Aeronautic Instruments. Section III : Aircraft Speed Instruments (1923)
NASA Technical Reports Server (NTRS) · leaf 6
of the velocity and (3) to the square root of the density of the air stream. Consequently, if the grid is openly exposed to the full wind stream it is insensitive at the higher velocities. This difficulty has been overcome in a recently proposed device in which the grid is inclosed in a stream-line… … Fig. 1.—Pitot nozzles edly increased. By varying the size of the perforations in the plug the instrument can be made sensitive for the desired range of velocities. The grid is maintained at a constant temperature of from 200° to 300° C. above that of the air stream by balancing it on a bridge. The…
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