SKU: 8775922812

Helicopter Theory

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Description

Helicopter TheoryThe history of the helicopter may be traced back to the Chinese flying top (c. 400 B. C.) and to the work of Leonardo da Vinci, who sketched designs for a vertical flight machine utilizing a screw type propeller. In the late nineteenth century, Thomas Edison experimented with helicopter models, realizing that no such machine would be able to fly until the development of a sufficiently lightweight engine. When the internal combustion gasoline engine

The history of the helicopter may be traced back to the Chinese flying top (c. 400 B.C.) and to the work of Leonardo da Vinci, who sketched designs for a vertical flight machine utilizing a screw-type propeller. In the late nineteenth century, Thomas Edison experimented with helicopter models, realizing that no such machine would be able to fly until the development of a sufficiently lightweight engine. When the internal combustion gasoline engine came on the scene around 1900, the stage was set for the real development of helicopter technology.
While this text provides a concise history of helicopter development, its true purpose is to provide the engineering analysis required to design a highly successful rotorcraft. Toward that end the book offers thorough, comprehensive coverage of the theory of helicopter flight: the elements of vertical flight, forward flight, performance, design, mathematics of rotating systems, rotary wing dynamics and aerodynamics, aeroelasticity, stability and control, stall, noise and more.
Wayne Johnson has worked for the U.S. Army and NASA at the Ames Research Center in California. Through his company Johnson Aeronautics, he is engaged in the development of software that is used throughout the world for the analysis of rotorcraft. In this book, Dr. Johnson has compiled a monumental resource that is essential reading for any student or aeronautical engineer interested in the design and development of vertical-flight aircraft.



Binding Type: Paperback
Publisher: Dover Publications
Published: 10/06/1994
ISBN: 9780486682303
Pages: 1120
Weight: 2.44lbs
Size: 8.22h x 5.62w x 2.00d
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SKU: 8775922812

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RHayward
Carnegie, US
★★★★★ 5
Perfect size and very durable! Flexible but sturdy.
Perfect for my Frenchton puppy. Easy to pick up in her mouth and they are flexible but sturdy. Unfortunately lost all three already, lol, so guess I’ll be buying more. 🤦‍♀️
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Reviewed in the United States on October 16, 2025
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Wanda Blackwell
Lowell, US
★★★★★ 5
Great product
My Cookie loves these she plays with them everyday.
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Reviewed in the United States on February 19, 2026
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Paula D.
Lexington, US
★★★★★ 4
More like a cat toy size ball. Still a good toy.
I should have paid more attention to the size as they are slightly bigger than golf balls. The ones I was looking for are identical but about the size of a grapefruit. My dachshund has one and it is her favorite ball toy. That's on me though. These are more of a cat toy size ball. These do look like they are the same material as my pups larger one which is durable and fun for her to throw and bounce. The holes make it easy for the pups to grab and run quickly or catch in mid-air. I'm not sure how other small dogs would do but these are too small to play tug-of-war with my little girl and she is definitely not as interested in them as she is with her bigger one. I think we will donate these to animal control since I am sure they have some small dogs or cats that would appreciate these more than our picky girl lol. Still a great toy but just not the size she likes.
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Reviewed in the United States on December 20, 2025
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Rob
Chelsea, US
★★★★★ 5
Nice, long lasting balls.
My dog is not an aggressive chewer and solely just wants to play fetch. As a small 8lbs dog, this is the perfect size for her. Typically these will dry rot after a few years of use. We do buy these so it’s a little bit less destructive while throwing a ball inside the house.
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Reviewed in the United States on May 23, 2026
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BPlatt
Lexington, US
★★★★★ 5
My corgis love these!
Perfect for corgi puppies. I always buy this brand for my corgis. It’s perfect for them and I don’t have to worry about broken teeth.
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Reviewed in the United States on January 8, 2026

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