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The first known lawn mower had a cylinder cutting gear made of iron. [citation needed] It was used to mow sporting grounds and wide-ranging gardens.As manufacturers changed the design and structure of mowers, the cutting mechanism also developed and evolved into several varieties, including cylinder/reel blades, deck blades, mulching blades, and lifting blades.
A John Deere Gator converted into an ambulance: This vehicle is owned by Toronto District St. John Ambulance. The John Deere Gator is a family of small all-terrain utility vehicles produced by the John Deere Corporation. Gators typically feature a box bed, similar in function to a pickup truck. The bed can also be installed as an electric dump ...
Blade flapping is the primary means of countering dissymmetry of lift. [1]: 2–14 Rotor blades are designed to flap: the advancing blade flaps up and develops a smaller angle of attack due to a change in relative wind vectors, thus producing less lift than a rigid blade would. Conversely, the retreating blade flaps down, develops a higher ...
In this mode of operation the craft is essentially identical to a helicopter. As the craft gains speed, the coaxial proprotor is slowly tilted forward, with the blades eventually becoming perpendicular to the ground. In this mode the wing provides the lift, and the wing's greater efficiency helps the tiltrotor achieve its high speed.
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