| Abstract | The flow capacity of a Fischer & Porter “Flowrator” had to be increased, for use on a reheated Orenda engine. A new double float was made, and it was seen that the flow area through the spider plates supporting the float guide rod would need to be increased. The spider plate holes were therefore enlarged.
It had been suggested that the original spider plate was of critical design and affected the inlet turbulence, thus controlling the Rn factor in the calibration. The meter was therefore calibrated with the original spider plate and also with a modified lower spider plate. The two calibrations agreed to within 0.1 percent at minimum, half, and full scale reading. It is therefore considered that the modification had no effect on the calibrations. |
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