 ... multiplying it by the sectional area. The most convenient instrument for such measurements of velocity is a small light revolving fan, on whose axis there is a screw, which drives a train of wheel work, carrying indexes that record the number of revolutions...  A Manual of Civil Engineering - الصفحة 699بواسطة William John Macquorn Rankine - 1872 - عدد الصفحات: 784عرض كامل - لمحة عن هذا الكتاب
 | Henry Woodward - 1869 - عدد الصفحات: 646
...screw, which drives a train of wheel-work, carrying an index that records the number of revolutions in a given time. The whole apparatus is fixed at the...immersed to different depths in different parts of the stream." ' Whence the mean velocity can. be obtained. "With regard to the rate at which the materials... | |
 | William John Macquorn Rankine - 1866 - عدد الصفحات: 624
...the number of revolutions made in a given time. The whole apparatus is fixed at the end of a polo, so that it can be immersed to different depths in...noting the revolutions of the fan in a given time. II. When from the want of the proper instrument, or any other cause, the velocity of the current cannot... | |
 | Henry Woodward - 1869 - عدد الصفحات: 664
...screw, which drives a train of wheel-work, carrying an index that records- the number of revolutions in a given time. The whole apparatus is fixed at the...immersed to different depths in different parts of the stream." ' Whence the mean velocity can be obtained. With regard to the rate at which the materials... | |
 | William John Macquorn Rankine - 1870 - عدد الصفحات: 638
...is a small light revolving fan, on whose axis there is a screw, which drives a train of wheel work, carrying indexes that record the number of revolutions...pole, so that it can be immersed to different depths iii different parts of the channel The relation between the number of revolutions of the fan per minute,... | |
 | William John Macquorn Rankine - 1878 - عدد الصفحات: 746
...is a small light revolving fan, on whose axis there is a screw, which drives a train of wheel work, carrying indexes that record the number of revolutions...current, should be determined experimentally, by moving theinstrument with different known velocities through a piece of still water, and noting the revolutions... | |
 | William John Macquorn Rankine - 1888 - عدد الصفحات: 696
...carrying indexes that record the number of revolutions made in a given time. The whole apparatus is tixed at the end of a pole, so that it can be immersed to different depths iu different parts of the channel. The relation between the number of revolutions of the fan per minute,... | |
 | Charles Herbert Innes - 1898 - عدد الصفحات: 260
...revolutions. To graduate the instrument it must be drawn through still water at known velocities. It is fixed at the end of a pole, so that it can be placed at different depths in the stream whose velocity is to be measured. CHAPTER III. FORM ASSUMED... | |
 | Charles Herbert Innes - 1901 - عدد الصفحات: 322
...revolutions. To graduate the instrument it must be drawn through still water at known velocities. It is fixed at the end of a pole, so that it can be placed at different depths in the stream whose velocity is to be measured. CHAPTER lit. FORM ASSUMED... | |
 | William John Macquorn Rankine - 1906 - عدد الصفحات: 766
...is a small light revolving fan, on whose axis there is a screw, which drives a train of wheel work, carrying indexes that record the number of revolutions...experimentally, by moving the instrument with different known veloo ties through a piece of still water, and noting the revolutions of the fan in a given time. II.... | |
 | United States. Army. Corps of Engineers - 1876 - عدد الصفحات: 852
...train of wheel-work, carrying indexes that record the number of revolutions made in a given time. The apparatus is fixed at the end of a pole, so that it...minute, and the corresponding velocity of the current, was ascertained by numerous trials in still water with a skirt' rowed at various rates of speed. The... | |
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