This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...efficiency of the reduction gear. Fig. 28 shows some interesting curves which bring out the relations between engine speed and horse-power, and the relative speed of the car to rate of engine revolution when different gears are in operation. The diagrams are the result of a test on a 14 H.P. Siddeley engine made by the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 Excerpt: ...efficiency of the reduction gear. Fig. 28 shows some interesting curves which bring out the relations between engine speed and horse-power, and the relative speed of the car to rate of engine revolution when different gears are in operation. The diagrams are the result of a test on a 14 H.P. Siddeley engine made by the Wolseley Co., which had four cylinders 90 mm. diameter x 102 mm. stroke. The horizontal scale shows engine revolutions per minute, the vertical scale the miles per hour of car speed as referred to the curves of gears, and brake horse-power as referred to that curve. It will be seen that the range of speed on the direct drive was from about 5 miles per hour, equal to 220 revolutions per minute, up to 42 miles per hour at 1,700 revolutions per minute. At the lower limit of speed the engine developed practically no power but just continued to turn, keeping the car moving on the level. It will be seen that the engine is developing its maximum power at speeds from 30 to 40 miles per hour, that At the moment of starting from rest a greater effort is necessary than that required to maintain the speed on the level as explained under the heading of "Friction and Lubrication," and at this moment one half of the clutch is revolving at the speed of the engine whilst the mechanism connected to the other half is 'at rest. The interposition of a speed reduction gear will therefore greatly reduce the difference of the relative velocities of the two portions of the clutch when first brought into engagement, and will allow the car to pick up speed without unduly retarding the speed of the engine. The type of change speed gear, which is almost universal, is that which was originally employed when belt driving was discarded, and is known as the Panhard...
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Add this copy of The Motor Car: a Practical Manual for the Use of to cart. $59.74, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2016 by Palala Press.
