Another 1/4" copper tube engine
- Another 1/4" copper tube engine similar to Daryl's engines. Appears to develop decent thrust from two candles. I'm somewhat interested in the 1/4" and larger copper tubing as it cost about the same as the small brass tubing at the hobby shop. Found a guy nearby that sells 55 gal. drums for $15. Hmmm..., BIG engine thoughts.