. Comparative test of cylinder lubricating oils . r minute. 1. 9:28 87 90 90 2:12 6 2. 9:41 87 90 90 6 3. 9:58 87 90 90 6 4. 10:15 87 90 90 6 5. 10:25 87 2. 90 6 Data on pure tallow oil. & Ilay 23,1907. 1. 11:40 87 90 90 6 2. 11:48 87 90 90 6 3. 11:54 67 90 90 6 CHAET3. Data on Ft. l^earborn XX Cylinder Oil. ;?: oil. 1. 10:35 87 100 95 6 2. 10:40 87 100 95 6 3. 10:45 87 100 95 1:94 6 4. 10:50 87 100 95 6 5. 10:55 87 100 95 6 6. 11:00 87 100 95 6 7. 11:05 87 100 9 5 6 8. 11:10 87 100 95
. Comparative test of cylinder lubricating oils . r minute. 1. 9:28 87 90 90 2:12 6 2. 9:41 87 90 90 6 3. 9:58 87 90 90 6 4. 10:15 87 90 90 6 5. 10:25 87 2. 90 6 Data on pure tallow oil. & Ilay 23,1907. 1. 11:40 87 90 90 6 2. 11:48 87 90 90 6 3. 11:54 67 90 90 6 CHAET3. Data on Ft. l^earborn XX Cylinder Oil. ;?: oil. 1. 10:35 87 100 95 6 2. 10:40 87 100 95 6 3. 10:45 87 100 95 1:94 6 4. 10:50 87 100 95 6 5. 10:55 87 100 95 6 6. 11:00 87 100 95 6 7. 11:05 87 100 9 5 6 8. 11:10 87 100 95 6 9. 11:15 87 100 95 6 .0. 11:25 87 100 95 6 .1. 11:30 87 100 95 6 CHART 4. Data on Capital Cylinder Oil. (Compounded mineral oil recommended for high ptes.) ard Time. SteamMain. PreCyl Area in. Drops perminute. 1. 10:08 87 95 95 6 2. 10:13 87 90 90 6 3. 10:18 87 85 85 6 4. 87 85 85 6 5. 10:35 87 85 85 6 6. 10:50 87 85 85 6 7. 11:00 87 85 85 6. It will be seen from the set of six cards,showing theeffect of increasing the speed,that the inertia forees distortthe cards and give fictitious results. These cards were takenwith .team in the cylinder,but no lubricant, fhe increased speedshov/s little effect upon the area of the cards until a speed of135 revolutions per minute is reached. At sixty-three revolutionsper minute,the lines are straight and the curves due toinertia forces are a niniEiun. ¥/ith increased speed,the cards be-come more wavy and less reliable. There is an error in integrating these cards as awork diagrain,because the area s under the loops at each end ofthe card 4re due to inertia forces,and not to friction. The idealcard v/ould be a rectangle. If the cards v/ere made up of perfectlystraight parallel lines,the width of the card could be taken asproportional to the v/ork done. The spring used was an 80 poundspring from a Thompson indicator,liaving a scale o
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