blade tip वाक्य
उदाहरण वाक्य
मोबाइल
- By using overlarge propeller blades there is no need to have the blade tip reach near the speed of sound, and the RPM can therefore be reduced without sacrificing thrust.
- The " navaja bandolera " is a variation of what is termed a " clip point " blade, a design featuring a concave unsharpened false edge near the blade tip.
- In typical turbo machinery, the clearance between blade tips and the casing must account for thermal and inertial expansion as well as changes in concentricity due to shock loading events.
- Usual towers of multi megawatt turbines have a height of 70m to 120m and in extremes up to 160m, with blade tip speeds reaching 80 m / s to 90 m / s.
- The structures would stretch 417 feet high from the water's surface to the tallest blade tip and would be visible 4 miles away on Cape Cod and more distantly from Martha's Vineyard and Nantucket.
- Here's a typical example : 33m diameter, 50 rpm gives a blade tip speed of 125 m / s, far below the speed of sound in air ( about 346 m / s ).
- But the presence of all of the propeller blade tips at the crash site suggested that the blades had not broken in mid-air, as has happened in some previous accidents involving this model turboprop.
- Simply making the blades longer would create the desired lift but you run into the following problem : as the diameter of the rotor increases the blade tip speed increases ( at a given RPM ).
- It is possible to increase the diameter of the blades to increase the blade area, but eventually the blade tip will approach the speed of sound so then an extra blade and reduced diameter are necessary.
- The tapered blade tip sweeps back and angles downward to reduce noise and increase lift . Tethered hover flight has recorded 138 kN ( 31, 000 lbf ) of lift generated, both in and out of ground effect.
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