The Skybolt is a two-place unlimited aerobatic airplane introduced in 1971 by Lamar Steen. The design has proved very popular with homebuilders. More than than 500 have been completed. This beautiful example was completed in 1994.
Steen Aero Lab sells plans and components for the Skybolt. The Steen Aero Lab web site also offers a wealth of historical information about the planes they market including many articles from a number of publications.