Sanding, painting, polishing, pin striping, upholstering or anything to do with dolling up your plane.
FAACertificationforHome-builtAircraft:•The51%Rule.Someonecanqualifyforahome-builtairworthinesscertificateiftheyhavedonemorethan50%ofthefabricationorassemblyoftheaircraftand“undertooktheconstructionprojectsolelyfortheirowneducationorrecreation.”FAR21.191(g).•51%Ruledoesnotmeanthatthemanufacturerofthekithasno...
Manufacturers may be slow to sponsor this sort of racing because there’s no obvious street version they can sell, though component companies should be willing to get their name out front in what could be a new venue, but it’s tailor made for the DIY home workshop guys. I’m not sure...