Chest - wooden transport pipe - cobblestone transport pipe - stirling engine
           ^Redstone engine connected to W.T.P.
Im trying to power the stirling engine with lava buckets. I know ill have to extract the empty buckets but im not worried about that right now. The issue is that everytime the bucket gets to the engine, the bucket pops out of the pipe and doesnt go into the engine. Any ideas as to why its not going into the engine?