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INTER COMPANY CORRESPONDENCE
FILE DATE
CODE
TO - NAME DEPT. DIVISION PLANT/OFFICE
H. Bader, Jr. S&M Engineering Space Huntsville
FROM - NAME DEPT. DIVISION PLANT/OFFICE
W. P. Wright S&M Engineering Space Huntsville
SUBJECT:
Race Car Yaw Angle Instrumentation
The planned wind tunnel tests of 3/8 scale model race cars will include
yaw angle stability studies to determine effects of slip angles or yaw on auto
mobile lift and drag characteristics. Hopefully, these tests and studies will yield
information for improving vehicle cornering and traffic (drafting) handling character
istics . The goal, of course, is to obtain a design or modifications which will create
positive stability situation, i.e., as yaw angle increases the lift and drag char-
acteristics should provide increasing corrective forces to the vehicle. Presently
little is known about particular vehicle design features affecting high speed handling
in sufficient depth to obtain predictable results. u O' ° ( 5
Wind tunnel tests currently planned will attempt to duplicate general aero
dynamic conditions without cross wind or turbulence effects. The test vehicles will
be yawed to investigate basic effects of lift and drag on standard and modified model
designs. U-C^-r- “to □ «
Proving ground tests have been unable to duplicate race track conditions of
slip or yaw due to basic differences in race track design. Measurements of race car
yaw angles have been restricted to observations of movies taken at Daytona. A
reasonably accurate method of yaw angle measurement is needed to correlate with
wind tunnel tests and results.
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