• 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.

Pitts S1C aileron hinge question


Well-Known Member
Supporting Member
Dec 17, 2010
Reaction score
i am looking at the Steen Aero S1C plans for the aileron hinge. Is the 4130 brackets that you make to weld the RE3H5 bearing to .050 thick or .030 thick. It’s hard to read. It’s number. -31 on the chart. Thanks

Latest posts