[Code of Federal Regulations]
[Title 49, Volume 5]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 49CFR572.72]

[Page 802-803]
 
                        TITLE 49--TRANSPORTATION
 
                            OF TRANSPORTATION
 
PART 572--ANTHROPOMORPHIC TEST DEVICES--Table of Contents
 
                       Subpart I--6-Year-Old Child
 
Sec. 572.72  Head assembly and test procedure.

    (a) Head assembly. The head consists of the assembly designated as 
SA 106 010 on drawing No. SA 106C 001, sheet 2, and conforms to each 
drawing listed on SA 106C 001, sheet 8.

[[Page 803]]

    (b) Head assembly impact response requirements. When the head is 
impacted by a test probe conforming to Sec. 572.77(a)(1) at 7 feet per 
second (fps) according to the test procedure in paragraph (c) of this 
section, then the resultant head acceleration measured at the location 
of the accelerometer installed in the headform according to 
Sec. 577.77(b) is not less than 130g and not more than 160g.
    (1) The recorded acceleration-time curve for this test is unimodal 
at or above the 50g level, and lies at or above that level for an 
interval not less than 1.0 and not more than 2.0 milliseconds.
    (2) The lateral acceleration vector does not exceed 5g.
    (c) Head test procedure. The test procedure for the head is as 
follows:
    (1) Seat and orient the dummy on a seating surface having a back 
support as specified in Sec. 572.78(c), and adjust the joints of the 
limbs at any setting (between 1g and 2g) which just supports the limbs' 
weight when the limbs are extended horizontally and forward.
    (2) Adjust the test probe so that its longitudinal center line is--
    (i) At the forehead at the point of orthogonal intersection of the 
head midsagittal plane and the transverse plane which is perpendicular 
to the Z axis of the head as shown in Figure 40;
    (ii) Located 2.70.1 inches below the top of the head 
measured along the Z axis, and;
    (iii) Coincides within 2 degrees with the line made by the 
intersection of the horizontal and midsagittal planes passing through 
this point.
    (3) Impact the head with the test probe so that at the moment of 
contact the probe's longitudinal center line falls within 2 degrees of a 
horizontal line in the dummy's midsagittal plane.
    (4) Guide the test probe during impact so that there is no 
significant lateral, vertical, or rotational movement.
    (5) Allow at least 60 minutes between successive head tests.