I started flying pattern about 1.5 years ago (mostly small models of 50 or 63 size) and since then i've been trying to find a 2m model that's cheap, modern looking and has good flying characteristics. Since all modern pattern planes on the market today are way over my spending limits, i recently started designing my own model using Solidworks. I'm almost done with the design part so i'll post a few images showing the main steps of the process.

From the start, i wanted to design the airframe keeping both electric and glow power in mind. The YS 170 is quite a big piece of equipment comparing to the electric motors, so it looked reasonable to design the front end of the plane around the Yamada engine. I don't own a YS myself, but using drawings from the manual and images i found on the internet, i started building a basic 3D model of the YS170. Well, i got a little bit carried away in the process and ended up recreating it in detail.