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Updated: June 13, 2025
In the case of a single-flow turbine of the Parsons type, the covers should be taken off and every row of blades carefully examined for deposits, mechanical irregularities, deflection from the true radial and vertical positions, etc. The blade clearances also should be gaged all around the circumference, to insure this clearance being an average working minimum.
In the case of a consumption test upon a turbine exhausting into a barometric condenser, and where the steam consumed is being measured by the evaporation in the boiler over the test period, time must be devoted to the feed-pipes between the feed-water measuring meter or tank and the boilers.
In this second hypothetical case, then, with a closed and disabled atmospheric valve, the exhaust must take place through the condenser, until the turbine can be shut down, or the circulating water regained without the former course being found necessary.
Water used in the glands of the turbine must be free from scale-forming impurities and should be delivered at the turbine under a steady pressure of not less than 15 pounds. The pressure in the glands will vary from 4 to 10 pounds. This water may be warm. In the use of water for the cooling coils and of oil for the lubricating system, nothing more is required than ordinary good sense dictates.
I knew that I had a sufficiently light motor in my own modification of Bridger's light turbine, but I knew too that until I had cured my aeroplane of a tendency demanding constant alertness from me, a tendency to jerk up its nose at unexpected moments and slide back upon me, the application of an engine would be little short of suicide. But that I will tell about later.
This turbine has a lower efficiency than Schmid's machine, and is less suitable for high pressures; but it possesses this advantage over it, that by regulating the amount of opening of the distributer, and consequently the quantity of water admitted, the force can be altered without altering the velocity of rotation.
Obstructing projections on the inside periphery of the annular tank assist the water to carry the latter along with it in its circular motion. For small steam motors, particularly for agricultural and domestic purposes, the turbine principle is destined to render services of the utmost importance.
Although steam leakage through the valves of a turbine may not materially affect its steam consumption, unless it be the leakage through the overload valve during a run on normal full load, a thorough examination of all valves is advocated for many reasons.
That they should have squandered the old country in drink and pledge to the foreigner! It's too bad if it's true." "Click" went the turbine; and the lift with soldier shot upwards to the "Fort." And there stood, in the sunset, and the country looked just as it had looked when the chimes in the belfry Haesjoer chimed, and Gustav Wasa entered Stockholm, surrounded by his generals.
All movements are relative to something else, and what we have to do with a stream of water in a turbine is to reduce its velocity relatively to the earth, quite a different thing to its velocity in relation to the turbine; for while the one may be zero, the other may be anything we please.
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