• The Biplane Forum is a large global active community of biplane builders, owners and pilots. From Pitts to Skybolts, to older barnstormers, all types are welcome. In addition to our active community, our content boasts exhaustive technical information which is often sought after for projects and maintenance. This information has accumulated over the 12+ years the forum has been in existence.

    The Biplane Forum is a private community. Subscriptions are only $49.99/year or $6.99/month to gain access to this great community and unmatched source of information not found anywhere else on the web. We are also a great resource for non biplane users, since many GA aircraft are built the same way (fabric and tube construction). Annual membership also comes with two BiplaneForum.com decals.

source for rectangular tubing

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.


Well-Known Member
Sep 15, 2006
Reaction score
In our quest to make more fittings, we discovered the internal style flying/landing wire fittings call for 4 attachment pieces to be made out of 7/8"X1 3/4" X .100 4130 rectangular tube. I tried the obvious sources including ACS, Wick's and online metals. None have anything like it. Have any of you guys found a source for this or are you bending it up from .100 sheet?

Latest posts