Plans notation question

[Andy Walker]

Okay, looking at the plans page where you put the forward fuselage together (SNX-F12, I *think*), I had to scratch my head a bit. Looking at the floor of the forward fuselage, there are three different rivet location notations:

1) "crosshair" -- drill but do not rivet. Check.

2) "crosshair" and circle -- drill and rivet. Check.

3) circle only -- huh? Does this mean do not drill at this time, or something else entirely?

I is confused.

[Andy Walker]

Bueller...Bueller... :lol:

[chris]

Is it on F12? Maybe its a hole drilled previously? I can't figure out where you are looking exactly...can you be a little more specific?

[Andy Walker]

Whoops sorry, it's F11, bottom third of the page, the view of the floor from the bottom looking up.

[chris]

Check F09. I think that's where those parts are riveted to the lower skin. Looks to me like pilot holes are located and drilled on F16 then assembled on F09. They are shown on F11 because the pilot holes are already there.....but maybe somebody who has actually built one of these things will chime in :)

[MichaelFarley56]

I wish I could help more but I'm currently on the road and don't have my plans with me. If the circles are where the spar carry through is, then I think you're right...the circles are simply pilot holes in the bottom skin that you can ignore for now. It's confusing but you'll leave a lot of parts off the side and bottom skins until you fit your wings. Once that's done you'll be able to finish the carry through assembly then build the lower seat angle parts.

As soon as I get home I'll check my plans. In the meantime, could you possibly take a picture of what you're looking at and post it on here?

[Andy Walker]

I wish I could help more but I'm currently on the road and don't have my plans with me. If the circles are where the spar carry through is, then I think you're right...the circles are simply pilot holes in the bottom skin that you can ignore for now. It's confusing but you'll leave a lot of parts off the side and bottom skins until you fit your wings. Once that's done you'll be able to finish the carry through assembly then build the lower seat angle parts.

As soon as I get home I'll check my plans. In the meantime, could you possibly take a picture of what you're looking at and post it on here?

Bah, didn't see your response until this morning so I didn't take a pic...I'll snap one tonight. The rivets I'm talking about are not in the main spar tunnel area, they are behind that. The holes in the floor skin, where they cover the longerons, are in groupings with some wider spaces between. Going from back to front, I think the ones I mean are the second group of holes along each longeron.

Yeah, this will probably require a pic. :lol:

[sonex892]

Okay, looking at the plans page where you put the forward fuselage together (SNX-F12, I *think*), I had to scratch my head a bit. Looking at the floor of the forward fuselage, there are three different rivet location notations:

1) "crosshair" -- drill but do not rivet. Check.

2) "crosshair" and circle -- drill and rivet. Check.

3) circle only -- huh? Does this mean do not drill at this time, or something else entirely?

I is confused.

Hi Andy

If we are both looking at the same place on the page, I think you already have it worked out

1) "crosshair" -- drill but do not rivet. Check.( Yes the note says locate as per the pilot holes in the floorskin. These parts cant be rivetted until after the wing has been rigged.)

2) "crosshair" and circle -- drill and rivet. Check.( yes can drill and rivet if installing the floor at this stage)

3) circle only -- huh? Does this mean do not drill at this time, or something else entirely?( showing pilot holes in floor skin. The parts that attach here also need to be rivetted only after the wing has been rigged and the rear spar tunnel installed)

Personally rivetting the floor skin in place was the very last job I did on my plane before weighing. It allowed access to places which would otherwise be difficult. eg Wing rigging, wiring, fuel tank, rudder pedals, flaps brakes and prbably more. I did however prepare the floor for rivetting (updrill and debur) at, I guess the same stage your up to at the moment. I used the floor to align the fuselage sides whilst fitting and rivetting the forward spar tunnel and firewall to the fuselage sides. I just re-clecoed the floor in place whenever I was drilling, or rivetting nearby to maintain the alignment.

Cheers Steve
Sonex 892 3300 VH-ZSX 77 hrs

[Andy Walker]

Okay, here's the pic showing my confusion. Just above (toward the front of the aircraft) of the circled area "C" is a set of rivets along the longeron where the pilot holes are just noted as small circles, the same as the line going across the fuselage to the right on the image. Do these get drilled out here, or later?

[MichaelFarley56]

You will soon find that a triangle gusset plate goes there to add strength to the lower seat crosstie when you start building that section. I think I left the longeron undrilled at this point but looking back I don't think you're going to hurt anything if you go ahead and pilot drill those holes to #40. You will eventually anyway. One thing to note is make sure you hold the lower skin tight to the longeron so you don't have any metal burrs lodged in between the skin and the longeron since you won't be able to deburr in between with the lower skin already riveted in place.

Have you riveted the lower skin on yet? Looking back, I think that time in the build was one of the most fun, since the project really starts looking like an airplane. Hopefully you'll be fitting the wings here really soon! (you'll need to do that first before you add the back of the spar carry through, and once that's done you'll be able to work on the lower seat assemblies).

Keep at it! :D