13 ccm sleeve valve engine (180°-V-twin, glow ignited)

grabcad

To provide a little challenge for myself, I designed an engine based on the 6.5ccm model, creating a 180° V-twin. Although the crankshaft is thin, other components should work reasonably well. It features the same Burt-McCollum sleeve valve design as the 6.5ccm and the same 2 in/2 out port layout. Piston 2 follows piston 1 with a 180° angle per crankshaft turn, while both intake and exhaust ports open 10° ahead of the crankshaft position - intake opening coincides with exhaust closure. (That was my plan anyway...)