lift off. How high does your rocket go? Print this page for the instructions. Suggestion: Find a grown-up to do this activity with you. Materials: Paper, regular 8-1/2- by 11-inch paper, such as computer printer paper or even notebook paper. Plastic 35-mm film canister [Continue]

Matchstick rockets are actual fully functional rockets that you can build in minutes from common household materials. They are also quite safe since each rocket is constructed from just one solitary little paper match. There just ain’t enough propellent to explode no matter how badly you go wrong in construction. To turn an ordinary paper [Continue]