So, as my intro post explains, I have no experience making model engines. I'm working on my BS as a MechE, so I have no problems diving in head first. I'm making all the parts in Inventor first. I'm posting my work/thoughts here for constructive criticism. I will warn you ahead of time, many of my ideas/plans may seem odd or uncomon for what I'm building first. Just give me the pros/cons instead of turning it into a flame war. The Idea: I eventually want to work on making a supercharged V12 (similar to the Artus V12 from Germany). For now, I'm going to make a 4-stroke, 2-cylinder opposed engine. The idea is to actually use this on a scale model aircraft (so it has to work). I'll be experimenting on production techniques on this 2-cylinder for experience/ideas on the much bigger V12. The plan is to run pure methanol with a manual mix of pure nitromethane (not the mixed 'nitro' from hobby shops). Oil control is separate, and pressurized/forced/whatever-have-you. This should allow me to run high compression with slight supercharging. So first up, the piston design. So far, 1in diameter dished piston. Two rings (will be fine-grained iron - Tremble method). I'm still debating on an oil control ring. Thoughts?