On this installment of Retrotechtacular we’re taking a look at the history of the United States Antiballistic Missile System. The cold war was a huge driver of technological development, and this missile defense is a good example. At its most basic this is a radar system capable of tracking objects in three dimensions. It utilizes separate transmitters and receivers which are synchronized to rotate at the same time.
The movie, which is about forty-five minutes, came to our attention because of [Dammitd’s] interest in the Luneburg Lens used by the system. At about 11:10 into the video after the break this component is discussed. Inside a dome like the one seen above is a reflector made of blocks of polystyrene foam which has been laced with bits of metal. This lens is stationary, with the receiver rotating around it to collect the transmitter’s waves as the echos bouncing off an object in the sky are focused by the lens.
Continue reading “Retrotechtacular: History of the U.S. Antiballistic Missile Systems”
Earlier today, we looked at DIY ballistic glass, so we decided to look into DIY ballistic gel as well. Anyone who watches Mythbusters is probably already well familiar with their extensive use of this wonderful gel. Turns out the stuff is beyond easy to create at home. With some gelatin molds (and firepower) you could have a lot of fun with it.
To get started, pick up a box of gelatin powder from your local supermarket. Using 8 oz. of the powder and 2 quarts of cold water, stir together until the consistency is thick and all powder moist. Then, place the mixture in the fridge to chill for two hours. You will then need to heat the mixture until melted; be sure the liquid does not exceed 130 degrees. Finally, apply a layer of nonstick spray to your favorite mold or tupperware, and pour the mixture in. Allow to set in the fridge for 36 hours before use.
If you want even more DIY ballistics, check out this nice guide to creating your own chronograph, for measuring bullet velocity. After the break are videos on making and, of course, shooting the final product.
Continue reading “DIY ballistic gel”