[Code of Federal Regulations]
[Title 49, Volume 6]
[Revised as of October 1, 2006]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR572.32]

[Page 920-921]
 
                        TITLE 49--TRANSPORTATION
 
                   CHAPTER V--NATIONAL HIGHWAY TRAFFIC
                    SAFETY ADMINISTRATION, DEPARTMENT
                            OF TRANSPORTATION
 
PART 572_ANTHROPOMORPHIC TEST DEVICES--Table of Contents
 
                     Subpart E_Hybrid III Test Dummy
 
Sec.  572.32  Head.

    (a) The head consists of the assembly shown in drawing 78051-61X, 
revision C, and conforms to each of the drawings subtended therein.
    (b) When the head (Drawing number 78051-61X, titled ``head 
assembly--complete,'' dated March 28, 1997 (Revision C) with six axis 
neck transducer structural replacement (Drawing number 78051-383X, 
Revision P, titled ``Neck Transducer Structural Replacement,'' dated 
November 1, 1995) is dropped from a height of 14.8 inches in accordance 
with paragraph (c) of this section, the peak resultant accelerations at 
the location of the accelerometers mounted in the head in accordance 
with Sec.  572.36(c) shall not be less than 225g, and not more than 
275g. The acceleration/time curve for the test shall be unimodal to the 
extent that oscillations occurring after the main acceleration pulse are 
less than ten percent (zero to peak) of the main pulse. The lateral 
acceleration vector shall not exceed 15g (zero to peak).
    (c) Test procedure. (1) Soak the head assembly in a test environment 
at any temperature between 66 degrees F to 78 degrees F and at a 
relative humidity from 10% to 70% for a period of at least four hours 
prior to its application in a test.
    (2) Clean the head's skin surface and the surface of the impact 
plate with 1,1,1 Trichlorethane or equivalent.
    (3) Suspend the head, as shown in Figure 19, so that the lowest 
point on the forehead is 0.5 inches below the lowest point on the 
dummy's nose when the midsagittal plane is vertical.

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[GRAPHIC] [TIFF OMITTED] TC01AU91.162

    (4) Drop the head from the specified height by means that ensure 
instant release into a rigidly supported flat horizontal steel plate, 
which is 2 inches thick and 2 feet square. The plate shall have a clean, 
dry surface and any microfinish of not less than 8 microinches (rms) and 
not more than 80 microinches (rms).
    (5) Allow at least 3 hours between successive tests on the same 
head.

[51 FR 26701, July 25, 1986, as amended at 62 FR 27514, May 20, 1997]

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