Piper J-4 Cub Coupe — Weight And Balance

This document details the restoration process of the Piper J-4A Cub Coupe, highlighting the challenges and techniques employed during the project. The author, Alan P. Anderson, shares insights gained from restoring his 1940 Piper J-4A, which won an award for workmanship at the Oshkosh event. The article covers various aspects of the restoration, including fuselage, wings, tail surfaces, chassis, cockpit, engine installation, electrical systems, and fairings. It serves as a guide for vintage aircraft restorers and enthusiasts, providing practical advice and technical details relevant to the J-4 series.

• The Piper J-4A was introduced in 1940 and features a unique design compared to other Piper models.
• Restoration techniques include the inner sleeve method for fuselage repairs and careful alignment of components.
• The wings were upgraded with more durable materials and required extensive repairs due to damage.
• The landing gear system was significantly reworked to ensure proper functionality and safety.
• The engine was upgraded from a Continental A-65-8 to a C-85-12, enhancing performance without major modifications.