Perhaps this doesn't belong on a machining forum, as I designed this engine to avoid using machined parts. Instead, everything is off the self, laser cut, or 3D printed. I used a graphite piston set from air-pot.
To simply the crankshaft, I used a bell crank to offset the power piston motion...
This is the exact filament I used, but its currently out of stock: link
This is a material that should be equivalent: link
It's important to note that two different materials that are sold as "LW-PLA". One type is manufactured with small amounts of gas in the filament, this only expands...
It looks like amazon is no longer selling the exact filament I used, I've updated the link to a material that should be equivalent. It truly does "foam" during printing to 50% density (or less).
I haven't tried this with standard PLA, but most of the posts I've read by people who have say its...
Hey All,
I'd like to share some information on a 3D printing filament that I believe can be used in place of foam for lost foam casting. This allows you to go from a 3D print to a finished casting with basic equipment without burning out the plastic investment.
This filament is sold as...