Hatz Biplane Association

I have one of the first fuselages welded up by Jeff at Makelan. He used .06" for these tabs.

Juerg

I used .050 for the former tabs, and used DuBro 8-32 blind nuts in the formers.

I have 28 tabs holding on my formers. This includes the ones at the front inside the curved channel.

I didn't count them all. There are eight of the 125 thickness required for the anti-torque tube. One of the drawings (FU125) from the web had forty so I assumed forty were required. I'll have to admit I haven't looked seriously at the frame yet. I was thinking if I'm having parts cut I might as well get the full sheet done. There is a $150 minimum charge.

Thanks all.
I think I'll go with 0.050". I have some left over from other parts water-jet cut. You really only need 16 of these tabs.

I actually thought about that and I can see no reason why it wouldn't. I do think that the brackets are easier though. I have taken the formers off a couple of times and having threads in them is much easier than futzing with Adel clamps and hardware. Remember that you have to fish your hand and wrench in between the fuselage and the formers, squeeze the clamp,line up the holes, get the nut and washer on...

Just curious could you use AN742 Adel clamps?
Not to plans but would it work?

It might be over kill but it sure holds them good

That tabs for the spar fittings on drawing 06 were 125. So I just had forty tabs waterjet cut from the same material. Probably overkill. 0.125 seems excessive to hold the formers now that you question it. The wing fittings are only 090 and they hold the wing ??? When I get the 050 material cut I may just have another forty tabs cut from that. If somethings going to fail, it's probably the 035 tubing not the thicker tabs.

I made mine .125 also and tapped them 8/32.