ALL essential data on operation, performance and stresses of a new‐model aircraft in flight test are picked up, transmitted and recorded automatically by a radio system developed and built by Vultec Aircraft Inc., of Downey, California. The indications of seventy‐two different instruments in the machine can be transmitted a distance of about 100 miles and recorded simultaneously at a ground station at a maximum speed of 100 instrument readings per second.
Wilkin Perry, H. (1943), "A Radio Flight‐Test Recorder: Observations Made in the Aeroplane Recorded on the Ground", Aircraft Engineering and Aerospace Technology, Vol. 15 No. 6, pp. 174-178. https://doi.org/10.1108/eb031027
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