Page 3 - Combined_144_OCR

H. P. Bruns 3 February 9, 1970

prior to race Sunday that the helmet was too heavy and he would not use it.
He had X w eviously practiced approximately twenty minutes with it and did
not complain.

The ... ystem was hastily transferred to Bobby Allison’s car
race CL P m o rning and the microphone and one speaker installed in his helmet,
The system performed well except for car-to-pit communication which picked
up backgroun car noise. The hasty mike installation, however, became un­
comfortable during progress of race and had to be removed during a pit stop,
The C O C O tern was returned to Huntsville for rework and preparation for installa-
tion in Richard Petty’s car for Daytona.

Design and fabrication of an electronic filter network began
in an attempt to reduce or eliminate the engine exhaust pulse noise problems.

Small hand-held portable radio units are under investigation
for alternate lightweight car units and as communication to individuals and
pits around the racetrack.

3. Mobile Control Center

The mobile center remained in California after tests in December
an X wa used during pre-race activities for the Riverside 500.

The Permatex 200 mile race was scored with the computer system
and worked well until a visitor inside th D C n enter bumped a switch and shut down
the computer. Mr. Hutchinson provided personnel to operate manual input. C O
thus saving tra p c o portation of personnel to races.

Sunday, Januar 18, the Riverside 500 race wa C O cored and
problems occurred which introduced several erroneous signals and caused
system dropout several times. Th o p oblem was traced afterwards to a loose
computer power supply unit which had apparently haken loose during trip
from Texas in December 1969.

monitored and.
C d
The NASCAR radio broadcast during the race w -
recorded. The AM radio failed to operate and has been replaced with a
reliable auto unit.

The control center was returned to Huntsville and CL r-i epared for

Daytona pre-race an X race support.