Need advice

[MNBenny]

We're going to start the center ribs next that are the .032


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[MNBenny]

Hi everyone yet another question....I'm working on the center ribs, and I was wondering can I wait to add the lightning hole that it calls out for or should add it right away before I start cutting blanks. My plan is to cut the ribs closest to the root rib and fuel tank first before cutting the .025 outboard ribs.


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[Chris In Milwaukee]

Another question. We are going to layout drawing number 7 but what I'm wondering is how many full size ribs are there at the end of the wing? Eric doesn't really spell that out.


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There are only two, one on each wing tip.

[Chris In Milwaukee]

Hi everyone yet another question....I'm working on the center ribs, and I was wondering can I wait to add the lightning hole that it calls out for or should add it right away before I start cutting blanks. My plan is to cut the ribs closest to the root rib and fuel tank first before cutting the .025 outboard ribs.

You can wait or do them at the same time. If you're cutting the holes with a fly cutter, you can do them after they're cut out. I did all mine at once with the router. My routing forms have the lightening holes in them.

[MNBenny]

I do have a fly cutter

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[BTAZ]

I highly recommend the "Rubber press" method of flanging the lightening holes. To do this, you will likely want the lightening holes in your router forms so you can chamfer their edges(using a 45 degree router bit) to serve as the form block when you press in the flanges.

[MNBenny]

I don't own a press


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[MNBenny]

My new 3 flute router bit here!







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[Chris In Milwaukee]

Ooooo, nice! That should do a very nice job.

[MNBenny]

Well 9 center rib blanks got cut today







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[Chris In Milwaukee]

Looking good. Be careful with those jig holes. Some are appearing at random locations, it seems. Be sure you know *exactly* where that little hole is going to be when you start cutting other holes in them. Those things can only be within 2D (2x the diameter of the hole) from the edge of anything else, including other holes.

[MNBenny]

Remember that the lightning holes are not cut into the blanks yet


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[Chris In Milwaukee]

Yep, which is why I mentioned it. Looking good so far.

[Bcone1381]

I highly recommend the "Rubber press" method of flanging the lightening holes. To do this, you will likely want the lightening holes in your router forms so you can chamfer their edges(using a 45 degree router bit) to serve as the form block when you press in the flanges.

We are fortunate to have BTAZ's help. He is a person who has built multiple airplanes, scratch built an LSA in about 3.5 years and he cares enough to counsel and mentor us novices. I show great restraint in merely saying that he seems like a person we might want to listen to.

[Chris In Milwaukee]

I made it half way around one hole with a Bob Stick. It didn't take a lot to convince me that Harbor Freight needed me to come and buy a press!