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facility. Test section size, physical and effective, will be given. Also,

tunnel turbulence level and blockag ( 0 4 atio will be determined for each

installation.

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

that^bhoy-have conducted automobile tests in the past. The tunnel must C T D C

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

to have a dynamometer arrangement in the test section. Sufficient instru­

mentation must be available to assure successful test data. The data

collection apparatus should C T c d o

and yielding data in coefficient form, in a short pe iod of time. All the

above information will be presented in tabular form in handbook fashion to

aid in facility selection. For increased data validity, it is desirous that

experimental data be obtained in more than one facility. For this reason

several facilities may be selected in which tests will be conducted. To help

resolve any scale effects, several different size models may be investigated

(i. , full-scale, 3/8 scale). Before final selection of a facility or facilitie

is made, personal inspection of the candidate tunnel(s) should be made and

the the tests discussed with tunnel personnel to insurej/mutual agreements

on test items.

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

•gomrrinput and guidance from Central Engineering personnel since a complet Q

gamjlt of parameters could be covered during a test or a series of tests.