Quite a bit of time was spent today researching the source for alum Tee bar as suggested by Dean Collins's hinge and control arm mods.. To no avail save for the comments found on the KR web site. I did discover that 6063 T5 mentioned on that site as the grade of Tee stock found at the local hardware store is roughly half the strenght of 6061 T6. However that doesn't tell us if 6063 T5 is not adequate enough. I suspect that it is, with it's tensile and yield strenghts exceeding 20,000 psi....but I am not going to rearch this further as it is likely that I am wasting time. The very same parts can be made with 6061 T6 angle stock. Nor is there any practical value in doubling up 2 angles to make a Tee. It does not have to be a hinged horn either. On the horizontals place two Dean hinges on either side of the control horn and on the rudder 3 hinges equally spaced above the horn. Incidently, the Brinnell Hardness of 6063 T5 is rated as 60. I could not find the Brinnell results for 6061 T6. This is of value if you are using the horns as hinges. Any one with comments?? Pat
