• 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.

Spring gear/wing root buffet

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


Well-Known Member
Apr 4, 2007
Reaction score
I just picked up a Pitts S-1S that was built with Spring gear.

The builder documented an issue with aggressive wing-root buffet and attributed it to the Spring gear. He then built some 'fins' that he attached in-trail with the Spring assembly. The note in the airframe logbook indicates "...installed fairings. Test flew and found buffet characteristics have been eliminated..."

I beg the differ.

The airframe flies geat, stalls clean, and has no indication of trouble until very high angles of attack. Typically as youapproach vertical on an inside loop, the buffet begins and continues until inverted. All controls appear to maintain authority. The buffet is felt throughout the fuselage. There is little indication of trouble from the elevator feedback.

Any ideas? I'll push it out and take pictures of the configuration if needed.

Latest posts