It will have 7mm(0.275") bore, and 10mm(0.393") stroke, so it's about 1/3 of the original drawings size.
For carburetion I'm going to try 'petrol vapour carburetor' as described on Jan Ridder's site: http://heetgasmodelbouw.ridders.nu/Webp ... ameset.htm
Ignition will be piezo-operated, and idea for it came also from Ridder's site.
To find out how those work on smaller size, only way is to actually build them, I guess.
Spark plug is also going to be so small, that I'll have to make it myself.
Anyway it's interesting thing to try to build all those.
Here first picture of the project:
Only those gears are ready-made ones that I found from my junkbox.
Cylinder and piston are missing, because cast iron bar that I ordered for those, hasn't came yet.
Current progression altogether:
