Page 6 - Combined_138_OCR

Utility of the tunnel will be of prime concern. It would be desirous that

the tunnels have conducted automobile tests in the past. The tunnel must be

adaptable to a ground plane. For full scale testing it would be desirous to

have a dynamometer arrangement in the test section. Sufficient instrumentation

must be available to assure successful test data. The data collection apparatus

should be capable of providing the desired data accuracy and yielding data in

coefficient form, in a short pe 4 iod of time. All the above information will be

resented in tabular form in handbook fashion to aid in facility selection. For
a.
increased data validity, it is desirable that experimental data be obtained in more

than one facility. For this reason several facilitie -j} may U D C selected in which

tests will be conducted. To help resolve any scale effects, several different size

models may be investigated (i. e. , full-scale, 3/8 scale). Before final selection

of a facility or facilities is made, personal inspection of the candidate tunnel(s)

should be made and the tests discussed with tunnel ersonnel to insure complete

understanding on test items.

3. Test Planning and Model Design: Test planning will require input

and guidance from Central Engineering personnel since a complete gamut of

parameters could be covered during a test or a series of tests. Such items as

bumper shape, headlamp fairing, windshield wrap around, windshield slop D C

fast back slope, wheel well opening and rear-end shape are all significant.

Close coordination will be conducted during this phase to insure the desired

results will be achieved. It is anticipated that the earlier literature search

will resolve some of these parameters and reduce the testing required. Within

the scope of the test, however, other parameters must be considered.