Archive for December 4th, 2009

Powered Parachutes – History And Practical Uses

Friday, December 4th, 2009

A powered parachute is a parachute with a motor and wheels. The aircraft can typically reach speeds of around twenty five to thirty five mph. They can operate safely at heights ranging from just a few feet off of the ground to altitudes as high as eighteen thousand feet. Generally though, their operating heights are somewhere between five hundred and fifteen hundred feet. Powered parachutes can typically be flown around for three hours, if they are equipped with the standard five to ten gallon fuel tank.

A motorized parachute is thought by many to be safer when compared to a normal, fixed-wing aircraft because of its stability, limited response to control inputs and resistance to stalling. The power-off glide ratio ranges anywhere from three to one, to six to one. Glide ratios vary depending on the parachute shape and size and the weight that the parachute is carrying. Although it is possible, it is very difficult to cause a powered parachute to get to a dangerous altitude, stall or have the chute collapse by means of pilot control error. Many pilots consider a chute collapse to be virtually impossibility with square wings, such as ones that powered parachutes have.

A hydro-copter is an amphibious aircraft-propelled catamaran and is considered to be a type of powered parachute equipment. The vehicle has hull similar to a boat, with small wheels and pontoon skids. An aircraft engine with a propeller and rudder pushes the hydro-copter across ice, water, snow and land, where other vehicles or aircraft simply cannot travel in such conditions.

The first patent for a powered parachute prototype was applied for on October 1, 1964, by a man named Jalbert. He described his new vehicle as a multi-cell wing and called it a parafoil. A parafoil is a non-rigid airfoil with an aerodynamic cell structure that is actually inflated by the wind. Air inflation forces the parafoil into a classic wing cross-section, which was a new parachute design. His ideas were finally registered as U.S. patent 3,285,546 in November of 1966. But, a motorized version similar to this design had already flown in 1964. In March of 1981, Steve Snyder, Adrian Vandenberg and Daniel Thompson created the P-1 powered parachute. Their first flight only lasted around twenty five to thirty seconds, mainly because the paraglider they used suffered from torque problems. It took two more years to fix the problems, and in 1983, the first commercial paragliders were produced.

Recent advancements by Don Shaw have further developed powered parachutes. He mounted a standard motor scooter with a propeller and a parafoil and the combination can both fly and drive on the road as a regular ground vehicle. Conversion kits for this prototype vehicle are available, though powered parachute training may be needed.

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Casino Chips And Security Issues

Friday, December 4th, 2009

Casino chips aren’t your regular run-of-the-mill poker chips used in casual home games. These have a long history of development and design, usually responding to cheating or security issues as they arose. In the mid-19th century, in bars in the American Midwest and in the old river-boats, poker players would use anything from coins to gold nuggets as they gambled. But eventually, by the end of that century, the clay poker chips casino establishments use became the standardized monetary tokens used in these games.

These chips were first made of various materials such as wood or ivory, but the casino poker chips of a clay-based composition soon came to predominate. These were made in high-pressure compression-molding machines. In recent times, though clay-ceramic mixtures are still used to create some chips, the more usual production method involves injection-molded resin chips. And a recent innovation in the design of casino chips involves either a metal center with a plastic rim, or chips entirely of metal. The standardization makes chips easier to stack on a table, easier to keep track of, and easier to count (or weigh) when it comes time to cash in a player’s winnings.

The design of casino chips has always continually been embellished and perfected in response to security issues. In the early days, players could easily cheat by sneaking their own chips into games. But once the casinos developed their own custom designed poker chips that became harder to do. Now there are security features such as markings that only show up under ultraviolet light, or radio frequency ID tags that make the chips harder to counterfeit. And of course, almost since its adoption in casinos, clay poker chip designs incorporate distinctive artwork and custom colors.

As technology continues to expand, though, it may eventually sound the death knell for casino chips, whatever security features they have. The introduction of token-counting machines that eject receipts has prompted some experimenters to take the concept to its final limit, introducing a pre-paid money card that works with a reader at the gaming table. If gamers’ attachment to the casino poker chip doesn’t survive this technological development, the chip could disappear altogether. And all that would be left will be collectors’ items and the romance of legendary history.

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WoW – The Greatest Game Of Our Time

Friday, December 4th, 2009

One of the most popular and used games of the present time is a massive multiplayer online role-playing game named the World of Warcraft. Whenever you log in the game you will see that thousands of WoW player from all over the world are in the game and it is not important whether you log in in daytime or in the night, situation is the same – thousands of people are still there, playing their favorite game. The Warcraft servers are situated in all corners of the globe – from Japan to the USA. The task which are fulfilled by these people at any time are mining, grinding, selling. All these gamers are connected by one and the same goal – to earn as much as possible and to level up as fast as they can. Passing of another level can take from several hours to several days. Leveling in WoW is a very long-lasting process. Some people spend months in front of their monitors trying to reach 60thlevel, some need weeks to do the same. You cannot wait to get to the level 60 fast if you can spare just a couple of hours a day. If you want to level up your character faster than in several months, you have to spend much time playing World of Warcraft. Do more quests, kill rivals, visit Auction house more often in order to get more scores. If you decided to succeed in the World of Warcraft, you have to know more about quests. Quests are tasks that you receive from a WoW character, which is not a real gaming person.

Quests can be different – some of them are more difficult and some are easier to do. They can also consist of several tasks that must be done on the territory presented not by one, but by several maps. As an example of the task that can be given to you, we can offer the following one. You are to kill a certain number of enemies for example. Unless all these enemies are killed, the quest is not finished. Actually the quests are the basis of the World, the whole game is built on them. These tasks also provide an interaction between all Warcraft characters, including both real personages and unreal characters of the game.

Another work in the World is called grinding. It is a trip around the World, the main aim of which is usually searching for enemies in order to kill them. There are certain criteria, according to which you are to choose and kill enemies. Grinding proved to be one of the most effective ways to get more scores and experience, but it is also one of the most boring work in the game. The number of scores you can get from killing enemies becomes less as your levels go up. When you are at level 20 you cannot get almost anything from killing rivals.
So, now you have all needed information on how to earn your WoW experience and it is up to you to decide what you what occupation to choose.

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Types of Poker Chips

Friday, December 4th, 2009

When you play your poker games at home with family or friends, it’s almost certain that you’re using poker chips that are very different from the ones seen in North American or European casinos. Home chips are mass-produced plastic versions, and are fairly inexpensive. They are basically imitations of the original clay pokerchips developed for casinos from the 1880s to the 1930s.

The clay chip sets that have been traditionally used, and which are still used in some places even now, weren’t made entirely of clay except at the very beginning. It was soon discovered that the clay-only chips broke too easily, so the makers began creating them from composites, of which the most common one now is a clay-ceramic mix. It’s very unlikely that you’ll find this type of chip in a home set, however; as these would most usually be casino poker chips.

Some recent developments in poker chips also involve something like composites; the core is made of metal, with injection-molded plastic added over top. There are now even completely metal chips where colors and patterns are set into them by utilizing chemical or electronic processes. When one of these partially metal or all-metal chips has color, stamping and a pattern added, it may be hard to distinguish it from the older, more standard casino chip. But certainly the metal chips are more likely to be found in casinos, rather than in a home poker set, because of the expense.

Among the various kinds of poker chips, the ones most common today are those made of cheap plastic that you’ll find in home sets, and the most widely used professional casino versions, which resemble the original clay composite chips, but tend now to be made with a hard, injection-molded resin. Both these and the clay composites are made with formulas that are often specific to an individual casino, and will usually come with several security features, including marks that show in UV light, or radio frequency ID tags. The plastic home versions may distantly resemble these, but the casino poker chips will always be the authentic deal.

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