Interpretation ID: 7114
Project Engineer
Transportation Research Center of Ohio
East Liberty, OH 43319
Dear Mr. Phillips:
This responds to your letter to this office dated March 20, 1992, in which you inquired whether the Hybrid III large male test dummy, Model No. H3-95-R with 1992 pelvis upgrade, manufactured by First Technology Safety Systems, is an "approved equivalent test device" for conducting the Federal Motor Vehicle Safety Standard (FMVSS) 202 test. I am sorry we could not respond to you on or before April 2 as you requested.
Standard 202, Head Restraints (49 CFR Part 571.202), specifies requirements for head restraints to reduce the frequency and severity of neck injury in rear-end and other collisions. S4.3 of the standard requires that "a head restraint that conforms to either (a) or (b) shall be provided" for certain seating positions. In Standard 202's demonstration procedures relating to the compliance option set forth in S4.3(a), S5.1(a) specifies use of a "dummy having the weight and seated height of a 95th percentile adult male with an approved representation of a human, articulated neck structure, or an approved equivalent test device."
The Model H3-95-R dummy is marketed by First Technology Safety Systems as a "95th Percentile Male Hybrid III Test Dummy." We therefore assume that it has the weight and seated height of a 95th percentile adult male. The only remaining issue of whether the dummy can be used under S5.1(a) is whether it has "an approved representation of a human, articulated neck structure."
In the preamble to the final rule establishing Standard No. 202, NHTSA provided clarification of the term "approved representation of a human articulated neck structure." The agency stated that a neck structure of a test device would be approved if it could be demonstrated by technical test data that the articulation of the neck structure represented that of a human neck. NHTSA indicated that approval could only be given to a structure sufficiently described in performance parameters to ensure reliable and reproducible test data. See 33 FR 2945-2946, February 14, 1968.
You did not provide any specifications or test data concerning the Hybrid III 95th percentile male dummy (Model H3-95-R). However, NHTSA conducted an extensive evaluation of the Hybrid III 50th percentile male dummy, including its neck, in the context of specifying its use (as one of two alternative 50th percentile male dummies) in Standard No. 208, Occupant Crash Protection, dummy. The specifications for the Hybrid III test dummy, for purposes of Standard No. 208, are set forth in Subpart E of 49 CFR Part 572. The specifications for the other 50th percentile male dummy used in Standard No. 208 are set forth in Subpart B of 49 CFR Part 572.
We understand that the Hybrid III 95th percentile male dummy is essentially a scaled version of the Hybrid III 50th percentile male dummy. We therefore approve a Hybrid III 95th percentile male dummy for purposes of Standard 202, so long as its neck structure is essentially the same as that of the Part 572 Hybrid III test dummy, other than minor differences related to adjustments for length. For the same reasons, we approve use of a 95th percentile male version of the dummy specified in Subpart B of 49 CFR Part 572, so long as its neck structure is essentially the same as that specified in Part 572, other than minor differences related to adjustments to length.
I hope the above information will be of assistance to you. If you have any further questions with regard to this matter, please feel free to contact Walter Myers of my staff at this address or by telephone at (202) 366-2992.
Sincerely,
Paul Jackson Rice Chief Counsel
ref:202 d:5/5/92