Steam power plants, their design and construction . cations should require the engine builderto cut a key-way in the shaft. The dynamo builder usually sup-plies a key for keying the armature of the dynamos on the engineshaft. The dynamo and engine are sometimes shipped by theirrespective builders to the site of the power plant and the engineor the dynamo builder fits the armature to the shaft. In otherinstances the armature of the dynamo is shipped to the enginebuilder and is put on the shaft by the latter. The specificationshould state what each builder is to do in this respect. A specificati
Steam power plants, their design and construction . cations should require the engine builderto cut a key-way in the shaft. The dynamo builder usually sup-plies a key for keying the armature of the dynamos on the engineshaft. The dynamo and engine are sometimes shipped by theirrespective builders to the site of the power plant and the engineor the dynamo builder fits the armature to the shaft. In otherinstances the armature of the dynamo is shipped to the enginebuilder and is put on the shaft by the latter. The specificationshould state what each builder is to do in this respect. A specification often asks what steam consumption the builderof an engine will guarantee. If a guarantee as to steam consump-tion is to be made, it should be of the following general form: The engine is guaranteed to consume not more than pounds of steam per indicated horse-power per hour when de-veloping —— horse-power when running at a speed of revolutions per minute with a steam pressure of pounds above the atmosphere, and with a back pressure of pounds. ^liyecfion X J ,i Floor Siand.
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