BS EN 960:2006 pdf download

BS EN 960:2006 pdf download.Headforms for use inthe testing of protective helmets.

2.11
centre of gravity of the thr...quart.r headform point A
for a given headlomi, the point on the central vertical axis located at a vertical distance 12,7mm above the reference plane
2.12
centre of gravity of the full headform
point G
for a given headform, the point on the central vertical axis located at a vertical distance ‘z’ below the reference
plane, as given In Table 1
2.13
geometric centre point R
for a given headform, the point on the central vertical axis, located at its intersection with the reference plane
NOTE This pout is the datum for all the dimensions given in Annex A.
3 Requirements
3.1 Materials and general characteristics
3.1.1 Heedforms for shock absorption and penetration tests, with falling h.adformThelm.t assembly The headlorms shall be made of metal and, together with any means for their support, shall exhibit no resonance below a frequency of 2 000 HL
Full headforrns shall have the following characteristics
a) the centre of gravity shall be located within a 10 mm radius of pout G on the central vertical axis;
b) a faollty for attaching an accelerometer shall be Incorporated such that, with the headfom, In any angular orientation, the respective sensitive axes of the accelerometer shall pass within 10 mm of point G;
C) the appropriate mass. if specified in Table 1.
Three-quarter headforms shall have the following characteristics:
i) the centre of gravity shall be located within a 10 mm radius of pout A on the central vertical axis.