23 May 2012
Two cylinder rotary valve engine done!
I finally finished the latest engine. These things seem to get simpler and easier each time. I tried to make two crankshafts at once, thinking if both of them turned out I could make a second engine. Well trying to finish the second shaft it got mangled. Oh well, I've got a working engine anyway. Cutting the valve rod was tricky, it's running on #2.
I made sure everything was very smooth and in some places just a bit loose. After a good run-in it will run on breath power, which is somewhere near 3-4 PSI max. That amazes me because none of my previous engines were free enough to run on lung power.
I was considering painting some parts of the engine but I couldn't decide which parts or what color and my wife said she likes it raw. Nothing is polished, just sanded to be smooth. I may still go back and paint the steel parts to prevent rust at least.