History

It is astonishing that, after the development of the power driven airplane, and the realization of the impossibility of flying by means of human muscular power, we should have at last succeeded in constructing flying gliders, which without any expenditure of muscular energy are able to remain aloft under most weather conditions for long periods, and even actually to travel at a reasonable speed towards a desired objective. BOOK (3) SOURCE: New Master Pictorial Encyclopedia

History

The first suggestion of flight by means of apparatus lighter from air came from De Lana, who in 1670 suggested that a vessel exhausted of air, if itself light enough, would rise in the air. We know today that no material exist by means of which this idea could be realized, since the pressure would crush any material known. About the same time the line of attack through gliding began to be realized, and experiments in this direction and that of flapping wings probably never ceased. People were always attaching some kinds of wings to themselves and jumping off Church's tower and other elevated points, frequently having the luck to escape serious injury. Sir George Calley (1773-1857), an eminent English Mathematician, turn his attention seriously to the whole problem. He finally rejected the idea of the ' unhoped,' i.e, of flight human muscular power through flapping wings, and actually suggested that the final solution would come from an explosion engine, which for the year 1809 was the remarkable manifestation of prophetic genius. In the meantime there was the ascents of Montgolfier's balloon in 1873, fallowed by the first human ascent of Pilatre de Rozier in the same year. In the following year, Tytler ascended in a hydrogen balloon of Edinburgh, the first human being to navigate the air over Br.soil. BOOK (2) Source: New Master Pictorial Encyclopedia.

History

The word aircraft is commonly used to designate any type weight-carrying structure for navigation of the air, supported either by buoyancy or by the dynamic action of air against its surface. The idea of flying probably dates from the time when mankind first began possibilities of progress. The legend of Daedalus and Icarus, and the Eastern fables of flying horses and carpets certainly go back several hundred years B.C. It was natural that these legends should lead to continued efforts,most of them probably forgotten, to make wings and use them as a bird does. It is characteristic of the modern age that the brothers Lilienthal, in 1861, started experimenting, by night for fear of ridicule, with a view to making birdlike wings for themselves; but Otto soon realized that patient scientific investigation would be necessary,and so became, through his experiments with gliders, one of the true pioneers of aviation; he was killed in a gliding accident. Leonardo da Vinci, the true father of the modern mechanical age, projected all kinds of machines which have since been realized, but though he was the first to suggest the air-screw, he failed to realize both its association with the lifting plane, and the probability that man's muscular power would never succeed in lifting him from the earth. BOOK (1) SOURCE New Master Pictorial Encyclopedia.

environmental issue to understand

" All Filipinos should do their share to fight global warming," that is Sec. of the Department of Natural Resources called on to the people, " or else the country will not be able to move forward to achieve sustainable development and clean environment.
Thus, Secretary added, all Filipino's must understand environmental issues so they can act for themselves intelligently and take part in social mobilization for change.
lately, he said, the world has come to the realization that social change and sustainable development are intimately related, a fact whose proof is provided by the phenomenon of global warming that is blamed on man's abuse of the environment and whose negative impact is felt through changes in occurrences like natural disasters.

The real source of my Strength

" I am very pleased with the design that was done by the Philately Division of the Philpost." Pacquiao quoted. The design was personally handpicked by the world champion before he left the country to prepare for his upcoming fight, his boxing match with reigning WBC lightweight champion David Diaz on June 28. The champ approved the final design when it was sent to him by his manager Eric Pineda and in a humble way of saying " I am deeply honored by this stamp, i promise that i will do my best every time i am fighting. The Filipino people are the real source of my strength. My utmost intention is to unite the Filipinos through my efforts in boxing," This special stamps will be on sale in June. The Philippine Postal Corporation is now in the process of printing the regular and the special limited edition of the Pacquiao stamps.