Page 2 - Combined_55_OCR

W. P. Wright 2 May 26, 1970

Thursday, May 14, 1970:

Seven test runs, averaging ten laps each, were run this day. Of primary
interests were the tire differences and the car’s cooling systems. The
measurements recorded during these tests were; Engine RPM, Drive Shaft Torque,
Oil Cooler outlet temperature, Radiator input water temperature, Radiator
output water temperature, right rear suspension displacement, left rear
suspension displacement, yaw, vertical acceleration, and left front suspension
displacement.

The temperature data was stripped prior to the conclusion of the day’s work.

Friday, May 15, 1970:

A thirty lap test run was planned for Friday to observe the cooling systems.
Two short test runs were made with the original suspension set-up and a
different suspension set-up. The third time out was the thirty laps, however,
after seven laps the engine blew a spark plug and the tests were concluded
at this point. The measurements recorded were; Engine RPM, Drive Shaft
Torque, Yaw, Right Rear Suspension Displacement, Radiator Input Water
Temperature, Radiator Output Water Temperature, and Left Front suspension
displacement. The remainder of the afternoon was spent in loading equipment
and cleaning up the garage area.

The following measurements presented problem during the week.

a. Tachometer Generator: Broken housing on one unit. A replacement was
calibrated and the output during the test runs appeared low. The
generator brushes are sensitive to oil and wear quickly when exposed
to oil. This graphite oil mix fills the commutator gaps and therefore
reduces the output. New units with oil seals have been ordered for
evaluation.

b. Resistance Thermometers: Two units failed during the week and have been
returned to the vendor for failure analysis. Suspicions are that vibration
or shock cause the units to fail as open circuits. These units will be
replaced with thermocouples or more rugged resistance thermometer units
from another vendoro

c. Oil Pressure Transducer: This unit failed during the week. The unit has
been used consistently and apparently failed from fatigue. New units
have been ordered.

d. Lateral Accelerometer: This unit appeared to have potentiometer wiper
hang-up. New units have been orderedo

H. H. Miller
HHM:dm

cc: H. Bader L. J. Rathget
H. P. Bruns G. M. Wallace