In addition, the Education feat from Eberron Campaign Setting or the Well Read feat from Dragon vol. 315 can get you all Knowledge skills in-class, regardless of class. Keeper of Forbidden Lore from Fiendish Codex I: Hordes of the Abyss can get you Knowledge (the planes), but not Knowledge (arcana).2 Ultimately, spending a feat to save six skill points is a terrible trade, but if you really wanted to the options exist.
In ROUNDERHOUSE's Jade Proposal, the Daevites practiced animancy, the magic over life and spirits, as they believed that anything had a soul, but what differentiated them was their presence either in the astral or material plane. They were more proficient in herbomancy because the Daevas were regarded as nature spirits, but they were capable of much more than creating monstrous plants or agriculture. In fact the Daevites had their university of kallya comprised of scholars who would be compared to modern day alchemists. The university was capable of creating many-legged beasts of burden and highly dangerous viral bioweapons which were loaded into glass jars and catapulted into enemy cities. The Daevites could achieve this through the bonding of the Daeva and a human caster, although slaves would also be sacrificed for their magic rituals. The Daeva required human hosts as they alone were unable to walk the material world and were forced to remain in the astral plane. The current Rajmata was capable of carrying the one soul that previously inhabited the previous Rajmatas, allowing her to commune with her predecessors. Their magical power was considered mundane as it was used for various everyday tasks such as pheromone-based hypnotics for controlling slaves, accelerated tree growth into the desired structures and bonding Daevas to soldiers for war. The Daevas also had "The Song of the Daeva" which spoke about their history and reinforced Korar's existence.
Energy in fluid is contained in four different forms: gravitational potential energy, thermodynamic pressure, kinetic energy from the velocity and finally thermal energy. Gravitational and thermal energy have a negligible effect on the energy extraction process. From a macroscopic point of view, the air flow around the wind turbine is at atmospheric pressure. If pressure is constant then only kinetic energy is extracted. However up close near the rotor itself the air velocity is constant as it passes through the rotor plane. This is because of conservation of mass: the air that passes through the rotor cannot slow down because it needs to stay out of the way of the air behind it. So at the rotor the energy is extracted by a pressure drop. The air directly behind the wind turbine is at sub-atmospheric pressure; the air in front is at greater than atmospheric pressure. It is this high pressure in front of the wind turbine that deflects some of the upstream air around the turbine.
This limit is derived by looking at the axial momentum of the air passing through the wind turbine. As stated above, some of the air is deflected away from the turbine. This causes the air passing through the rotor plane to have a smaller velocity than the free stream velocity. The ratio of this reduction to that of the air velocity far away from the wind turbine is called the axial induction factor. It is defined as
This loss is minimized by allowing the rotor to rotate very quickly. To the observer it may seem like the rotor is not moving fast; however, it is common for the tips to be moving through the air at 8-10 times the speed of the free stream. Newtonian mechanics defines power as torque multiplied by the rotational speed. The same amount of power can be extracted by allowing the rotor to rotate faster and produce less torque. Less torque means that there is less wake rotation. Less wake rotation means there is more energy available to extract. However, very high tip speeds also increase the drag on the blades, decreasing power production. Balancing these factors is what leads to most modern horizontal-axis wind turbines running at a tip speed ratio around 9. In addition, wind turbines usually limit the tip speed to around 80-90m/s due to leading edge erosion and high noise levels. At wind speeds above about 10m/s (where a turbine running a tip speed ratio of 9 would reach 90m/s tip speed), turbines usually do not continue to increase rotational speed for this reason, which slightly reduces efficiency.
Jetboy was the world's greatest pilot and a great American hero of World War II. He was the first man to pilot a jet plane, the legendary JB-1 experimental aeroplane. He heroically sacrificed his life trying to stop the release of the wild card virus in 1946. He failed, but his death marked the beginning of the age of the wild card and turned him into a legend. Jetboy is in many ways a tragic figure, a battle-scarred veteran of only 19 years of age by the time he died. He is the subject of countless movies and books. The JFK Airport in the Wild Cards universe is named the Tomlin International Airport instead.
Robert Tomlin was born circa 1926, and was raised in an orphanage. He had always been obsessed with aeroplanes and flying. In 1939, when he was only 12-years old, Bobby escaped the orphanage to go work at Bonham's Flying Service, in New Jersey. There Bobby met Professor Silverberg, a brilliant but eccentric aeronautical scientist that would become his mentor, and Linc Traynor, a mechanic that would become his best friend. When Silverberg built the JB-1, the first ever jet plane, Bobby was the first man to pilot it. But soon afterwards, Nazi spies came after Silverberg and the plane. The Nazis ended up killing Professor Silverberg, and Robert used the JB-1 to gun them down, avenging the death of his mentor.
At that time, the US still hadn't entered World War II. So Bobby fled to Canada and joined the Royal Canadian Air Force, unofficially. He was only 13-years old. Bobby went to England and fought in the Battle of Britain, later he fought the Japanese alongside the Flying Tigers, and came back to England when America finally entered the war in 1941. Always piloting his distinctive jet plane, Bobby became worldwide famous and was nicknamed Jetboy by an awestruck press. He was by far the greatest ace of the war, shooting down about 500 enemy planes and 50 ships. There was even a comic book, Jetboy Comics, narrating fictionalized versions of his adventures. At the height of his popularity, the comic was selling half a million copies a month.
A monument was built in Jetboy's homage overlooking the Hudson River, covering the area where the pieces of his plane had fallen. Jetboy's Tomb, it's a major tourist attraction in New York City. Many books and movies were produced about Jetboy's life. Among them is Godot Is My Co-Pilot, a novel by Daniel Deck, and two versions of Thirty Minutes Over Broadway, a movie dramatizing Jetboy's final adventure.
Jetboy had no superhuman powers, but he was the world's most talented pilot. His skill with aeroplanes was innate; he never took flying lessons, he simply always knew how to fly. In aerial battle he was deadly, with impressive reflexes and aim. In addition to his piloting skills, Jetboy was a competent mechanic and navigator. His knowledge of aviation history was also remarkable.
Jetboy's defining trait was his love of aeroplanes and flying. It gave direction to his life, making him what he was. Jetboy only felt truly alive when he was flying on some dangerous mission. He had the bravery of the true hero. Despite his youth and lack of formal schooling, Jetboy was intelligent, resourceful, even cynical at times. This cynicism could quickly devolve into bitterness when he was in a bad mood. Such was often the case when he faced difficulty in adapting to civilian life. When he came back from the war, Jetboy felt like life had passed him by and that he had no place in the postwar society. He was basically a lonely man. He pathetically tried to adapt to peace time by watching movies, sometimes watching six or eight movies a day. Jetboy seemed to be inexperienced with women, and probably died a virgin.
Launched as an original Image comic book title by hugely popular penciler X-Men penciler Jim Lee and his friend writer Brandon Choi, the comic book's premise revolved around the centuries long war between aliens called Kherubim and Daemonites. Kherubims, a nearly immortal, human-looking alien race with exceptional powers and skills, eventually travelled to Earth and by breeding with humans populated the planet with "Half-Breeds". Daemonites, on the other hand, were introduced as a more savage race with a less humanoid form. They resemble the creatures who fought with Ellen Ripley in the cult sci-fi hit movie Aliens. Daemonites, besides having a fearsome appearance, also possessed various superhuman abilities including body possession and mental control over human beings. The initial arc brought Voodoo over to the team as the readers' point of view character as Helspont, a Daemonite warlord has taken control over Vice President of the United States Dan Quayle. Rob Liefeld's Youngblood co-starred in the closing chapters of the arc.
Appearances were deceiving, however, and it was apparent the planet was run by power-hungry politicians who have ruthlessly subjugated the Daemonites and the planets original inhabitants related to Maul the Titanothropes as second-class citizens. Voodoo, with her Daemonite blood, experienced this firsthand. And though Emp, Warblade and Zealot were seduced by promises of power and recognition, Spartan discovered the truth about Khera's corrupt leaders. It took the death of one of Maul's race for the WildC.A.Ts to leave and head back for Earth. Disillusioned by the outcome of the war offworld and their selfishness, the team fell apart. Voodoo left and Emp fell into depression. The original team returned to Earth in pieces and despite having new members, they were defeated by the cunning traitor, Tao, who had manipulated them at each turn. Alan Moore also participated in Fire from heaven, a huge continuity heavy crossover that resolved plotlines regarding Team 1, Team 7 and Kaizen Gammora, also being the last time for several years the WildStorm universe felt like a coherent whole.
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