Short on main journals like a Lincoln Zephyr - but cool. I have heard people talking about this, so I'm glad to have finally seen it. I guess it's a little different than a compressor, this would be cooled by the air going through it, so the lubrication requirements would be light... I wonder if there is a reservoir for the crank? After 1250 hours building it, you'd still be sorry to seize a rod on that beautiful little crankshaft.