• 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.

Router Bits

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


Aug 15, 2008
Reaction score
Hello Folks,

I'm making ribs for a Culp Special - a derivative of the Skybolt. I want to use a laminate flush-trim router bit to trim my gussets even with the cap strips. However, I'm running into a problem.

The Freud bit I purchased, and the one from Woodcraft has the same problem, has too much space between the bottom of the bearing and the top of the cutting portion.

Look at this photo for an example.

The photo is deceptive - in truth there is a large gap (1/8") between the bearing and the cutting portion. That gap means that if the bearing is riding on the cap strip, the intended gusset is falling between the bearing and the cutter. So the gusset is not getting cut.

Does anybody have a part number for a router bit that works well on 1/4 inch cap strip ribs?

Thanks, Zeke

As an interesting aside... the local Woodcraft store has a neat employee - he worked with Ken Hyde making the flyable (theoretically) replica of the Wright Flyer... the original biplane. He's terrific because he knows exactly what I'm trying to do and understands the problems and understand the constraints of the aviation world.


Latest posts