18kg Ejection Mitigation - 92041-101-FT
- Technical Product Sheet
In 1991 the National Highway Traffic Safety Administration (NHTSA) initiated research programs concerning motor vehicle rollover protection. As part of that research, NHTSA conducted a crashworthiness research program to evaluate ways to reduce the number of fatalities due to ejection from the vehicle. The program was then expanded from side impact ejections to include ejections from rollover, front, and rear impacts.
More recently, on November 30, 2006, NHTSA released a Memorandum to explain the test procedure guidelines for automotive manufacturers to use for research into the performance of ejection mitigation countermeasures (NHTSA docket 2006-26467). The guideline does not represent a regulatory or compliance test procedure but was put in place for the manufacturers to replicate as an option.
In response to this Memorandum, First Technology Safety & Analysis (FTSA) was approached to supply the 18 kg headform required for this test procedure. The Ejection Mitigation headform was originally produced by FTSA back in 1988 but was discontinued in 1991. FTSA recently created new molds and castings and has launched the headform back into production. It is now available for purchase.
Featureless Face Form
|Feature||X Location||Y Location||Z Location|
|Origin Reference Point||Skull-Head Back Mating Surface||Mid-Saggital Plane||Machined Surface Underside of Skull Horizontal Plate|
|Head Coordinates||2.2 in. / 56 mm||0.0||.8 in. / 20 mm|
|Test Lab Impact Line||N/A||0.0||.8 in. / 20 mm|
|Vehicle Impact Test Location||N/A||0.0||1.8 in. / 46 mm|
|Accelerometer A.I.P.||2.2 in. / 56 mm||0.0||1.8 in. / 46 mm|
|Center of Gravity||2.13 in. / 54 mm||0.0||1.46 in. / 37 mm|
|Headform Mass (w/Accelerometers and Mount)||4.18 / 5.08 kg|
|CG-X forward from skull-cap mating surface||.0490 / .0592 m|
|CG-Y to the left from MSP||-.0051 / .0051 m|
|CG-Z upward from lower horizontal machined surface||.0320 / .0422 m|
|Probe Mass||12.00 ± .026 kg|
|Probe Velocity||1.10 / 1 .30 m/s|
|Probe Force||7.0 / 10.0 kN|
|Temperature||20.6 / 22.2 ºC|
|Relative Humidity||10 / 70 %|
|Description||Dimension (in, ±.1)||Dimension (meter)(ref.)|
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