Page 3 - Combined_76_OCR

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Cooling problems havo been increasing in both number and complexity
.with the expanding number of modulo, larger and higher porformanoo engines,
exhaust omission control, air conditioning, trailer towing, ata.
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Basic data concerning the effects of car dosign on cooling are not t
adequately obtained to meet tho demands made. Data to guiclo design are
falling short of tho noeds concerning grillo, radiator, fan relation­
ships, grillo toxturo and other cooling air opening requirements, car
front end aerodynamics, otc. ' . «
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Cooling systom requirements antf'development problems havo reached I
a point where u chassis dynamometer wind tunnel io urgently needed to
moot present day requirements.! Such a facility could reasonably be
expected to result in savings of $3^0,000 to $$00,000 annually in radiator
and associated component costs. • %
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Other major automotive companies utilize wind tunnels for the basic
engine cooling development work Ford ha's two and General Motors has five
with plans to add two more.
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A wind tunnel with a controlled environment would provide the follow­
ing advantages:

Proper evaluation of engine cooling on air conditioned cars /
with air conditioning operating and with proper ambients and *• 4 '
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solar heat load factors. Although this is tho most critical
problem, very little A/C on tooting!is now possible.
' Improved test reliability duo to tho ability to measure engine ! t
heat rejection during! tho cooling porformanco tests. Thio to—
’ gather with control of variable s'* that affect cooling should make
it possiblo to determine cooling system performance requirements
to meet cooling standards with much improved accuracy and result-' »»* U'J
ing cost savings,
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3® Evaluation of new model front en< ds, questionable for cooling, *
could be checked with1 air condit: ioning operating for their
development and approval. 4..'" *
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New model front end mock-ups could be made moro quickly and
.economically as rigors of to sting would not bo encountered.
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Cooling airflow studios could be1 effectively oonductcd as
rogardo to tho engine' compartment and tho rolatod environment.

6« ; Elimination of tost inccuracy duo to uncontrolled wind and
ambiont tornporaturo conditions I
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7. Elimination of tost o^oppago due to inclcmont weather. (During
tho past 5 months, tqoto wcro ai ncollod 42% of tho timo and many
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of tho toot runo woro of questionable aocejitabillty).
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