SIGN THE PETITION! >> https://ig-hangflug.eu/petition
At smaller scales full size airfoils don't usually work. it's all to do with Reynolds numbers.As Alan says Chris Wiliams advocates the Quabeck sections even in his 1/3 scale aircraft
Suffering alack of enthusiasm at the moment, probably as a aresult of too little flying. :cry: You need some return from your building efforts