§572.36. Test conditions and instrumentation. — Inbound Citations

(a) The test probe for lateral shoulder, thorax without arm, abdomen, and pelvis impact tests is the same as that specified in § 572.36(a) and the impact probe has a minimum mass moment of inertia in yaw of 9,000 kg-cm 2, a free air resonant frequency not less than 1,000 Hz and the probe's end opposite to the impact face has provisions to mount an accelerometer with its sensitive axis collinear with the longitudinal axis of the probe. All hardware attached directly to the impactor and one-third ( 1/3) of the mass of the suspension cables must be included in the calculations of the total impactor mass. The sum mass of the attachments and 1/3 cable mass must not exceed 5 percent of the total pendulum mass. No suspension hardware, suspension cables, or any other attachments to the test probe, including velocity vane, shall make contact with the dummy during the test.

(b) When impacted by a test probe conforming to § 572.36(a) at 22 fps ±0.40 fps in accordance with paragraph (c) of this section, the thorax of a complete dummy assembly (78051-218, revision U, without shoes, shall resist with a force of 1242.5 pounds ±82.5 pounds measured by the test probe and shall have a sternum displacement measured relative to spine of 2.68 inches ±0.18 inches. The internal hysteresis in each impact shall be more than 69% but less than 85%. The force measured is the product of pendulum mass and deceleration.

(1) When each knee of the leg assemblies is impacted in accordance with paragraph (b)(2) of this section, at 6.9 ft/sec ±0.10 ft/sec by the pendulum defined in § 572.36(b), the peak knee impact force, which is a product of pendulum mass and acceleration, shall have a minimum value of not less than 1060 pounds and a maximum value of not more than 1300 pounds.

The head assembly consists of the head (drawing 78051-61X, rev. C) with the neck transducer structural replacement (drawing 78051-383X, rev. P) and three (3) accelerometers that are mounted in conformance to § 572.36 (c).

(d) Head accelerometer mounting is the same as specified in § 572.36(c).

(b) 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 § 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).

The head/neck assembly consists of the parts 78051-61X, rev. C; -84; -90, rev. A; -94; -98; -104, revision F; -303, rev. E;—305; -306; -307, rev. X and has a six axis neck transducer (drawing C-1709, revision D) installed in conformance with § 572.36(d).

(e) Neck transducer mounting is the same as specified in § 572.36(d).

(b) When the head and neck assembly (consisting of the parts 78051-61X, revision C; -90, revision A; -84; -94; -98; -104, revision F; -303, revision E; -305; -306; -307, revision X) which has a six axis neck transducer (Drawing number C-1709, Revision D, titled “Neck transducer,” dated February 1, 1993.) installed in conformance with § 572.36(d), is tested in accordance with paragraph (c) of this section, it shall have the following characteristics:

(i) Plane D, referenced in Figure 20, shall rotate between 64 degrees and 78 degrees, which shall occur between 57 milliseconds (ms) and 64 ms from time zero. In first rebound, the rotation of Plane D shall cross 0 degrees between 113 ms and 128 ms.

(ii) The moment measured by the six axis neck transducer (drawing C-1709, revision D) about the occipital condyles, referenced in Figure 20, shall be calculated by the following formula: Moment (lbs-ft) = My−0.058 × Fx, where My is the moment measured in lbs-ft by the “Y” axis moment sensor of the six axis neck transducer and Fx is the force measured in lbs by the “X” axis force sensor (Channel Class 600) of the six axis neck transducer. The moment shall have a maximum value between 65 lbs-ft and 80 lbs-ft occurring between 47ms and 58 ms, and the positive moment shall decay for the first time to 0 lb-ft between 97 ms and 107 ms.

(i) Plane D, referenced in Figure 21, shall rotate between 81 degrees and 106 degrees, which shall occur between 72 ms and 82 ms from time zero. In first rebound, rotation of Plane D shall cross 0 degrees between 147 ms and 174 ms.

(ii) The moment measured by the six axis neck transducer (drawing C-1709, revision D) about the occipital condyles, referenced in Figure 21, shall be calculated by the following formula: Moment (lbs-ft) = My−0.058 × Fx, where My is the moment measured in lbs-ft by the “Y” axis moment sensor of the six axis neck transducer and Fx is the force measured in lbs by the “X” axis force sensor (Channel Class 600) of the six axis neck transducer. The moment shall have a maximum value between—39 lbs-ft and -59 lbs-ft, occurring between 65 ms and 79 ms, and the negative moment shall decay for the first time to 0 lb-ft between 120 ms and 148 ms.