of times their size. There are many factors that contribute to the hummingbirds ’ ability to fly so easily through the air. A hummingbird ’s wings are shaped so that they are slightly rounded on the top. "Their wings flaps 15-80 times per second‚ depending on the type of species they are. The Giant Hummingbird ’s wings beat 8-10 beats per second‚ the wings of medium size hummingbirds beat 20-25 beats per second and the smallest beat 70 beats per second."< http://en.wikipedia.org/wiki/Hummingbirds>
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DRDO Science Spectrum‚ March 2009‚ pp. 4-11 DRDO SCIENCE SPECTRUM 2009 © 2009‚ DESIDOC Aircraft Performance Improvements-A Practical Approach S.K. Jebakumar Centre for Military Airworthiness and Certification‚ Marathalli Colony‚ Bangaluru- 560 037 ABSTRACT An aircraft is designed based on various wind tunnel testing‚ computational analysis‚ previous design experience etc. In most of the aircraft programs the design objective could not be met with the first prototype design itself. Before the
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weight. Thrust is the force that propels the object forward. For every action there is an equal but opposite reaction‚ therefore the force opposite of thrust is drag. The main forms of drag are pressure‚ and friction drag. Aerodynamics‚ engines‚ wings and flaps are the main factors that affect an aircraft’s ability to fly. Weight is a force that is always directed towards the earth‚ vertically‚ through the planes center of gravity. An airplanes mass would be the weight of all its parts‚ plus
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Another extremely important design factor is adding dihedral and maybe even polyhedral to the glider’s wings. This allows the plane to “naturally” stabilize itself. Dihedral is the upward angle of the wings on a plane and polyhedral is upward angle further down the wings. I’m going to put dihedral and polyhedral however‚ together they both will add up to an angle of 8 degrees which I believe would be an overall good angle. The reason
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extended. Aircraft of all types and sizes are flying with winglets -- from single-seat hang gliders and ultralights to global jumbo jets. Some aircraft are designed and manufactured with sleek upturned winglets that blend smoothly into the outer wing sections. Add-on winglets are also custom made for many types of aircraft. The concept of winglets originated with a British aerodynamicist in the late 1800s‚ but the idea remained on the drawing board until rekindled in the early 1970s by Dr. Richard
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for flight. She loved the bird immensely‚ it meant everything to her. Then‚ one day‚ while flying around the house‚ the bird hit a window‚ breaking its wing. The owner rushed to the vet‚ but the damage was irreparable. Now‚ because the owner was unable to care for a flighted bird‚ it can never fly again. Choosing whether or not to clip a bird’s wings is one of the greatest and most fiercely argued bird owner controversies.
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Wind Beneath My Wings By Better Midler is one of the songs that was chosen for the project theme. It also relates to any relationship It’s about a couple trying to say thank you for always being there and supporting each other through any hardship and obstacles that hit you in life. The emotions that was giving off is happiness because the person is thanking the other always being there and helping each other. The meaning behind the song is a bird cannot fly to great heights without wind. When someone
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Paul Laurence Dunbar was an African American poet of the late 19th and early 20th centuries who lived through slavery‚ racism and segregation. So this poem is considered to be an extended metaphor where through out the entire poem Dunbar is comparing himself and all African Americans at that time with a caged bird that does not have the freedom to enjoy the nature and does not have the freedom to fly like all other birds meaning white people at that time. The poet starts the poem with a sentence
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Paul Laurence Dunbar was an African American poet of the late 19th and early 20th centuries who lived through slavery‚ racism and segregation. So this poem is considered to be an extended metaphor where through out the entire poem Dunbar is comparing himself and all African Americans at that time with a caged bird that does not have the freedom to enjoy the nature and does not have the freedom to fly like all other birds meaning white people at that time. The poet starts the poem with a sentence
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Please fasten your seat belt sir.” The voice of the flight steward woke me back from my reverie. After what seemed like thousands of years‚ finally I was taking a long break from my official and marital stress. I just couldn’t stop day dreaming about how perfect my vacation in Hawaii would be! As my flight took off‚ the excitement grew even further to feel the warm‚ sandy beaches sparkling in the sun‚ the sweet smelling pine trees and the luscious aroma of Pena Coladas‚ which would be welcoming me
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