The Myfordboy Steam Roller Part 1. Double Acting Engine for a Mamod.

I designed and built this engine to replace the single acting Mamod one on Traction engine and steam rollers. It puts the cylinder inboard in a more realist position. I don't have a Mamod engine but am now building my own version as the engine runs so well. Big thanks to Retro SteamTech channel for giving me some dimentions of a Mamod roller. Check out Allan's Roller restoration here:    • Mamod SR1 Steam Roller