Experimental Mechanics a Course of Lectures Delivered At the Royal College of
Experimental Mechanics a Course of Lectures Delivered At the Royal College of
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In other words, only 40 per cent, of the applied energy is utilized.
226. An extended series of experiments upon the epicycloidal pulley-block is recorded in Table XII.
Ii8 EXPERIMENTAL MECHANICS. [LECT. Vii.
TABLE XII. THE EPICYCLOIDAL PULLEY-BLOCK.
Size adapted for lifting weights up to 5 cwt. ; velocity ratio 12-5 ; mechanical efficiency 5 ; useful effect 40 per cent. ; calculated formula P = 5-8 + 0-185 # Number of Experiment.
R.
Loads in Ibs.
Observed power in Ibs.
P. Calculated power in I...bs.
Difference of the observed and calculated values.
I 56 '5 16-2 + 1-2 2 112 27 26-5 ~ '5 3 168 40 - 3'i 4 224 47 47 -2 + O'2 280 56 57-6 + 1-6 6 336 66 680 + 2'O 7 392 78 78-3 + O*3 8 448 88 88-6 + o'6 9 504 100 99-0 - I'D 10 560 IIO 109-4 -0-6 The fourth column shows the calculated values of the powers derived from the formula. It will be seen by the last column that the formula represents the experiments with but little error.
227. Since 60 per cent, of energy is consumed by friction, this machine, like the differential pulley-block, sustains its load when the chains are free.
What to read after Experimental Mechanics a Course of Lectures Delivered At the Royal College of?
You can find similar books in the "Read Also" column, or choose other free books by Robert S Robert Stawell Ball to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In other words, only 40 per cent, of the applied energy is utilized.
226. An extended series of experiments upon the epicycloidal pulley-block is recorded in Table XII.
Ii8 EXPERIMENTAL MECHANICS. [LECT. Vii.
TABLE XII. THE EPICYCLOIDAL PULLEY-BLOCK.
Size adapted for lifting weights up to 5 cwt. ; velocity ratio 12-5 ; mechanical efficiency 5 ; useful effect 40 per cent. ; calculated formula P = 5-8 + 0-185 # Number of Experiment.
R.
Loads in Ibs.
Observed power in Ibs.
P. Calculated power in I...bs.
Difference of the observed and calculated values.
I 56 '5 16-2 + 1-2 2 112 27 26-5 ~ '5 3 168 40 - 3'i 4 224 47 47 -2 + O'2 280 56 57-6 + 1-6 6 336 66 680 + 2'O 7 392 78 78-3 + O*3 8 448 88 88-6 + o'6 9 504 100 99-0 - I'D 10 560 IIO 109-4 -0-6 The fourth column shows the calculated values of the powers derived from the formula. It will be seen by the last column that the formula represents the experiments with but little error.
227. Since 60 per cent, of energy is consumed by friction, this machine, like the differential pulley-block, sustains its load when the chains are free.
What to read after Experimental Mechanics a Course of Lectures Delivered At the Royal College of?
You can find similar books in the "Read Also" column, or choose other free books by Robert S Robert Stawell Ball to read onlineMoreLess
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