Hatz Biplane Association

'm not sure what I'm looking at….is the bracket cut there to make room for it?

I used two NC nuts welded together then welded to the bracket:



As for RSTW3 doubler….weld all around except the top.

-Scott

For RSTW3 I did not weld the top edge but I did weld around the rest. I was concerned about not welding the top and the fact that the two surfaces inside are just bare metal. When I did the powder coat I applied a very heavy coat along the top seam. I have looked carefully at pictures posted by others and some are welded and some are not. The only reason that I could think of not to weld is that it creates a slight undercut and could provide a stress area. I thought of soldering it but worried about the flux getting inside.
Since I went with the powder coating rather than paint I was very happy with how it filled the seam. Epoxy paint might fill just as well.

Thinking of using this http://www.boltdepot.com/Product-Detail ... duct=12122

Does it come in steel or just stainless steel? It may be difficult to weld stainless to the 4130 mild steel bracket.

-Scott

I agree with Scott, I might try one of these http://www.boltdepot.com/Coupling_nuts_ ... steel.aspx

Wasn't sure about welding, but in that case, this one should work. Thanks! http://www.boltdepot.com/Product-Detail ... duct=12113

John,
Tonight I hit that point in my build and went looking for hardware. I noticed that your link doesn't reference any 1/4 x 28 hardware as called out for on the plans although you could use the 1/4 x 20 version, I think that I am going Scotts way and welding two 1/4 x 28 nuts together. If you use 1/4 x 20 I don't think you will be able to find an AN tiedown ring with those threads. If you weld two nuts together be sure that you insert a bolt so that the threads stay aligned.

-Ed

Try this link for 1/4-28 couplers. Of course there are 10 to a pack and you will have extra's
http://www.grainger.com/product/Rod-Coupling-Nut-1JA57
Regards,
Rick

Thanks for all the responses. I guess I'll send an order to Grainger. If it's too long, I'll cut it. The coupler I received from Bolt Depot was definitely too small (#10).