I've been working on this on and off for a while, but since moving to Germany I can't work on my diesel project so I've gotten back to it. Basic parameters are a bore and stroke of 32mm for 25cc total displacement.
Sleeve valves work by moving up and down and oscillating from side to side driven by a crank mechanism. The timing is set by the movement of the sleeve and the ports cut into it. Given that this is to be a fairly low speed model, I wanted pretty mild timing which works out to smallish ports. The sleeve is driven by a peg that slides in a bronze ball. Note the junk head (basically a fixed piston complete with rings that acts as the cylinder head).
If it works out, I'd like to have the possibility of making a 3 cylinder radial version. What's puzzling me a bit is the inlet and exhaust layout, I'm not sure the best way of hooking all the ports from a round cylinder to a single carb and exhaust. Anyone got suggestions?
Sleeve valves work by moving up and down and oscillating from side to side driven by a crank mechanism. The timing is set by the movement of the sleeve and the ports cut into it. Given that this is to be a fairly low speed model, I wanted pretty mild timing which works out to smallish ports. The sleeve is driven by a peg that slides in a bronze ball. Note the junk head (basically a fixed piston complete with rings that acts as the cylinder head).
If it works out, I'd like to have the possibility of making a 3 cylinder radial version. What's puzzling me a bit is the inlet and exhaust layout, I'm not sure the best way of hooking all the ports from a round cylinder to a single carb and exhaust. Anyone got suggestions?
