I just finished drilling the skins and the trailing edge wedge, next comes the dimpling and countersinking. Here is where I am confused:
"(Dimpling the spar is a special case. It is 0.040" thick - a bit thick to dimple well and a bit thin to machine countersink safely. So, we combine methods by dimpling first, then enlarging the dimple with the hand deburring tool. This is done by eye and tested by dropping a rivet in the hole to determine fit.) Machine countersink the spar and trailing edge wedge with the microstop countersinking tool."
The first part says the spar is too thin to machine countersink safely, but the second part says to machine countersink the spar. Which is it?
"(Dimpling the spar is a special case. It is 0.040" thick - a bit thick to dimple well and a bit thin to machine countersink safely. So, we combine methods by dimpling first, then enlarging the dimple with the hand deburring tool. This is done by eye and tested by dropping a rivet in the hole to determine fit.) Machine countersink the spar and trailing edge wedge with the microstop countersinking tool."
The first part says the spar is too thin to machine countersink safely, but the second part says to machine countersink the spar. Which is it?