Building has continued over the past couple of days and I completed the left side. I spent the usual time pulling staples and then trimmed the excess plywood from a couple of areas. Since the sides were done I removed the fuselage building jigs from the table and the blobs of cured epoxy.
The first spar that I decided to build is the anti-tab spar because it is the smallest and most simple of the 11 spars that will be built. You might ask "What the heck is an anti-tab?" An anti-tab, anti-servo tab, or anti-balance tab is a control surface that is at the rear of another control surface and moves in the same direction as the control surface to add more control effort to the movement of the primary control surface and can act as a trim device also. So when the canard trailing edge is lowered, the anti-tab also lowers but at a greater angle. Clear as mud and twice as thick? I got the 8mm square pieces cut and glued tonight. Tomorrow I hope to add the plywood sheer webs to the spar to finish it up. The plans call for 1.2mm birch ply but I will be using 1.5mm because the former is not available.
Number of hours: 3.5
Total hours: 76.7
the anti-tab also lowers but at a greater angle
ReplyDeleteno,anti tab go up
bye Roberto
I must disagree with you on this one Roberto. The pivot for the canard is at the spar and the anti-tab control rod attaches to the anti-tab control horn aft of the spar. This means that when the trailing edge of the canard is lowered the anti-tab control rod will push the control horn up and this will force the anti-tab down.
ReplyDelete