Thursday, 20 February 2020

The Rainbow Eucalyptus (Eucalyptus deglupta)

While eucalyptus trees may inspire thoughts of the land “Down Under” and koala bears, the rainbow eucalyptus (Eucalyptus deglupta) is unique among eucalypts. Unlike other members of the genus, rainbow eucalyptus hails from the Philippine Islands; specifically, the island of Mindanao, which is why the tree is also referred to as a Mindanao gum. E. deglupta was introduced to the Hawaiian Islands in 1929.
In fact, many people have their first experience with these trees while visiting Hawaii. Rainbows are tropical trees accustomed to a rainforest type of environment. While they grow more slowly in the cooler winter weather of South Florida, the trees retain their leaves year-round. Rainbows should be protected from freezes, but they can withstand light frost conditions for short periods. Summertime is when these trees can really show their vigor and growth speed. They may grow 8 to 10 feet in a growing season, and even more with extremely good care.

Beautiful Bark
The tree gets its common name from the striking stripes of color on its trunks and limbs. While they look as though they were painted on, these ever-changing colors are an entirely natural feature. Unlike trees such as oaks, rainbow eucalyptus does not have a thick, corky layer of bark on the trunk. Instead, the bark is smooth and vibrantly alive, and as it grows, it ex-foliates thin layers of spent tissue.
This process occurs in irregular zones at different times. Once the layers come off, they reveal new and fresh green bark. As the newly exposed bark slowly ages, it changes from bright green to a darker green, then bluish to purplish, and then pink-orange. Finally, the color becomes a brownish maroon right before exfoliation occurs. Since this process is happening in different zones of the trunk and in different stages, simultaneously, the colors are varied and almost constantly changing. As a result, the tree will never have the same color pattern twice, making it like a work of living art.
Water Liberally
Water is very important to rainbow eucalyptus, especially when it is young. If this tree is grown under conditions where water is not abundant, the growth rate will be much slower, and the exfoliation will occur in small flecks rather than long strips. When growing in containers, never allow E.deglupta to dry out, as this can prove fatal to the tree very quickly. For landscape use, the ideal location for rainbow eucalyptus is near freshwater ponds, lakes, or canals. Mature trees can survive and grow in drier areas, but they become their most luxuriant when they have access to abundant moisture.
Other Advantages of E.deglupta is largely pest-free. Occasionally a few mealybugs or aphids may appear, and the odd caterpillar or leaf-cutting bee may disfigure some leaves, but the tree can be grown without excessive concern about pest damage. Growers should consider an application of mycorrhizal inoculums to their plantings, especially when planting in developed areas where the soil has been severely disturbed. Although rainbow eucalyptus is a wonder to behold and can add a magical dimension to the landscape, it produces none of the familiar aromatic oils that other eucalypts do — making it ideal for those who desire a quieter olfactory environment. This tree deserves to be more widely planted in the warmer climate areas of the mainland United States.
  



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Sherk The Sheep – Who Escaped Shearing for Six Years

This is a very interesting story of a sheep, who escaped for 6 years before being had a shorn (haircut). The sheep gained international fame in 2004 in New Zealand when Shark, the Merino Sheep was shorn live on National Television. This is so dangerous to have so much fleece on the body, can become a health and safety concern even though his eyes were completely covered.
Sherk, massive fleece could be largest ever is to be used for charity purposes for children. Sherk, looked like a biblical creature, use to evade capture by hiding in a cave. The Merino Sheep normally shorn annually, but he managed to hide for six years and finally caught on 15 April 2004. The experienced individuals take 10 to 15 minutes to complete the shearing process.
When Sherk the Sheep was finally caught at Bendigo Station, no one believe that this is a sheep. Sherk was shorn with sharp scissors, and its 27kg fleece is more than enough to make twenty large men’s suits. An average Merino Sheep has 4 to 5 kg fleece. Although, Sherk was too old to sell in the mutton market, so it was used in promoting New Zealand lucrative trade in wool.
Sherk, becomes a national icon, was taken to parliament to meet with Helen Clark (Prime Minister in 2004). So, far it was a record of the longest staple of wool ever shorn from a sheep. Sadly, the adorable Sherk died in 2011 at the age of 16. But you will love and remember for your wool.
The moral of this story is thought-provoking to look inside everybody. Because, our sins grow like this Sherk wool, becoming a massive burden that weighs us down to death. Our bodies cannot survive too long to put the pressure of sins on our hearts and souls.







Saturday, 8 February 2020

The Secrets of the Great Pyramid

Secrets of the Great Pyramid after a few days of scuba diving along the Red Sea coast of Egypt in early 1985, two French architects went on an excursion to see the Great Pyramid of Cheops at Giza. As they examined the huge structure, they noted several things that simply did not make sense to them. Some of the pyramid's immense stone blocks, for example, are stacked vertically, rather than staggered in their usual pattern. And in certain parts of the pyramid, curious roughhewn stones crop up during polished limestone. Like generations of pyramid visitors before them, the two Frenchmen, Gilles Dormion and Jean-Patrice Goldin were captivated by the great monument. And like so many others, they believed that they could penetrate its mysteries.
The structural anomalies, the architects deduced, were clues to hidden, previously unknown rooms within the pyramid. They speculated that one such secret chamber might even contain the remains of the Pharaoh Cheops himself, thus resolving one of the pyramid's eternal questions: Where is the body it was presumably built to entomb' Dormion and Goidin had considerable technological advantages over previous pyramid detectives. After several exploratory visits to the stone hallways, they returned in August of 1 986 with a microgravimetry, a sophisticated instrument capable of registering density voids, or cavities, within the pyramid.
And behind the walls of a corridor leading to the room known as the Queen's Chamber, the device detected the voids predicted by the architects. Encouraged, the two men got permission from Egyptian authorities to drill into the ancient limestone walls in search of the pyramid's secrets. For days, the architects and their colleagues worked in the cramped passages of the pyramid, their drills chewing through more than two yards of rock in three different places. But all they uncovered were pockets of fine, crystalline sand: The micro gravimeter, it seemed, could indicate the presence of voids in the pyramid but could not pinpoint their precise location.
The secret chambers, if they exist, remained hidden. The Great Pyramid had thwarted yet another attempt in the long, frustrating, and fascinating quest to unravel its abiding riddles. Since the time of the classical Greeks, people have gazed at this sole survivor of the ancient world's seven wonders and asked questions they could not answer. Why was it built? If it was a tomb, as conventional wisdom has generally supposed, why were no symbols or possessions of royalty- much less a royal corpse— ever found? If it was not a tomb, what was it? And how was it built? How, given the building techniques of the day, could one explain the astonishing precision of its construction, its near-perfect alignment to the points of the compass, the exquisite accuracy of its masonry.
If the pyramid's design incorporates advanced mathematical and astronomical knowledge, as many investigators believe, how did its builders acquire such wisdom so far in advance of other civilizations' Could the enigmatic structure even harbor some sort of mystical powers beyond the realm of conventional science? More than a few archeologists, astronomers, religious scholars, and amateur pyramid enthusiasts have argued such questions through the centuries. While archeologists focus on the structure purely as a historical artifact, other investigators have usually fallen into three schools of thought. The first, and most common, holds that the pyramid represents a universal system of measurement, that its very dimensions embody archetypal measures of length and even time.
A splinter group of nineteenth-century pyramid students founded the second school, focusing on the structure's extraordinary properties as a gigantic sundial and an astronomical observatory. This so-called archeoastronomy made a strong case that the pyramid builders, whoever they were, had an awareness of astronomy and the earth's dimensions far superior to anything previously imagined. As the fascination with the pyramid continued into the twentieth century, a third and far more speculative school arose, concentrating on the pyramid shape itself and its alleged physical effects on both living things and inanimate objects.
These researchers claimed that the pyramid shape could somehow help plants grow, keep food fresh longer, and even sharpen dull razor blades. Still, others have accounted for the mathematical wisdom the structure supposedly embodies by imagining that its builders came from lost Atlantis, or even from another planet, or from both. The pyramid itself maintains a stubborn silence. It has never been completely explored nor completely explained.
The pyramid of Cheops rises in its enigmatic majesty from the rocky Giza plateau ten miles west of Cairo. Glimpsed through the branches of the acacia, eucalyptus, and tamarind trees that line the boulevard leading to the plateau, it vaults up from a wind-scraped flat on the edge of the Libyan Desert with dramatic suddenness, a breathtaking mountain of sand-colored stone looming above the lush palm groves of the nearby Nile. Caravan travelers approaching from the desert in ages past saw it for days before they reached it, a tiny triangle on the horizon bulking ever larger in its symmetrical perfection. Close up, its grandeur is overpowering.
The Secrets of the Great Pyramid

Numbers can only suggest its immensity-a ground area of 1 3. 1 acre, the edifice itself composed of some 2.3 million limestone blocks averaging two and a half tons each. The structure contains enough stone to build a wall of foot-square cubes two-thirds of the way around the globe at the equator, 16,600 miles. The Great Pyramid and the two others that stand near it on the plateau-attributed to Cheops'simmediatesuccessors- were erected during the period of Egyptian history known as the Fourth Dynasty, between 2613 and 2494 b c Egyptologists believe that Cheops (as the Greeks knew him; his Egyptian name was Khufu) ordered the immense building raised as a tomb and monument to himself.
Its outer shell was originally composed of highly polished limestone blocks fitted together with painstaking precision, but these casing stones were stripped off in the fourteenth century and used in the construction of Cairo. At some point in history, the original capstone, forming the top thirty-one feet of the pyramid, was also removed. Egyptologists have drawn on their knowledge of Egyptian religion to explain the significance of the pyramid shape, contending that it could have related to sun worship. The angled walls, they say, resemble the outspread rays of the sun descending earthward from a cloud, and the pyramid thus represents a stairway to the heavens.
Some students of the ancient Egyptian Book of the Dead, such as the modern occultist writer Manly P. Hall, even maintain that the pyramid provided more than a merely figurative passage to celestial realms. According to Hall, the building was a secret temple where the elect underwent a mystic ritual transforming them into gods. The initiates would lie for three days and nights within the pyramid while there too- the soul or essence— left their bodies and entered ' 'the spiritual spheres of space. " In the process, the candidates "achieved actual immortality" and became godlike.
More down-to-earth questions surround the issue of how, in an age without pulleys or the wheel, the massive pyramid was built. But archeologists have guessed at a general scenario: The builders somehow leveled the site and then aligned the sides of the building by making repeated observations of circumpolar stars to determine true directions. At quarries a few miles away, masons cut the limestone with stone hammers and copper chisels. Crews consisting of hundreds of workers then dragged the blocks to the site; granite used in some parts of the interior was ferried down the Nile from a site about 400 miles distant and hauled up a causeway from the river.
The Secrets of the Great Pyramid

To pull the multitone blocks up the sides of the rising pyramid, they may have used a spiraling earthen ramp, although some experts believe they levered the stone upward on planks and wooden runners. The blocks were then fitted together with hairline precision, displaying an accuracy of engineering that impresses even present-day builders. Many observers have doubted that so massive a structure as the Great Pyramid— a miracle of engineering, a prodigy of decades of backbreaking labor under the blazing sun could have been intended merely for the housing of one royal mummy. Alternate explanations have flourished since the pre-Christian era.
The Roman historian Julius Honorius declared that the pyramids were storehouses for grain. (Another early writer opined that the structures were extinct volcanoes.) The Arabs who ruled Egypt for centuries thought that they were repositories of ancient knowledge, built by earlier rulers who feared a catastrophe, perhaps the flood; local folktales claimed that the Great Pyramid incorporated both a guide to the stars and a prophecy of the future. Superstition trailed legend: Ghosts patrolled the corridors, the Arabs said, as did a naked woman with unsightly teeth who seduced trespassers and drove them mad.
The Greek historian Herodotus was the first visitor to gather and record information about the Great Pyramid in a systematic way. Herodotus visited Giza in the fifth-century bc, when the structure was already 2,000 years old and wrote a description of its construction based on his conversations with local Egyptians. Unable to go inside the edifice (its end- 48 trance was hidden), he accepted his informants' claim that the pyramid was a tomb built to the tyrannical Khufu. The king's burial vault, they said, lay underground. One hundred thousand men labored on the pyramid, according to Herodotus, with fresh crews thrown onto the project every three months.
They built the causeway from the river to the plateau in ten years; the pyramid itself took another twenty years to complete. Engineers lifted the gigantic stones up the sides of the structure step by step using "machines formed of short wooden planks" on each step. Herodotus did not elaborate on how these machines worked. He was also told that outer casing stones were installed from the top-down after the interior core was in place. These glistening, highly polished stones were covered with inscriptions- later lost when the blocks were carted off to Cairo.
The Secrets of the Great Pyramid

Herodotus was interested in the Great Pyramid primarily as an engineering project. But the next pyramid explorer known to history had a somewhat different perspective on the structure and introduced what was to become an abiding theme of pyramid studies: the quest for the mathematical wisdom possessed by the ancients. The ninth-century Arab caliph Abdullah Al-Ma mun was a young ruler with a scientific turn of mind and a special interest in astronomy.
He dreamed of mapping the world and charting the heavens, and he turned his attention to the pyramid when he learned that its secret chambers reportedly contained highly accurate maps and tables executed by the pyramid builders in addition, and perhaps of more interest to the caliph's fellow explorers, great treasure was said to be hidden somewhere within. Arab historians later told the dramatic tale of how the caliph and his team of architects, builders, and stonemasons set to work in ad 820.
Unable to find an entrance to the inscrutable structure, they launched a frontal attack, heating the limestone blocks with fire and then dousing them with cold vinegar until they cracked. After burrowing through 100 feet of rock this way, the explorers finally reached a narrow, four-foot-high passageway that climbed steeply upward. At its upper end, they found the pyramid's original entrance, forty-nine feet above the ground, blocked and hidden by a pivoting stone door.
Turning around, the explorers followed the passageway downward. After crawling on their hands and knees through the inky darkness, they were chagrined to find only an unfinished, empty chamber. If secret writings or a king's ransom were to be found in the pyramid, it would be elsewhere. The excitement was rekindled, however, when Al Mamun's men returned to the passageway and discovered what looked like another corridor sloping upward.
Unfortunately, its entrance was filled by a large granite plug, obviously placed there deliberately. The granite was impervious to their hammers and chisels, but the determined Arabs found that they could chip through the softer limestone blocks around it. As soon as they did, though, they found another granite obstacle and then several more. Someone had been determined to bar intruders from the pyramid's inner sanctum After laboriously hacking their way around the series of plugs, the explorers emerged into a low-ceilinged corridor that slanted upward until it intersected a level passageway.
This led them to an eighteen-foot-square, twenty-foot-high gabled room that would later become known as the Queen's Chamber (because of the Arab custom of burying women in tombs with gabled roofs). No queen was in evidence, however; this chamber, too, was empty.
The Secrets of the Great Pyramid

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Saturday, 1 February 2020

Mutt - The French Bulldog of WWI

I recently stumble upon a brave dog who served the US military in World War 1. That is Mutt the French Bulldog who worked as a trench messenger in World War I - From the famous book "War Dogs - A History of Loyalty and Heroism" comes this description of Mutt - "Mutt' a "trench runner' Frenchie delivered cigarettes and gave his friendship to the soldiers.
You know, normally dogs provided a psychological comfort, even if for just for a few moments. Mutt Bulldog was badly wounded twice but could not stop to provide energy to front line troops and he also spent most of WW1 boosting the morale of the US Army11th Engineers. Therefore, when World War 1 finished, the mascots were usually left behind.
However, Mutt Bulldog was luckily smuggled on board. When Mutt was discovered and under threat of being thrown overboard. But his savior said they'd have to throw him overboard also. Hence, Mutt returned safely to New York." In the later years, French Bulldogs were so popular among in high society of wealthy Americans. When Mutt back to New York, he lived his remaining days before dying of natural causes a few years later.
Mutt Bulldog was a real companion in world war 1, that provided many services, like comfort, delivering the goods, finding wounded soldiers in the battlefield, pull and push war weapons, sending messages between the lines, sniffing oppositions positions, and battalion mascots.
Mutt brought happiness on the faces of many soldiers in the worst ever war. Just imagine, how difficult for a dog to provide supplies on the battlefield. That is an awesome job he had given in horrific time in humankind's history. He proved Mutt was a loveable, faithful and loving companion.
Popular footage of Mutt the French Bulldog in the World War on Dailymotion. Sadly, there is no audio, and nothing clear what is happening in this video.
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Sunday, 12 January 2020

When Ice Hockey was First Played?

Another interesting question is where did the Game of Ice Hokey Originate? It is considered to be the fastest game in the world. It is played by two teams of six men in action at one time. Extra players or substitutes, sit on the sidelines. Each tries to do two things: put a small rubber discs, called a “puck” into the opponents net and prevent the opponent from scoring.
These days, Ice hockey is one of many games played with a stick and a ball. Such games are believed to have originated in Persia. Where the game of polo began, we know that the ancient Greeks played a kind of hockey and even included it in their Olympic games.
There is a wall in Athens, Greece, which is about 2,400 years old that has carved pictures of young men playing a game that is much like the field hockey of today. Ice Hockey originated in Canada more than 100 years go. One claim is that English solders played an early form of ice hockey on the frozen surfaces of Lake Ontario at Kingston, Ontario, as early as in 1867.
The first organized ice hockey leagues are claimed by both Kingston and Montreal. It is known that there definitely was an ice hockey league in Kingston in 1885. In 1890, the Ontario Hockey Association was organized with ten teams. However, in 1914 the Canadian Amateur Hockey Association was formed with a few thousand players.
So the birthplace of amateur ice hockey was Canada. But the United States organized ice Hockey on a professional basis for the first time. In the winter of 1904-1905, a professional ice hockey league was formed at Houghton, Michigan. The world’s only major professional league, the National Ice Hockey league, was started in 1910. The NHA (National Hockey Association) define the rules of three 20 minutes half, introducing three minor and major penalties. Later, the Ice Hockey got popular in Europe by introducing multiple leagues across.

Sunday, 29 December 2019

A Girl Made From Flowers

The story of Blodeuwedd tells of how a young woman was created by two magicians. They were Math and Gwydion, to be the wife of Lleu Llaw Gyffes, who had been condemned by his mother to have no human wife. But Blodeuwedd, the woman they made, is unfaithful to her husband, who then kills her lover. Blodeuwedd ends up being turned into an owl, condemned to fly only at night and to live ostracized by all the other birds of the air.

The Children of Arianrhod
Gwydion presented his sister Arianrhod to Math. He made the young woman step over a magic wand to test her virginity. But as she stepped over the wand, she dropped two small children. The first was called Dylan, but the second boy remained unnamed, as Arianrhod insisted that he would have a name only when she was ready to give him one. She then placed two more taboos on her son.

The tricks of Gwydion
Gwydion dealt with the first taboo— not naming the boy—by tricking his sister into calling him Lleu Llaw Gyffes (“Bright One of the Skilful Hand”). Her second taboo was that he would not bear arms until she was ready to arm him, but again Gwydion tricked her, and she equipped her son. Finally, she declared that her son would never have a human wife. This time Gwydion sought the help of Math, and together the pair used their magical powers to make Lleu a beautiful wife from the flowers of the broom, meadowsweet, and oak. The woman they created was called Blodeuwedd.

The treachery of Blodeuwedd
Blodeuwedd proved faithless. She took a lover, Gronw Pebyr, and the pair plotted to kill Lleu. Blodeuwedd tricked Lleu into revealing the only circumstances under which he could be killed, and then she placed him in the perfect position, leaving Gronw to strike the final blow. But as the spear pierced him, Lleu turned into an eagle. He was restored to human form by Gwydion, then found Gronw and killed him. As punishment for her part, Gwydion turned Blodeuwedd into an owl.

Tuesday, 17 December 2019

A Fateful Mission in the Bermuda Triangle

This is the real story of A Fateful Mission in the Bermuda Triangle. When At 2:10 p.m. on December 5, 1945, five Avenger torpedo bombers roared off the runway of the Fort Lauderdale Naval Air Station. Flight instructor Lieutenant Charles G. Taylor was leading thirteen crewmen of Flight 19 on a routine navigational training exercise. But ominously the course lay over an area bounded approximately by Bermuda, Florida, and Puerto Rico, in what is now known as Bermuda Triangle, where so many ships and aircraft have met mysterious fates.
Flight 19 began smoothly enough But at 3:40 p.m., an unsettling message from Taylor to another plane in his squadron was intercepted by Lieutenant Robert Cox, who was airborne over Fort Lauderdale on another exercise. "What is your trouble?" Cox asked Taylor. "Both my compasses are out, and I am trying to find Fort Lauderdale," Taylor replied.
For the next forty-five minutes, Cox tried to ascertain Taylor's position and direct him to land by orienting him toward the sun, but although it was a clear day, Taylor seemed unable to find it. Finally, Taylor's transmission faded until it stopped. Then, inexplicably, Cox's radio went dead, too. He returned to the field at Fort Lauderdale.
The ground station at Port Everglades had meanwhile established intermittent contact with the troubled Flight 19, confirming Cox's observations. Finally, at about a quarter past five, the ground station heard a forlorn message from Flight 19; "We'll fly west until we hit the beach or run out of gas. The authorities at Fort Lauderdale ordered an immediate search, and before long a Mariner flying boat was in the air with another thirteen crewmen. But the Mariner was not heard from again.
For the next five days, other search planes flew more than 930 sorties over the area. But not a a scrap of wreckage from either the Avengers or the Mariner was ever recovered. Most analysts blame this and other disappearances that have occurred in the area on the normal hazards of the sea and air. But students of the occult blame the disaster on the malevolent powers said to flourish in the Bermuda Triangle. This mission in the Bermuda Triangle is never found anywhere else in the books. 
Read More – Golden Chains of Laburnum / The Snapping Turtles (Chelydra serpentina)
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Tuesday, 3 December 2019

The Mystery of UtsuroBune?

In the year 1803, many fishermen in Hitachi province on the eastern coast of Japan reported seeing a strange vessel wash up onshore. They described the vessel as circular, hollow, and made of metal and glass, with cryptic symbols inscribed on its hull. From the bizarre craft emerged a beautiful woman clad in the clothing of a style and material unrecognizable to the local villagers who had gathered on the beach.
In her hands, the mysterious woman clutched a small box, which she would not allow anyone to touch. She could not speak Japanese or any other identifiable language. Various historical illustrations of the UtsuroBune story depict the same set of symbols etched in the ship’s hull. And fascinatingly, though separated by two hundred years and several oceans, the strange shapes on the craft are eerily like those described by Sergeant Jim Penniston in Rendlesham Forest.
Could the shared symbology point to an extraterrestrial alphabet? Is it possible for the UtsuroBune and the Rendlesham Forest craft traveled from the same otherworldly origin? And what does it mean that the UtsuroBune washed ashore near the Dragon’s Triangle, also called the Devil’s Sea? An area of the Pacific Ocean in which more than eight hundred ships have allegedly disappeared?
More and more government and military officials who have been involved with the UFO phenomenon are coming forward and speaking out. Indeed, some governments around the world are opening their UFO files. There’s a kind of quickening of the pace here. It’s like we’re building up to something, and if there is a great secret to be discovered, the disclosure movement is doing its part and keeping interested focused on this fascinating mystery.
It was far too interesting and important just to walk away. Hence, the questions of, Are we alone or not in the universe? Are we being visited? These are really the biggest and most profound questions we can ask ourselves. That’s why many investigators involved with it and why they were so passionate about it. Read More - Stefan Michalak Faces UFO Near Falcon Lake, Canada

Sunday, 17 November 2019

Who Invented the Helicopter?


The long time dream of humans to flying machine that would be rise straight up in an old one! It is believed that Leonardo da Vinci made drawings for a gigantic screw like helicopter about A.D. 1500. Da Vinci never tried to build one because he had no motor to drive it.

Who Invented the Helicopter? So, it is unclear and no one knows where it came from but a toy helicopter known as “the Chinese top” was shown in France in 1783. However, in 1796, Sir George Cayley made experimental forms of Chinese tops and also designed a steam driven helicopter.

For the next 100 years, a number of people made designs for helicopters. Some were fantastic, other almost practical, and a few of them actually flew. But there were no powerful, lightweight engines. It was not until such engines were made during World War I that anyone made a helicopter that got off the ground with a man aboard.

In 1906, two French brother Jacques and Louis Breguet made a successful experiment of Gyroplane No. 1. That machine lifted its pilot into the air about 0.6 meters (2 ft) for a minute. Igor Sikorsky built two helicopters or chopper in 1909 and 1910. One of them actually lifted its own weight. Towards the end of year 1917, two Austro-Hungarian officers built a helicopter to take the place of observation balloons.

It made a number of flights to high altitudes but was never allowed to fly freely. Therefore, work on helicopter continued in many countries but none of the machines were what the inventors had hoped for. In 1936, an statement came from Germany that the Focke-Wulf Company had built a successful helicopter.

However, in 1937 it flew cross country at speeds close to 70 miles an hour and went up more than 335 meters. In 1940, Sikorsky showed his first practical helicopter and it was delivered to the United States Army in 1942. Silkorsky design was called the VS-300. Soon after, Helicopter was used in military campaign. Source: Charismatic Planet




Sunday, 10 November 2019

Exocoetidae and Other Flying Fishes

How do the members of Exocoetidae compare to other flyers? Researchers traditionally group flying fish with all the other vertebrate gliders:
“flying” frogs with their expanded webbing on the front and hind feet.
Draco, the flying “dragon,” with a flight surface formed from elongated ribs, ‘‘flying” geckos, warm weather lizards.
“flying” snake that can turn its body into a flight surface by forming a depression on its underside by drawing in its skin while the body is coiled into a triangular-shaped plane.
Mammalian gliders-flying squirrels, marsupial sugar gliders, and the colugo or ‘‘flying lemur”- in which the flight surface is a fur-covered membrane stretched out between the legs and the body. Despite the superficial distinction of gliding, wing design, and flight performance differ sharply between flying fish and other vertebrate gliders.
Other gliders are restricted mainly to trees. They fly by descending from a position in the trees higher than where they will be at the end of their glide. Their flight surfaces are more like parachutes than wings. The very low aspect ratios of such flight surface slow the animals’ rate of descent while preventing the onset of stall. The glide path is very steep. Flying fish have a shallow glide path at high speed. They begin and end their flight at the same level. performance characteristics that resemble those of flapping flyers, such as birds and bats.
Wing shapes and glide ratios are remarkably similar between the two groups. But flying fish do not have adaptations for lightening the body-like pneumatic bones and air sacs-as birds do. To function underwater, the fish required a body density close to that of water for buoyancy and stability. They required and takes precedence over the advantages in the flight of a lower-body density. As a result, the wing loading is higher for flying fish than for birds.
Flying fish must glide faster than birds to keep the same rate of sink and to prevent the onset of stall. The machine, flying fish are inseparably linked to the physical constraints of wind and gravity. Notwithstanding these limitations, flying fish have aerodynamic designs that give them greater gliding proficiency in seeming effortless flight. We must marvel at how a fish out of water can perform so elegantly.

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Reference - Frank Fish (Professor of Biology at West Chester University of Pennsylvania.