Search results

Looks like a nice runner. I do have a question though, why is the rod offset in the piston? I had seen it in some earlier posts and thought it was an illusion, but I don’t think it is (but maybe)

That crawler chassis looks pretty awesome. Do you have any other pictures of the build? Anything next to it for scale?

I mixed my own. John Deere starting fluid, kerosene, castor base 2 stroke oil. Equal parts

I wouldn’t really call it “difficult”, it’s really just basic machining. Most important thing is watching tolerances of mating parts and keeping those fits good. Drawings are good although I did make a few changes to suit. Mostly to the prop mounting.

I didn’t make a lap for the cylinder or piston. My lathe is pretty clapped out so it cuts on a taper(which somewhat worked to my advantage on this). I did hit the surface of the cylinder with a fine grit ball home and then ran a 1/2” buffing wheel on the Dremel with some polishing compound...

Since this thread popped back up. Here is a pic of a Boll Aero that I recently completed.

Are you going to do the “front/back” timing belt again or attempt to get it all in the front “Subaru style”?