Aeronautic Instruments. Section III : Aircraft Speed Instruments (1923)
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essed near the center by an adjustable set screw K. The lower spring S conforms to the curved surface of the upper spring S' which is adjustable, thus making it possible to vary the openness of the scale. The lever L also provides an additional means of adjustment. This indicator was designed for… … Fig. 11.—Atmos air-speed indicator Fig. 12.—Pioneer air-speed indicator, liquid type shown and also in figure ID. The reservoir at the base is of large diameter compared with that of the column of liquid which indicates the air speed, so that practically all of the motion of the liquid is in the…
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