This first experiment shows a shear resistance for 5 min Z-poxy of 25 kgs.
The bracket used is the Futaba standard size +.
http://www.rcuniverse.com/forum/rc-j...o-bracket.html
The surface of the bracket is 5.165 sq cm.
The shear strength of the glue joint in these conditions is 25kgs for 5.165 cm2 or 4,84 kgs/cm2 or 68.8 PSI.