With the winter now approaching and the flying season winding down as the evening light begins to fade earlier each evening; it can only mean the building season is just getting started! It seems nearly everyone in my local flying club has a Piper J-3 Cub, and after seeing a number of them at our local “Water and Wheels Fun Fly” this year I decided I needed to build one over the winter season.

After a bit of research, I chose to build the Sig 1/4 Scale Cub Kit as I have always been pleased with the quality components they provide in their kits.

Stay tuned to this page as it will be a multi-part series as the build progresses. The goal is to make this series quite detailed as to help others who also may be interested in building a Scale J-3 Cub model!

Planned components and modifications for this build:

• DLE or RCGF 40cc Twin Gas Engine
• Sig 1/4 Scale Floats
• Add a carbon fiber or aluminum wing tube
• Making wing center section removable to easy access to electronics
• Wing landing lights

• Build Series Part 1 – Fuslage Formers and Rear Formers F8-F11
• Build Series Part 2 – Rudder
• Build Series Part 3 – Horizontal Stabilizer & Elevator
• Build Series Part 4 – Truss work Fuselage Sides & Gluing Up Formers to Frame
• Build Series Part 5 – Gluing The Rear Of the Fuselage Together – Completing the Truss Framework
• Build Series Part 6 – Nose Section & Firewall
• Build Series Part 7 – Nose Sheeting, Engine Mounting
• Build Series Part 8 – Rear Formers & Stringers
• Build Series Part 9 – Fuselage Stringers, and Cabin Floor
• Build Series Part 10 – Cabin Access Door
• Build Series Part 11 – DLE 40 Cowl Cutout for J-3 Cub
• Build Series Part 12 – Wing, Bolt on center section, and wing tube.
• Build Series Part 13 – Covering and Finishing!

Supplemental Materials
Since the Formers F8 – F13 are not all shown on the plans I’ve included a PDF with the templates for download below.  These are the rear formers that go along the rear of the truss fuselage.  While these are specific to the Sig 1/4 Scale cub, they can be scaled up for down as needed for use in your cub project.

Sig J-3 Cub Rear Former Templates F8 – F13

Drilling a propeller for a DLE engine