. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. which it can have to be applied ; and, to fit it to a given shaft, an internal collar must be prepared,which will fit externally the interior of the turbine boss and internallv the exterior of the screwshaft; and a proper keyway will be required for each fitting. The turbine thus mounted will runtrue on the screw sliaft. The ship, before she leaves the dock for the trial of her machinery, will have the instrumentmounted as described, in place of her screw, Fig. 1086. The casing will be provided with proper
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. which it can have to be applied ; and, to fit it to a given shaft, an internal collar must be prepared,which will fit externally the interior of the turbine boss and internallv the exterior of the screwshaft; and a proper keyway will be required for each fitting. The turbine thus mounted will runtrue on the screw sliaft. The ship, before she leaves the dock for the trial of her machinery, will have the instrumentmounted as described, in place of her screw, Fig. 1086. The casing will be provided with proper apertures, capable of being closed at will, to permit the egress of air and the ingress of water as thedock fills. The casing will thus be in a condition to receive the moment of rotation delivered bythe screw, and to communicate it to the recording apparatus. If the moment to be recorded is regarded as a product of two factors, force and leverage, of DYNAMOMETEE. 517 108S. which the one must vary inversely as the other, it is a question to be settled by considerations ofconvenience, whether tlie record shall take the shape of a large force delivered at short leverage, orthe reverse ; the force factor will prove inconveniently large, if taken account of at the circumferenceof the casing, and it is desirable for several reasons that itshould be obliged to develope itself at a leverage enlargedto many times the radius of the casing. The assumed maximum which the instrument de-scribed was calculated to deal with, was stated to be 2000horse-power delivered at 90 revolutions a minute; andt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
