Page 2 - Combined_104_OCR

H. P. Bruns 2 March 10, 197 0

An altimeter was modified for use. as a very low pressure
measurement system to measure carburetor duct area air pressure on a sampling
of race cars at Daytona. The drivers would read altitude on gage which would be
converted to air pressure relative to standard atmospheric.

The signal conditioning and power supply system redesign con­
tinued to improve size, weight, and reliability by converting to printed circuit
board assemblies for subsystem circuits.

Suspension measurement transducers were relocated with a
flexible cable providing movement motion to transducer to ease installation of
vehicle components and reduce possibility of damage to transducers.

Test vehicle instrumentation was removed and recalibrated and
re-installed for Atlanta tests.

The propeller shaft torque measuring system was rebalanced in
preparation for use in Atlanta tests,

A manually switchable aerodynamic pressure measurement
system was fabricated to allow pressure measurement at several locations using
one pressure transducer and recorder channel.

A D C pecial ag car was instrumented at Huntsville for measuring
the following parameters:

Engine Speed
Front Wheel Speed
Propeller Shaft Speed
Longitudinal Acceleration
Manifold Vacuum
Carburetor Inlet Pressure
Front C Q uspension Displacement
Rear Suspension Displacement

The vehicle system was functionally checked out at Huntsville
at the old airport and transported to Gainesville, Florida, for tests on the drag strip.

Tests were run February 9 at the site of the Gatornationals meet.
All measurements functioned and data were recorded on a number of runs.

Preparations began for instrumentation of a Trans Am car for
tests in early March. Since the test date conflicted with Atlanta tests of Grand
National vehicle, a secondary measurement system was prepared based upon the