Page 2 - Combined_64_OCR

the Ampex was in only one position with tape natational direction aligned in the vehicle

pitch plane. Late Tuesday morning the vehicle was run with the Ampex in position and

tape recordings made of resulting signal variations.

The Ampex was removed during lunch down time and a Sony Model

-brought diwm from Detroityyvas installed in the same position and runs made after lunch.

AC power was again tapped off the inverter, although the Sony can operate off of 12 V DC

if required, e > "T e.

The Lockheed representative came in Tuesday afternoon with a modified version

of the Lockheed Model for evaluation. This unit was installed late Tuesday

-hr the same pooition and testing continued. . The Lockheed was battery powered and com-
TU e. v
pletely self contained. J£-was tested with tape reels rotating in-fctii- the car pheh and yaw

axis, iirgreparato runs.

Tuesday night it was decided to make parallel measurements of engine speed on

the Brush pen recorder and a tape recorder along with the acoustic measurements on

another channel of the tape recorder. The Lockheed representative allowed us to use his

recorder for convenience since he had planned to stay over Wednesday.

Wednesday morning the Lockheed recorder was re-installed with tape rotating in

yaw direction (reels horizontal) and the microphone was installed on a roll bar near the
V*
drivers helmet. The engine speed measurement was paralleled on a separated tape

channel with the input to the Brush pen recorder.

Late Wednesday morning several runs were made and data recorded. The engine

speed was played back after the rim onto the brush and duplicated the original pen record­

ing.

The data was returned to Huntsville for further analysis and evaluation of individual

recorder performance.

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