Hi Heinz and Wurger.......
Most plans can be gotten in the Internet, there are literally thousands, some very good and some passable..Just make a Google search for "3 view aircraft plans" and you get quite a score.........You find plans for all scales but mostly
1:72 scale. you also find "conversion" tables for changing one scale to another but its very easy.
The SM-71 is only 12" wingspan....a little 8 passenger.
Should finish it soon, and post photos.............
Nice to say hi.
Gera