Techniques

If that can help....

 How to make vertical wing spars

 How to make composite wing spars

 Graupner MC18 - 2.4Ghz conversion (Corona module)

 Vaccum pump for the poor... 10€ pump...

 That good old vintage covering. Covering open areas in plywood sheeted wings

 Build your own vaccum forming machine

 CNC milling machine.. Not that hard to build!

 How to repair Robart type hinges... Because sometimes, sh*t happen!

 Wing incidence claculation and flight attitude