Aircraft design, aircraft structures, and emerging technology that may or may not revolutionize our sport.

If you've got a new or old way of doing something, share it here.

Rag wing construction questions and answers are posted in this forum

Anything and everything about composite construction.

Interested in sheet metal construction? This is the place to be.

Let’s get back to our aviation roots. Post your questions and comments on anything related to building wooden airplanes.

Let's talk engines, engine mounts, props, and plumbing. * Note * For specific questions about 2-Strokes and Auto-conversions, please see those areas.

If it involves using an auto engine in your plane, post it here.

All 2-strokes, all the time.

Radios, altimeters, pitot tubes, static ports, batteries, GPS, etc....

Sanding, painting, polishing, pin striping, upholstering or anything to do with dolling up your plane.

Let’s motivate our fellow builders. Whether they were completed yesterday, or 40 years ago, post your completed pride and joy here.