I'm trying to synthesize the plans steps to machine things correctly before assembly and I'm a little stumped.
Running fore to aft the side skin attaches to the longeron (1418) with a lot of rivets and a row of nut plates at the aft end. The nut plates go inside the longeron according to a prior question. These plates are used for the fairings later in the project and I think that the nut plate screw holes should take a flush screw. So it seems that I should be dimpling the center nut plate hole on the skin, and then countersinking the longeron for it.
But I can't find an explicit instruction to do that. I did find one for the nut plates taking flush screws on the access cover - I'm planning to do that.
But are the fairing cover screws flush and need additional steps, or not? Or is it in the instructions and I just can't put it together correctly?
Second question: on the access cover flush screw installation - it says to machine countersink the skin and longeron to take the dimple of the cover. So do I countersink the longero/skin sandwich like it says, or do I dimple the skin and countersink the longeron. The nut plate is attached and it seems that c/s the sandwich is the way to go.
Running fore to aft the side skin attaches to the longeron (1418) with a lot of rivets and a row of nut plates at the aft end. The nut plates go inside the longeron according to a prior question. These plates are used for the fairings later in the project and I think that the nut plate screw holes should take a flush screw. So it seems that I should be dimpling the center nut plate hole on the skin, and then countersinking the longeron for it.
But I can't find an explicit instruction to do that. I did find one for the nut plates taking flush screws on the access cover - I'm planning to do that.
But are the fairing cover screws flush and need additional steps, or not? Or is it in the instructions and I just can't put it together correctly?
Second question: on the access cover flush screw installation - it says to machine countersink the skin and longeron to take the dimple of the cover. So do I countersink the longero/skin sandwich like it says, or do I dimple the skin and countersink the longeron. The nut plate is attached and it seems that c/s the sandwich is the way to go.